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  103.                   <a href="../../hadoop-project-dist/hadoop-common/HttpAuthentication.html">HTTP Authentication</a>
    104. 

  104.             </li>
    105. 

  105.                   <li class="none">
    106. 

  106.                   <a href="../../hadoop-project-dist/hadoop-common/CredentialProviderAPI.html">Credential Provider API</a>
    107. 

  107.             </li>
    108. 

  108.                   <li class="none">
    109. 

  109.                   <a href="../../hadoop-kms/index.html">Hadoop KMS</a>
    110. 

  110.             </li>
    111. 

  111.                   <li class="none">
    112. 

  112.                   <a href="../../hadoop-project-dist/hadoop-common/Tracing.html">Tracing</a>
    113. 

  113.             </li>
    114. 

  114.                   <li class="none">
    115. 

  115.                   <a href="../../hadoop-project-dist/hadoop-common/UnixShellGuide.html">Unix Shell Guide</a>
    116. 

  116.             </li>
    117. 

  117.                   <li class="none">
    118. 

  118.                   <a href="../../hadoop-project-dist/hadoop-common/registry/index.html">Registry</a>
    119. 

  119.             </li>
    120. 

  120.                   <li class="none">
    121. 

  121.                   <a href="../../hadoop-project-dist/hadoop-common/AsyncProfilerServlet.html">Async Profiler</a>
    122. 

  122.             </li>
    123. 

  123.           </ul>
    124. 

  124.                        <h5>HDFS</h5>
    125. 

  125.                   <ul>
    126. 

  126.                   <li class="none">
    127. 

  127.                   <a href="../../hadoop-project-dist/hadoop-hdfs/HdfsDesign.html">Architecture</a>
    128. 

  128.             </li>
    129. 

  129.                   <li class="none">
    130. 

  130.                   <a href="../../hadoop-project-dist/hadoop-hdfs/HdfsUserGuide.html">User Guide</a>
    131. 

  131.             </li>
    132. 

  132.                   <li class="none">
    133. 

  133.                   <a href="../../hadoop-project-dist/hadoop-hdfs/HDFSCommands.html">Commands Reference</a>
    134. 

  134.             </li>
    135. 

  135.                   <li class="none">
    136. 

  136.                   <a href="../../hadoop-project-dist/hadoop-hdfs/HDFSHighAvailabilityWithQJM.html">NameNode HA With QJM</a>
    137. 

  137.             </li>
    138. 

  138.                   <li class="none">
    139. 

  139.                   <a href="../../hadoop-project-dist/hadoop-hdfs/HDFSHighAvailabilityWithNFS.html">NameNode HA With NFS</a>
    140. 

  140.             </li>
    141. 

  141.                   <li class="none">
    142. 

  142.                   <a href="../../hadoop-project-dist/hadoop-hdfs/ObserverNameNode.html">Observer NameNode</a>
    143. 

  143.             </li>
    144. 

  144.                   <li class="none">
    145. 

  145.                   <a href="../../hadoop-project-dist/hadoop-hdfs/Federation.html">Federation</a>
    146. 

  146.             </li>
    147. 

  147.                   <li class="none">
    148. 

  148.                   <a href="../../hadoop-project-dist/hadoop-hdfs/ViewFs.html">ViewFs</a>
    149. 

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    150. 

  150.                   <li class="none">
    151. 

  151.                   <a href="../../hadoop-project-dist/hadoop-hdfs/ViewFsOverloadScheme.html">ViewFsOverloadScheme</a>
    152. 

  152.             </li>
    153. 

  153.                   <li class="none">
    154. 

  154.                   <a href="../../hadoop-project-dist/hadoop-hdfs/HdfsSnapshots.html">Snapshots</a>
    155. 

  155.             </li>
    156. 

  156.                   <li class="none">
    157. 

  157.                   <a href="../../hadoop-project-dist/hadoop-hdfs/HdfsEditsViewer.html">Edits Viewer</a>
    158. 

  158.             </li>
    159. 

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    160. 

  160.                   <a href="../../hadoop-project-dist/hadoop-hdfs/HdfsImageViewer.html">Image Viewer</a>
    161. 

  161.             </li>
    162. 

  162.                   <li class="none">
    163. 

  163.                   <a href="../../hadoop-project-dist/hadoop-hdfs/HdfsPermissionsGuide.html">Permissions and HDFS</a>
    164. 

  164.             </li>
    165. 

  165.                   <li class="none">
    166. 

  166.                   <a href="../../hadoop-project-dist/hadoop-hdfs/HdfsQuotaAdminGuide.html">Quotas and HDFS</a>
    167. 

  167.             </li>
    168. 

  168.                   <li class="none">
    169. 

  169.                   <a href="../../hadoop-project-dist/hadoop-hdfs/LibHdfs.html">libhdfs (C API)</a>
    170. 

  170.             </li>
    171. 

  171.                   <li class="none">
    172. 

  172.                   <a href="../../hadoop-project-dist/hadoop-hdfs/WebHDFS.html">WebHDFS (REST API)</a>
    173. 

  173.             </li>
    174. 

  174.                   <li class="none">
    175. 

  175.                   <a href="../../hadoop-hdfs-httpfs/index.html">HttpFS</a>
    176. 

  176.             </li>
    177. 

  177.                   <li class="none">
    178. 

  178.                   <a href="../../hadoop-project-dist/hadoop-hdfs/ShortCircuitLocalReads.html">Short Circuit Local Reads</a>
    179. 

  179.             </li>
    180. 

  180.                   <li class="none">
    181. 

  181.                   <a href="../../hadoop-project-dist/hadoop-hdfs/CentralizedCacheManagement.html">Centralized Cache Management</a>
    182. 

  182.             </li>
    183. 

  183.                   <li class="none">
    184. 

  184.                   <a href="../../hadoop-project-dist/hadoop-hdfs/HdfsNfsGateway.html">NFS Gateway</a>
    185. 

  185.             </li>
    186. 

  186.                   <li class="none">
    187. 

  187.                   <a href="../../hadoop-project-dist/hadoop-hdfs/HdfsRollingUpgrade.html">Rolling Upgrade</a>
    188. 

  188.             </li>
    189. 

  189.                   <li class="none">
    190. 

  190.                   <a href="../../hadoop-project-dist/hadoop-hdfs/ExtendedAttributes.html">Extended Attributes</a>
    191. 

  191.             </li>
    192. 

  192.                   <li class="none">
    193. 

  193.                   <a href="../../hadoop-project-dist/hadoop-hdfs/TransparentEncryption.html">Transparent Encryption</a>
    194. 

  194.             </li>
    195. 

  195.                   <li class="none">
    196. 

  196.                   <a href="../../hadoop-project-dist/hadoop-hdfs/HdfsMultihoming.html">Multihoming</a>
    197. 

  197.             </li>
    198. 

  198.                   <li class="none">
    199. 

  199.                   <a href="../../hadoop-project-dist/hadoop-hdfs/ArchivalStorage.html">Storage Policies</a>
    200. 

  200.             </li>
    201. 

  201.                   <li class="none">
    202. 

  202.                   <a href="../../hadoop-project-dist/hadoop-hdfs/MemoryStorage.html">Memory Storage Support</a>
    203. 

  203.             </li>
    204. 

  204.                   <li class="none">
    205. 

  205.                   <a href="../../hadoop-project-dist/hadoop-hdfs/SLGUserGuide.html">Synthetic Load Generator</a>
    206. 

  206.             </li>
    207. 

  207.                   <li class="none">
    208. 

  208.                   <a href="../../hadoop-project-dist/hadoop-hdfs/HDFSErasureCoding.html">Erasure Coding</a>
    209. 

  209.             </li>
    210. 

  210.                   <li class="none">
    211. 

  211.                   <a href="../../hadoop-project-dist/hadoop-hdfs/HDFSDiskbalancer.html">Disk Balancer</a>
    212. 

  212.             </li>
    213. 

  213.                   <li class="none">
    214. 

  214.                   <a href="../../hadoop-project-dist/hadoop-hdfs/HdfsUpgradeDomain.html">Upgrade Domain</a>
    215. 

  215.             </li>
    216. 

  216.                   <li class="none">
    217. 

  217.                   <a href="../../hadoop-project-dist/hadoop-hdfs/HdfsDataNodeAdminGuide.html">DataNode Admin</a>
    218. 

  218.             </li>
    219. 

  219.                   <li class="none">
    220. 

  220.                   <a href="../../hadoop-project-dist/hadoop-hdfs-rbf/HDFSRouterFederation.html">Router Federation</a>
    221. 

  221.             </li>
    222. 

  222.                   <li class="none">
    223. 

  223.                   <a href="../../hadoop-project-dist/hadoop-hdfs/HdfsProvidedStorage.html">Provided Storage</a>
    224. 

  224.             </li>
    225. 

  225.           </ul>
    226. 

  226.                        <h5>MapReduce</h5>
    227. 

  227.                   <ul>
    228. 

  228.                   <li class="none">
    229. 

  229.                   <a href="../../hadoop-mapreduce-client/hadoop-mapreduce-client-core/MapReduceTutorial.html">Tutorial</a>
    230. 

  230.             </li>
    231. 

  231.                   <li class="none">
    232. 

  232.                   <a href="../../hadoop-mapreduce-client/hadoop-mapreduce-client-core/MapredCommands.html">Commands Reference</a>
    233. 

  233.             </li>
    234. 

  234.                   <li class="none">
    235. 

  235.                   <a href="../../hadoop-mapreduce-client/hadoop-mapreduce-client-core/MapReduce_Compatibility_Hadoop1_Hadoop2.html">Compatibility with 1.x</a>
    236. 

  236.             </li>
    237. 

  237.                   <li class="none">
    238. 

  238.                   <a href="../../hadoop-mapreduce-client/hadoop-mapreduce-client-core/EncryptedShuffle.html">Encrypted Shuffle</a>
    239. 

  239.             </li>
    240. 

  240.                   <li class="none">
    241. 

  241.                   <a href="../../hadoop-mapreduce-client/hadoop-mapreduce-client-core/PluggableShuffleAndPluggableSort.html">Pluggable Shuffle/Sort</a>
    242. 

  242.             </li>
    243. 

  243.                   <li class="none">
    244. 

  244.                   <a href="../../hadoop-mapreduce-client/hadoop-mapreduce-client-core/DistributedCacheDeploy.html">Distributed Cache Deploy</a>
    245. 

  245.             </li>
    246. 

  246.                   <li class="none">
    247. 

  247.                   <a href="../../hadoop-mapreduce-client/hadoop-mapreduce-client-core/SharedCacheSupport.html">Support for YARN Shared Cache</a>
    248. 

  248.             </li>
    249. 

  249.           </ul>
    250. 

  250.                        <h5>MapReduce REST APIs</h5>
    251. 

  251.                   <ul>
    252. 

  252.                   <li class="none">
    253. 

  253.                   <a href="../../hadoop-mapreduce-client/hadoop-mapreduce-client-core/MapredAppMasterRest.html">MR Application Master</a>
    254. 

  254.             </li>
    255. 

  255.                   <li class="none">
    256. 

  256.                   <a href="../../hadoop-mapreduce-client/hadoop-mapreduce-client-hs/HistoryServerRest.html">MR History Server</a>
    257. 

  257.             </li>
    258. 

  258.           </ul>
    259. 

  259.                        <h5>YARN</h5>
    260. 

  260.                   <ul>
    261. 

  261.                   <li class="none">
    262. 

  262.                   <a href="../../hadoop-yarn/hadoop-yarn-site/YARN.html">Architecture</a>
    263. 

  263.             </li>
    264. 

  264.                   <li class="none">
    265. 

  265.                   <a href="../../hadoop-yarn/hadoop-yarn-site/YarnCommands.html">Commands Reference</a>
    266. 

  266.             </li>
    267. 

  267.                   <li class="none">
    268. 

  268.                   <a href="../../hadoop-yarn/hadoop-yarn-site/CapacityScheduler.html">Capacity Scheduler</a>
    269. 

  269.             </li>
    270. 

  270.                   <li class="none">
    271. 

  271.                   <a href="../../hadoop-yarn/hadoop-yarn-site/FairScheduler.html">Fair Scheduler</a>
    272. 

  272.             </li>
    273. 

  273.                   <li class="none">
    274. 

  274.                   <a href="../../hadoop-yarn/hadoop-yarn-site/ResourceManagerRestart.html">ResourceManager Restart</a>
    275. 

  275.             </li>
    276. 

  276.                   <li class="none">
    277. 

  277.                   <a href="../../hadoop-yarn/hadoop-yarn-site/ResourceManagerHA.html">ResourceManager HA</a>
    278. 

  278.             </li>
    279. 

  279.                   <li class="none">
    280. 

  280.                   <a href="../../hadoop-yarn/hadoop-yarn-site/ResourceModel.html">Resource Model</a>
    281. 

  281.             </li>
    282. 

  282.                   <li class="none">
    283. 

  283.                   <a href="../../hadoop-yarn/hadoop-yarn-site/NodeLabel.html">Node Labels</a>
    284. 

  284.             </li>
    285. 

  285.                   <li class="none">
    286. 

  286.                   <a href="../../hadoop-yarn/hadoop-yarn-site/NodeAttributes.html">Node Attributes</a>
    287. 

  287.             </li>
    288. 

  288.                   <li class="none">
    289. 

  289.                   <a href="../../hadoop-yarn/hadoop-yarn-site/WebApplicationProxy.html">Web Application Proxy</a>
    290. 

  290.             </li>
    291. 

  291.                   <li class="none">
    292. 

  292.                   <a href="../../hadoop-yarn/hadoop-yarn-site/TimelineServer.html">Timeline Server</a>
    293. 

  293.             </li>
    294. 

  294.                   <li class="none">
    295. 

  295.                   <a href="../../hadoop-yarn/hadoop-yarn-site/TimelineServiceV2.html">Timeline Service V.2</a>
    296. 

  296.             </li>
    297. 

  297.                   <li class="none">
    298. 

  298.                   <a href="../../hadoop-yarn/hadoop-yarn-site/WritingYarnApplications.html">Writing YARN Applications</a>
    299. 

  299.             </li>
    300. 

  300.                   <li class="none">
    301. 

  301.                   <a href="../../hadoop-yarn/hadoop-yarn-site/YarnApplicationSecurity.html">YARN Application Security</a>
    302. 

  302.             </li>
    303. 

  303.                   <li class="none">
    304. 

  304.                   <a href="../../hadoop-yarn/hadoop-yarn-site/NodeManager.html">NodeManager</a>
    305. 

  305.             </li>
    306. 

  306.                   <li class="none">
    307. 

  307.                   <a href="../../hadoop-yarn/hadoop-yarn-site/DockerContainers.html">Running Applications in Docker Containers</a>
    308. 

  308.             </li>
    309. 

  309.                   <li class="none">
    310. 

  310.                   <a href="../../hadoop-yarn/hadoop-yarn-site/RuncContainers.html">Running Applications in runC Containers</a>
    311. 

  311.             </li>
    312. 

  312.                   <li class="none">
    313. 

  313.                   <a href="../../hadoop-yarn/hadoop-yarn-site/NodeManagerCgroups.html">Using CGroups</a>
    314. 

  314.             </li>
    315. 

  315.                   <li class="none">
    316. 

  316.                   <a href="../../hadoop-yarn/hadoop-yarn-site/SecureContainer.html">Secure Containers</a>
    317. 

  317.             </li>
    318. 

  318.                   <li class="none">
    319. 

  319.                   <a href="../../hadoop-yarn/hadoop-yarn-site/ReservationSystem.html">Reservation System</a>
    320. 

  320.             </li>
    321. 

  321.                   <li class="none">
    322. 

  322.                   <a href="../../hadoop-yarn/hadoop-yarn-site/GracefulDecommission.html">Graceful Decommission</a>
    323. 

  323.             </li>
    324. 

  324.                   <li class="none">
    325. 

  325.                   <a href="../../hadoop-yarn/hadoop-yarn-site/OpportunisticContainers.html">Opportunistic Containers</a>
    326. 

  326.             </li>
    327. 

  327.                   <li class="none">
    328. 

  328.                   <a href="../../hadoop-yarn/hadoop-yarn-site/Federation.html">YARN Federation</a>
    329. 

  329.             </li>
    330. 

  330.                   <li class="none">
    331. 

  331.                   <a href="../../hadoop-yarn/hadoop-yarn-site/SharedCache.html">Shared Cache</a>
    332. 

  332.             </li>
    333. 

  333.                   <li class="none">
    334. 

  334.                   <a href="../../hadoop-yarn/hadoop-yarn-site/UsingGpus.html">Using GPU</a>
    335. 

  335.             </li>
    336. 

  336.                   <li class="none">
    337. 

  337.                   <a href="../../hadoop-yarn/hadoop-yarn-site/UsingFPGA.html">Using FPGA</a>
    338. 

  338.             </li>
    339. 

  339.                   <li class="none">
    340. 

  340.                   <a href="../../hadoop-yarn/hadoop-yarn-site/PlacementConstraints.html">Placement Constraints</a>
    341. 

  341.             </li>
    342. 

  342.                   <li class="none">
    343. 

  343.                   <a href="../../hadoop-yarn/hadoop-yarn-site/YarnUI2.html">YARN UI2</a>
    344. 

  344.             </li>
    345. 

  345.           </ul>
    346. 

  346.                        <h5>YARN REST APIs</h5>
    347. 

  347.                   <ul>
    348. 

  348.                   <li class="none">
    349. 

  349.                   <a href="../../hadoop-yarn/hadoop-yarn-site/WebServicesIntro.html">Introduction</a>
    350. 

  350.             </li>
    351. 

  351.                   <li class="none">
    352. 

  352.                   <a href="../../hadoop-yarn/hadoop-yarn-site/ResourceManagerRest.html">Resource Manager</a>
    353. 

  353.             </li>
    354. 

  354.                   <li class="none">
    355. 

  355.                   <a href="../../hadoop-yarn/hadoop-yarn-site/NodeManagerRest.html">Node Manager</a>
    356. 

  356.             </li>
    357. 

  357.                   <li class="none">
    358. 

  358.                   <a href="../../hadoop-yarn/hadoop-yarn-site/TimelineServer.html#Timeline_Server_REST_API_v1">Timeline Server</a>
    359. 

  359.             </li>
    360. 

  360.                   <li class="none">
    361. 

  361.                   <a href="../../hadoop-yarn/hadoop-yarn-site/TimelineServiceV2.html#Timeline_Service_v.2_REST_API">Timeline Service V.2</a>
    362. 

  362.             </li>
    363. 

  363.           </ul>
    364. 

  364.                        <h5>YARN Service</h5>
    365. 

  365.                   <ul>
    366. 

  366.                   <li class="none">
    367. 

  367.                   <a href="../../hadoop-yarn/hadoop-yarn-site/yarn-service/Overview.html">Overview</a>
    368. 

  368.             </li>
    369. 

  369.                   <li class="none">
    370. 

  370.                   <a href="../../hadoop-yarn/hadoop-yarn-site/yarn-service/QuickStart.html">QuickStart</a>
    371. 

  371.             </li>
    372. 

  372.                   <li class="none">
    373. 

  373.                   <a href="../../hadoop-yarn/hadoop-yarn-site/yarn-service/Concepts.html">Concepts</a>
    374. 

  374.             </li>
    375. 

  375.                   <li class="none">
    376. 

  376.                   <a href="../../hadoop-yarn/hadoop-yarn-site/yarn-service/YarnServiceAPI.html">Yarn Service API</a>
    377. 

  377.             </li>
    378. 

  378.                   <li class="none">
    379. 

  379.                   <a href="../../hadoop-yarn/hadoop-yarn-site/yarn-service/ServiceDiscovery.html">Service Discovery</a>
    380. 

  380.             </li>
    381. 

  381.                   <li class="none">
    382. 

  382.                   <a href="../../hadoop-yarn/hadoop-yarn-site/yarn-service/SystemServices.html">System Services</a>
    383. 

  383.             </li>
    384. 

  384.           </ul>
    385. 

  385.                        <h5>Hadoop Compatible File Systems</h5>
    386. 

  386.                   <ul>
    387. 

  387.                   <li class="none">
    388. 

  388.                   <a href="../../hadoop-aliyun/tools/hadoop-aliyun/index.html">Aliyun OSS</a>
    389. 

  389.             </li>
    390. 

  390.                   <li class="none">
    391. 

  391.                   <a href="../../hadoop-aws/tools/hadoop-aws/index.html">Amazon S3</a>
    392. 

  392.             </li>
    393. 

  393.                   <li class="none">
    394. 

  394.                   <a href="../../hadoop-azure/index.html">Azure Blob Storage</a>
    395. 

  395.             </li>
    396. 

  396.                   <li class="none">
    397. 

  397.                   <a href="../../hadoop-azure-datalake/index.html">Azure Data Lake Storage</a>
    398. 

  398.             </li>
    399. 

  399.                   <li class="none">
    400. 

  400.                   <a href="../../hadoop-cos/cloud-storage/index.html">Tencent COS</a>
    401. 

  401.             </li>
    402. 

  402.                   <li class="none">
    403. 

  403.                   <a href="../../hadoop-huaweicloud/index.html">Huaweicloud OBS</a>
    404. 

  404.             </li>
    405. 

  405.                   <li class="none">
    406. 

  406.                   <a href="../../hadoop-tos/cloud-storage/index.html">VolcanoEngine TOS</a>
    407. 

  407.             </li>
    408. 

  408.           </ul>
    409. 

  409.                        <h5>Auth</h5>
    410. 

  410.                   <ul>
    411. 

  411.                   <li class="none">
    412. 

  412.                   <a href="../../hadoop-auth/index.html">Overview</a>
    413. 

  413.             </li>
    414. 

  414.                   <li class="none">
    415. 

  415.                   <a href="../../hadoop-auth/Examples.html">Examples</a>
    416. 

  416.             </li>
    417. 

  417.                   <li class="none">
    418. 

  418.                   <a href="../../hadoop-auth/Configuration.html">Configuration</a>
    419. 

  419.             </li>
    420. 

  420.                   <li class="none">
    421. 

  421.                   <a href="../../hadoop-auth/BuildingIt.html">Building</a>
    422. 

  422.             </li>
    423. 

  423.           </ul>
    424. 

  424.                        <h5>Tools</h5>
    425. 

  425.                   <ul>
    426. 

  426.                   <li class="none">
    427. 

  427.                   <a href="../../hadoop-streaming/HadoopStreaming.html">Hadoop Streaming</a>
    428. 

  428.             </li>
    429. 

  429.                   <li class="none">
    430. 

  430.                   <a href="../../hadoop-archives/HadoopArchives.html">Hadoop Archives</a>
    431. 

  431.             </li>
    432. 

  432.                   <li class="none">
    433. 

  433.                   <a href="../../hadoop-archive-logs/HadoopArchiveLogs.html">Hadoop Archive Logs</a>
    434. 

  434.             </li>
    435. 

  435.                   <li class="none">
    436. 

  436.                   <a href="../../hadoop-distcp/DistCp.html">DistCp</a>
    437. 

  437.             </li>
    438. 

  438.                   <li class="none">
    439. 

  439.                   <a href="../../hadoop-federation-balance/HDFSFederationBalance.html">HDFS Federation Balance</a>
    440. 

  440.             </li>
    441. 

  441.                   <li class="none">
    442. 

  442.                   <a href="../../hadoop-gridmix/GridMix.html">GridMix</a>
    443. 

  443.             </li>
    444. 

  444.                   <li class="none">
    445. 

  445.                   <a href="../../hadoop-rumen/Rumen.html">Rumen</a>
    446. 

  446.             </li>
    447. 

  447.                   <li class="none">
    448. 

  448.                   <a href="../../hadoop-resourceestimator/ResourceEstimator.html">Resource Estimator Service</a>
    449. 

  449.             </li>
    450. 

  450.                   <li class="none">
    451. 

  451.                   <a href="../../hadoop-sls/SchedulerLoadSimulator.html">Scheduler Load Simulator</a>
    452. 

  452.             </li>
    453. 

  453.                   <li class="none">
    454. 

  454.                   <a href="../../hadoop-project-dist/hadoop-common/Benchmarking.html">Hadoop Benchmarking</a>
    455. 

  455.             </li>
    456. 

  456.                   <li class="none">
    457. 

  457.                   <a href="../../hadoop-dynamometer/Dynamometer.html">Dynamometer</a>
    458. 

  458.             </li>
    459. 

  459.           </ul>
    460. 

  460.                        <h5>Reference</h5>
    461. 

  461.                   <ul>
    462. 

  462.                   <li class="none">
    463. 

  463.                   <a href="../../hadoop-project-dist/hadoop-common/release/">Changelog and Release Notes</a>
    464. 

  464.             </li>
    465. 

  465.                   <li class="none">
    466. 

  466.                   <a href="../../api/index.html">Java API docs</a>
    467. 

  467.             </li>
    468. 

  468.                   <li class="none">
    469. 

  469.                   <a href="../../hadoop-project-dist/hadoop-common/UnixShellAPI.html">Unix Shell API</a>
    470. 

  470.             </li>
    471. 

  471.                   <li class="none">
    472. 

  472.                   <a href="../../hadoop-project-dist/hadoop-common/Metrics.html">Metrics</a>
    473. 

  473.             </li>
    474. 

  474.           </ul>
    475. 

  475.                        <h5>Configuration</h5>
    476. 

  476.                   <ul>
    477. 

  477.                   <li class="none">
    478. 

  478.                   <a href="../../hadoop-project-dist/hadoop-common/core-default.xml">core-default.xml</a>
    479. 

  479.             </li>
    480. 

  480.                   <li class="none">
    481. 

  481.                   <a href="../../hadoop-project-dist/hadoop-hdfs/hdfs-default.xml">hdfs-default.xml</a>
    482. 

  482.             </li>
    483. 

  483.                   <li class="none">
    484. 

  484.                   <a href="../../hadoop-project-dist/hadoop-hdfs-rbf/hdfs-rbf-default.xml">hdfs-rbf-default.xml</a>
    485. 

  485.             </li>
    486. 

  486.                   <li class="none">
    487. 

  487.                   <a href="../../hadoop-mapreduce-client/hadoop-mapreduce-client-core/mapred-default.xml">mapred-default.xml</a>
    488. 

  488.             </li>
    489. 

  489.                   <li class="none">
    490. 

  490.                   <a href="../../hadoop-yarn/hadoop-yarn-common/yarn-default.xml">yarn-default.xml</a>
    491. 

  491.             </li>
    492. 

  492.                   <li class="none">
    493. 

  493.                   <a href="../../hadoop-kms/kms-default.html">kms-default.xml</a>
    494. 

  494.             </li>
    495. 

  495.                   <li class="none">
    496. 

  496.                   <a href="../../hadoop-hdfs-httpfs/httpfs-default.html">httpfs-default.xml</a>
    497. 

  497.             </li>
    498. 

  498.                   <li class="none">
    499. 

  499.                   <a href="../../hadoop-project-dist/hadoop-common/DeprecatedProperties.html">Deprecated Properties</a>
    500. 

  500.             </li>
    501. 

  501.           </ul>
    502. 

  502.                                  <a href="http://maven.apache.org/" title="Built by Maven" class="poweredBy">
    503. 

  503.           <img alt="Built by Maven" src="./images/logos/maven-feather.png"/>
    504. 

  504.         </a>
    505. 

  505.                        
    506. 

  506.                                </div>
    507. 

  507.     </div>
    508. 

  508.     <div id="bodyColumn">
    509. 

  509.       <div id="contentBox">
    510. 

  510.         <!---
    511. 

  511.   Licensed under the Apache License, Version 2.0 (the "License");
    512. 

  512.   you may not use this file except in compliance with the License.
    513. 

  513.   You may obtain a copy of the License at
    514. 

  514. 

  515.    http://www.apache.org/licenses/LICENSE-2.0
    516. 

  516. 

  517.   Unless required by applicable law or agreed to in writing, software
    518. 

  518.   distributed under the License is distributed on an "AS IS" BASIS,
    519. 

  519.   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    520. 

  520.   See the License for the specific language governing permissions and
    521. 

  521.   limitations under the License. See accompanying LICENSE file.
    522. 

  522. -->
    523. 

  523. <h1>MapReduce History Server REST API&#x2019;s.</h1>
    524. 

  524. <ul>
    525. 

  525. <li><a href="#Overview">Overview</a></li>
    526. 

  526. <li><a href="#History_Server_Information_API">History Server Information API</a>
    527. 

  527. <ul>
    528. 

  528. <li><a href="#URI">URI</a></li>
    529. 

  529. <li><a href="#HTTP_Operations_Supported">HTTP Operations Supported</a></li>
    530. 

  530. <li><a href="#Query_Parameters_Supported">Query Parameters Supported</a></li>
    531. 

  531. <li><a href="#Elements_of_the_historyInfo_object">Elements of the historyInfo object</a></li>
    532. 

  532. <li><a href="#Response_Examples">Response Examples</a></li></ul></li>
    533. 

  533. <li><a href="#MapReduce_API.E2.80.99s">MapReduce API&#x2019;s</a>
    534. 

  534. <ul>
    535. 

  535. <li><a href="#Jobs_API">Jobs API</a></li>
    536. 

  536. <li><a href="#Job_API">Job API</a></li>
    537. 

  537. <li><a href="#Elements_of_the_acls_object">Elements of the acls object</a></li>
    538. 

  538. <li><a href="#Job_Attempts_API">Job Attempts API</a></li>
    539. 

  539. <li><a href="#Job_Counters_API">Job Counters API</a></li>
    540. 

  540. <li><a href="#Job_Conf_API">Job Conf API</a></li>
    541. 

  541. <li><a href="#Tasks_API">Tasks API</a></li>
    542. 

  542. <li><a href="#Task_API">Task API</a></li>
    543. 

  543. <li><a href="#Task_Counters_API">Task Counters API</a></li>
    544. 

  544. <li><a href="#Task_Attempts_API">Task Attempts API</a></li>
    545. 

  545. <li><a href="#Task_Attempt_API">Task Attempt API</a></li>
    546. 

  546. <li><a href="#Task_Attempt_Counters_API">Task Attempt Counters API</a></li></ul></li></ul>
    547. 

  547. <section>
    548. 

  548. <h2><a name="Overview"></a>Overview</h2>
    549. 

  549. <p>The history server REST API&#x2019;s allow the user to get status on finished applications.</p></section><section>
    550. 

  550. <h2><a name="History_Server_Information_API"></a>History Server Information API</h2>
    551. 

  551. <p>The history server information resource provides overall information about the history server.</p><section>
    552. 

  552. <h3><a name="URI"></a>URI</h3>
    553. 

  553. <p>Both of the following URI&#x2019;s give you the history server information, from an application id identified by the appid value.</p>
    554. 

  554. <ul>
    555. 

  555. 

  556. <li><a class="externalLink" href="http://history-server-http-address:port/ws/v1/history">http://history-server-http-address:port/ws/v1/history</a>
    557. 

  557. <ul>
    558. 

  558. 

  559. <li><a class="externalLink" href="http://history-server-http-address:port/ws/v1/history/info">http://history-server-http-address:port/ws/v1/history/info</a></li>
    560. 

  560. </ul>
    561. 

  561. </li>
    562. 

  562. </ul></section><section>
    563. 

  563. <h3><a name="HTTP_Operations_Supported"></a>HTTP Operations Supported</h3>
    564. 

  564. <ul>
    565. 

  565. 

  566. <li>GET</li>
    567. 

  567. </ul></section><section>
    568. 

  568. <h3><a name="Query_Parameters_Supported"></a>Query Parameters Supported</h3>
    569. 

  569. 

  570. <div class="source">
    571. 

  571. <div class="source">
    572. 

  572. <pre>  None
    573. 

  573. </pre></div></div>
    574. 

  574. </section><section>
    575. 

  575. <h3><a name="Elements_of_the_historyInfo_object"></a>Elements of the <i>historyInfo</i> object</h3>
    576. 

  576. <table border="0" class="bodyTable">
    577. 

  577. <thead>
    578. 

  578. 

  579. <tr class="a">
    580. 

  580. <th align="left"> Item </th>
    581. 

  581. <th align="left"> Data Type </th>
    582. 

  582. <th align="left"> Description </th></tr>
    583. 

  583. </thead><tbody>
    584. 

  584. 

  585. <tr class="b">
    586. 

  586. <td align="left"> startedOn </td>
    587. 

  587. <td align="left"> long </td>
    588. 

  588. <td align="left"> The time the history server was started (in ms since epoch) </td></tr>
    589. 

  589. <tr class="a">
    590. 

  590. <td align="left"> hadoopVersion </td>
    591. 

  591. <td align="left"> string </td>
    592. 

  592. <td align="left"> Version of hadoop common </td></tr>
    593. 

  593. <tr class="b">
    594. 

  594. <td align="left"> hadoopBuildVersion </td>
    595. 

  595. <td align="left"> string </td>
    596. 

  596. <td align="left"> Hadoop common build string with build version, user, and checksum </td></tr>
    597. 

  597. <tr class="a">
    598. 

  598. <td align="left"> hadoopVersionBuiltOn </td>
    599. 

  599. <td align="left"> string </td>
    600. 

  600. <td align="left"> Timestamp when hadoop common was built </td></tr>
    601. 

  601. </tbody>
    602. 

  602. </table></section><section>
    603. 

  603. <h3><a name="Response_Examples"></a>Response Examples</h3>
    604. 

  604. <p><b>JSON response</b></p>
    605. 

  605. <p>HTTP Request:</p>
    606. 

  606. 

  607. <div class="source">
    608. 

  608. <div class="source">
    609. 

  609. <pre>  GET http://history-server-http-address:port/ws/v1/history/info
    610. 

  610. </pre></div></div>
    611. 

  611. 

  612. <p>Response Header:</p>
    613. 

  613. 

  614. <div class="source">
    615. 

  615. <div class="source">
    616. 

  616. <pre>  HTTP/1.1 200 OK
    617. 

  617.   Content-Type: application/json
    618. 

  618.   Transfer-Encoding: chunked
    619. 

  619.   Server: Jetty(6.1.26)
    620. 

  620. </pre></div></div>
    621. 

  621. 

  622. <p>Response Body:</p>
    623. 

  623. 

  624. <div class="source">
    625. 

  625. <div class="source">
    626. 

  626. <pre>{
    627. 

  627.    &quot;historyInfo&quot; : {
    628. 

  628.       &quot;startedOn&quot;:1353512830963,
    629. 

  629.       &quot;hadoopVersionBuiltOn&quot; : &quot;Wed Jan 11 21:18:36 UTC 2012&quot;,
    630. 

  630.       &quot;hadoopBuildVersion&quot; : &quot;0.23.1-SNAPSHOT from 1230253 by user1 source checksum bb6e554c6d50b0397d826081017437a7&quot;,
    631. 

  631.       &quot;hadoopVersion&quot; : &quot;0.23.1-SNAPSHOT&quot;
    632. 

  632.    }
    633. 

  633. }
    634. 

  634. </pre></div></div>
    635. 

  635. 

  636. <p><b>XML response</b></p>
    637. 

  637. <p>HTTP Request:</p>
    638. 

  638. 

  639. <div class="source">
    640. 

  640. <div class="source">
    641. 

  641. <pre>  GET http://history-server-http-address:port/ws/v1/history/info
    642. 

  642.   Accept: application/xml
    643. 

  643. </pre></div></div>
    644. 

  644. 

  645. <p>Response Header:</p>
    646. 

  646. 

  647. <div class="source">
    648. 

  648. <div class="source">
    649. 

  649. <pre>  HTTP/1.1 200 OK
    650. 

  650.   Content-Type: application/xml
    651. 

  651.   Content-Length: 330
    652. 

  652.   Server: Jetty(6.1.26)
    653. 

  653. </pre></div></div>
    654. 

  654. 

  655. <p>Response Body:</p>
    656. 

  656. 

  657. <div class="source">
    658. 

  658. <div class="source">
    659. 

  659. <pre>&lt;?xml version=&quot;1.0&quot; encoding=&quot;UTF-8&quot; standalone=&quot;yes&quot;?&gt;
    660. 

  660. &lt;historyInfo&gt;
    661. 

  661.   &lt;startedOn&gt;1353512830963&lt;/startedOn&gt;
    662. 

  662.   &lt;hadoopVersion&gt;0.23.1-SNAPSHOT&lt;/hadoopVersion&gt;
    663. 

  663.   &lt;hadoopBuildVersion&gt;0.23.1-SNAPSHOT from 1230253 by user1 source checksum bb6e554c6d50b0397d826081017437a7&lt;/hadoopBuildVersion&gt;
    664. 

  664.   &lt;hadoopVersionBuiltOn&gt;Wed Jan 11 21:18:36 UTC 2012&lt;/hadoopVersionBuiltOn&gt;
    665. 

  665. &lt;/historyInfo&gt;
    666. 

  666. </pre></div></div>
    667. 

  667. </section></section><section>
    668. 

  668. <h2><a name="MapReduce_API.E2.80.99s"></a>MapReduce API&#x2019;s</h2>
    669. 

  669. <p>The following list of resources apply to MapReduce.</p><section>
    670. 

  670. <h3><a name="Jobs_API"></a>Jobs API</h3>
    671. 

  671. <p>The jobs resource provides a list of the MapReduce jobs that have finished. It does not currently return a full list of parameters</p><section>
    672. 

  672. <h4><a name="URI"></a>URI</h4>
    673. 

  673. <ul>
    674. 

  674. 

  675. <li><a class="externalLink" href="http://history-server-http-address:port/ws/v1/history/mapreduce/jobs">http://history-server-http-address:port/ws/v1/history/mapreduce/jobs</a></li>
    676. 

  676. </ul></section><section>
    677. 

  677. <h4><a name="HTTP_Operations_Supported"></a>HTTP Operations Supported</h4>
    678. 

  678. <ul>
    679. 

  679. 

  680. <li>GET</li>
    681. 

  681. </ul></section><section>
    682. 

  682. <h4><a name="Query_Parameters_Supported"></a>Query Parameters Supported</h4>
    683. 

  683. <p>Multiple parameters can be specified. The started and finished times have a begin and end parameter to allow you to specify ranges. For example, one could request all jobs that started between 1:00am and 2:00pm on 12/19/2011 with startedTimeBegin=1324256400&amp;startedTimeEnd=1324303200. If the Begin parameter is not specfied, it defaults to 0, and if the End parameter is not specified, it defaults to infinity.</p>
    684. 

  684. <ul>
    685. 

  685. 

  686. <li>user - user name
    687. 

  687. <ul>
    688. 

  688. 

  689. <li>state - the job state</li>
    690. 

  690. <li>queue - queue name</li>
    691. 

  691. <li>limit - total number of app objects to be returned</li>
    692. 

  692. <li>startedTimeBegin - jobs with start time beginning with this time, specified in ms since epoch</li>
    693. 

  693. <li>startedTimeEnd - jobs with start time ending with this time, specified in ms since epoch</li>
    694. 

  694. <li>finishedTimeBegin - jobs with finish time beginning with this time, specified in ms since epoch</li>
    695. 

  695. <li>finishedTimeEnd - jobs with finish time ending with this time, specified in ms since epoch</li>
    696. 

  696. </ul>
    697. 

  697. </li>
    698. 

  698. </ul></section><section>
    699. 

  699. <h4><a name="Elements_of_the_jobs_object"></a>Elements of the <i>jobs</i> object</h4>
    700. 

  700. <p>When you make a request for the list of jobs, the information will be returned as an array of job objects. See also <a href="#Job_API">Job API</a> for syntax of the job object. Except this is a subset of a full job. Only startTime, finishTime, id, name, queue, user, state, mapsTotal, mapsCompleted, reducesTotal, and reducesCompleted are returned.</p>
    701. 

  701. <table border="0" class="bodyTable">
    702. 

  702. <thead>
    703. 

  703. 

  704. <tr class="a">
    705. 

  705. <th align="left"> Item </th>
    706. 

  706. <th align="left"> Data Type </th>
    707. 

  707. <th align="left"> Description </th></tr>
    708. 

  708. </thead><tbody>
    709. 

  709. 

  710. <tr class="b">
    711. 

  711. <td align="left"> job </td>
    712. 

  712. <td align="left"> array of job objects(json)/zero or more job objects(XML) </td>
    713. 

  713. <td align="left"> The collection of job objects </td></tr>
    714. 

  714. </tbody>
    715. 

  715. </table></section><section>
    716. 

  716. <h4><a name="Response_Examples"></a>Response Examples</h4>
    717. 

  717. <p><b>JSON response</b></p>
    718. 

  718. <p>HTTP Request:</p>
    719. 

  719. 

  720. <div class="source">
    721. 

  721. <div class="source">
    722. 

  722. <pre>  GET http://history-server-http-address:port/ws/v1/history/mapreduce/jobs
    723. 

  723. </pre></div></div>
    724. 

  724. 

  725. <p>Response Header:</p>
    726. 

  726. 

  727. <div class="source">
    728. 

  728. <div class="source">
    729. 

  729. <pre>  HTTP/1.1 200 OK
    730. 

  730.   Content-Type: application/json
    731. 

  731.   Transfer-Encoding: chunked
    732. 

  732.   Server: Jetty(6.1.26)
    733. 

  733. </pre></div></div>
    734. 

  734. 

  735. <p>Response Body:</p>
    736. 

  736. 

  737. <div class="source">
    738. 

  738. <div class="source">
    739. 

  739. <pre>{
    740. 

  740.    &quot;jobs&quot; : {
    741. 

  741.       &quot;job&quot; : [
    742. 

  742.          {
    743. 

  743.             &quot;submitTime&quot; : 1326381344449,
    744. 

  744.             &quot;state&quot; : &quot;SUCCEEDED&quot;,
    745. 

  745.             &quot;user&quot; : &quot;user1&quot;,
    746. 

  746.             &quot;reducesTotal&quot; : 1,
    747. 

  747.             &quot;mapsCompleted&quot; : 1,
    748. 

  748.             &quot;startTime&quot; : 1326381344489,
    749. 

  749.             &quot;id&quot; : &quot;job_1326381300833_1_1&quot;,
    750. 

  750.             &quot;name&quot; : &quot;word count&quot;,
    751. 

  751.             &quot;reducesCompleted&quot; : 1,
    752. 

  752.             &quot;mapsTotal&quot; : 1,
    753. 

  753.             &quot;queue&quot; : &quot;default&quot;,
    754. 

  754.             &quot;finishTime&quot; : 1326381356010
    755. 

  755.          },
    756. 

  756.          {
    757. 

  757.             &quot;submitTime&quot; : 1326381446500,
    758. 

  758.             &quot;state&quot; : &quot;SUCCEEDED&quot;,
    759. 

  759.             &quot;user&quot; : &quot;user1&quot;,
    760. 

  760.             &quot;reducesTotal&quot; : 1,
    761. 

  761.             &quot;mapsCompleted&quot; : 1,
    762. 

  762.             &quot;startTime&quot; : 1326381446529,
    763. 

  763.             &quot;id&quot; : &quot;job_1326381300833_2_2&quot;,
    764. 

  764.             &quot;name&quot; : &quot;Sleep job&quot;,
    765. 

  765.             &quot;reducesCompleted&quot; : 1,
    766. 

  766.             &quot;mapsTotal&quot; : 1,
    767. 

  767.             &quot;queue&quot; : &quot;default&quot;,
    768. 

  768.             &quot;finishTime&quot; : 1326381582106
    769. 

  769.          }
    770. 

  770.       ]
    771. 

  771.    }
    772. 

  772. }
    773. 

  773. </pre></div></div>
    774. 

  774. 

  775. <p><b>XML response</b></p>
    776. 

  776. <p>HTTP Request:</p>
    777. 

  777. 

  778. <div class="source">
    779. 

  779. <div class="source">
    780. 

  780. <pre>  GET http://history-server-http-address:port/ws/v1/history/mapreduce/jobs
    781. 

  781.   Accept: application/xml
    782. 

  782. </pre></div></div>
    783. 

  783. 

  784. <p>Response Header:</p>
    785. 

  785. 

  786. <div class="source">
    787. 

  787. <div class="source">
    788. 

  788. <pre>  HTTP/1.1 200 OK
    789. 

  789.   Content-Type: application/xml
    790. 

  790.   Content-Length: 1922
    791. 

  791.   Server: Jetty(6.1.26)
    792. 

  792. </pre></div></div>
    793. 

  793. 

  794. <p>Response Body:</p>
    795. 

  795. 

  796. <div class="source">
    797. 

  797. <div class="source">
    798. 

  798. <pre>&lt;?xml version=&quot;1.0&quot; encoding=&quot;UTF-8&quot; standalone=&quot;yes&quot;?&gt;
    799. 

  799. &lt;jobs&gt;
    800. 

  800.   &lt;job&gt;
    801. 

  801.     &lt;submitTime&gt;1326381344449&lt;/submitTime&gt;
    802. 

  802.     &lt;startTime&gt;1326381344489&lt;/startTime&gt;
    803. 

  803.     &lt;finishTime&gt;1326381356010&lt;/finishTime&gt;
    804. 

  804.     &lt;id&gt;job_1326381300833_1_1&lt;/id&gt;
    805. 

  805.     &lt;name&gt;word count&lt;/name&gt;
    806. 

  806.     &lt;queue&gt;default&lt;/queue&gt;
    807. 

  807.     &lt;user&gt;user1&lt;/user&gt;
    808. 

  808.     &lt;state&gt;SUCCEEDED&lt;/state&gt;
    809. 

  809.     &lt;mapsTotal&gt;1&lt;/mapsTotal&gt;
    810. 

  810.     &lt;mapsCompleted&gt;1&lt;/mapsCompleted&gt;
    811. 

  811.     &lt;reducesTotal&gt;1&lt;/reducesTotal&gt;
    812. 

  812.     &lt;reducesCompleted&gt;1&lt;/reducesCompleted&gt;
    813. 

  813.   &lt;/job&gt;
    814. 

  814.   &lt;job&gt;
    815. 

  815.     &lt;submitTime&gt;1326381446500&lt;/submitTime&gt;
    816. 

  816.     &lt;startTime&gt;1326381446529&lt;/startTime&gt;
    817. 

  817.     &lt;finishTime&gt;1326381582106&lt;/finishTime&gt;
    818. 

  818.     &lt;id&gt;job_1326381300833_2_2&lt;/id&gt;
    819. 

  819.     &lt;name&gt;Sleep job&lt;/name&gt;
    820. 

  820.     &lt;queue&gt;default&lt;/queue&gt;
    821. 

  821.     &lt;user&gt;user1&lt;/user&gt;
    822. 

  822.     &lt;state&gt;SUCCEEDED&lt;/state&gt;
    823. 

  823.     &lt;mapsTotal&gt;1&lt;/mapsTotal&gt;
    824. 

  824.     &lt;mapsCompleted&gt;1&lt;/mapsCompleted&gt;
    825. 

  825.     &lt;reducesTotal&gt;1&lt;/reducesTotal&gt;
    826. 

  826.     &lt;reducesCompleted&gt;1&lt;/reducesCompleted&gt;
    827. 

  827.   &lt;/job&gt;
    828. 

  828. &lt;/jobs&gt;
    829. 

  829. </pre></div></div>
    830. 

  830. </section></section><section>
    831. 

  831. <h3><a name="Job_API"></a>Job API</h3>
    832. 

  832. <p>A Job resource contains information about a particular job identified by jobid.</p><section>
    833. 

  833. <h4><a name="URI"></a>URI</h4>
    834. 

  834. <ul>
    835. 

  835. 

  836. <li><a class="externalLink" href="http://history-server-http-address:port/ws/v1/history/mapreduce/jobs/{jobid}">http://history-server-http-address:port/ws/v1/history/mapreduce/jobs/{jobid}</a></li>
    837. 

  837. </ul></section><section>
    838. 

  838. <h4><a name="HTTP_Operations_Supported"></a>HTTP Operations Supported</h4>
    839. 

  839. <ul>
    840. 

  840. 

  841. <li>GET</li>
    842. 

  842. </ul></section><section>
    843. 

  843. <h4><a name="Query_Parameters_Supported"></a>Query Parameters Supported</h4>
    844. 

  844. 

  845. <div class="source">
    846. 

  846. <div class="source">
    847. 

  847. <pre>  None
    848. 

  848. </pre></div></div>
    849. 

  849. </section><section>
    850. 

  850. <h4><a name="Elements_of_the_job_object"></a>Elements of the <i>job</i> object</h4>
    851. 

  851. <table border="0" class="bodyTable">
    852. 

  852. <thead>
    853. 

  853. 

  854. <tr class="a">
    855. 

  855. <th align="left"> Item </th>
    856. 

  856. <th align="left"> Data Type </th>
    857. 

  857. <th align="left"> Description </th></tr>
    858. 

  858. </thead><tbody>
    859. 

  859. 

  860. <tr class="b">
    861. 

  861. <td align="left"> id </td>
    862. 

  862. <td align="left"> string </td>
    863. 

  863. <td align="left"> The job id </td></tr>
    864. 

  864. <tr class="a">
    865. 

  865. <td align="left"> name </td>
    866. 

  866. <td align="left"> string </td>
    867. 

  867. <td align="left"> The job name </td></tr>
    868. 

  868. <tr class="b">
    869. 

  869. <td align="left"> queue </td>
    870. 

  870. <td align="left"> string </td>
    871. 

  871. <td align="left"> The queue the job was submitted to </td></tr>
    872. 

  872. <tr class="a">
    873. 

  873. <td align="left"> user </td>
    874. 

  874. <td align="left"> string </td>
    875. 

  875. <td align="left"> The user name </td></tr>
    876. 

  876. <tr class="b">
    877. 

  877. <td align="left"> state </td>
    878. 

  878. <td align="left"> string </td>
    879. 

  879. <td align="left"> the job state - valid values are: NEW, INITED, RUNNING, SUCCEEDED, FAILED, KILL_WAIT, KILLED, ERROR </td></tr>
    880. 

  880. <tr class="a">
    881. 

  881. <td align="left"> diagnostics </td>
    882. 

  882. <td align="left"> string </td>
    883. 

  883. <td align="left"> A diagnostic message </td></tr>
    884. 

  884. <tr class="b">
    885. 

  885. <td align="left"> submitTime </td>
    886. 

  886. <td align="left"> long </td>
    887. 

  887. <td align="left"> The time the job submitted (in ms since epoch) </td></tr>
    888. 

  888. <tr class="a">
    889. 

  889. <td align="left"> startTime </td>
    890. 

  890. <td align="left"> long </td>
    891. 

  891. <td align="left"> The time the job started (in ms since epoch) </td></tr>
    892. 

  892. <tr class="b">
    893. 

  893. <td align="left"> finishTime </td>
    894. 

  894. <td align="left"> long </td>
    895. 

  895. <td align="left"> The time the job finished (in ms since epoch) </td></tr>
    896. 

  896. <tr class="a">
    897. 

  897. <td align="left"> mapsTotal </td>
    898. 

  898. <td align="left"> int </td>
    899. 

  899. <td align="left"> The total number of maps </td></tr>
    900. 

  900. <tr class="b">
    901. 

  901. <td align="left"> mapsCompleted </td>
    902. 

  902. <td align="left"> int </td>
    903. 

  903. <td align="left"> The number of completed maps </td></tr>
    904. 

  904. <tr class="a">
    905. 

  905. <td align="left"> reducesTotal </td>
    906. 

  906. <td align="left"> int </td>
    907. 

  907. <td align="left"> The total number of reduces </td></tr>
    908. 

  908. <tr class="b">
    909. 

  909. <td align="left"> reducesCompleted </td>
    910. 

  910. <td align="left"> int </td>
    911. 

  911. <td align="left"> The number of completed reduces </td></tr>
    912. 

  912. <tr class="a">
    913. 

  913. <td align="left"> uberized </td>
    914. 

  914. <td align="left"> boolean </td>
    915. 

  915. <td align="left"> Indicates if the job was an uber job - ran completely in the application master </td></tr>
    916. 

  916. <tr class="b">
    917. 

  917. <td align="left"> avgMapTime </td>
    918. 

  918. <td align="left"> long </td>
    919. 

  919. <td align="left"> The average time of a map task (in ms) </td></tr>
    920. 

  920. <tr class="a">
    921. 

  921. <td align="left"> avgReduceTime </td>
    922. 

  922. <td align="left"> long </td>
    923. 

  923. <td align="left"> The average time of the reduce (in ms) </td></tr>
    924. 

  924. <tr class="b">
    925. 

  925. <td align="left"> avgShuffleTime </td>
    926. 

  926. <td align="left"> long </td>
    927. 

  927. <td align="left"> The average time of the shuffle (in ms) </td></tr>
    928. 

  928. <tr class="a">
    929. 

  929. <td align="left"> avgMergeTime </td>
    930. 

  930. <td align="left"> long </td>
    931. 

  931. <td align="left"> The average time of the merge (in ms) </td></tr>
    932. 

  932. <tr class="b">
    933. 

  933. <td align="left"> failedReduceAttempts </td>
    934. 

  934. <td align="left"> int </td>
    935. 

  935. <td align="left"> The number of failed reduce attempts </td></tr>
    936. 

  936. <tr class="a">
    937. 

  937. <td align="left"> killedReduceAttempts </td>
    938. 

  938. <td align="left"> int </td>
    939. 

  939. <td align="left"> The number of killed reduce attempts </td></tr>
    940. 

  940. <tr class="b">
    941. 

  941. <td align="left"> successfulReduceAttempts </td>
    942. 

  942. <td align="left"> int </td>
    943. 

  943. <td align="left"> The number of successful reduce attempts </td></tr>
    944. 

  944. <tr class="a">
    945. 

  945. <td align="left"> failedMapAttempts </td>
    946. 

  946. <td align="left"> int </td>
    947. 

  947. <td align="left"> The number of failed map attempts </td></tr>
    948. 

  948. <tr class="b">
    949. 

  949. <td align="left"> killedMapAttempts </td>
    950. 

  950. <td align="left"> int </td>
    951. 

  951. <td align="left"> The number of killed map attempts </td></tr>
    952. 

  952. <tr class="a">
    953. 

  953. <td align="left"> successfulMapAttempts </td>
    954. 

  954. <td align="left"> int </td>
    955. 

  955. <td align="left"> The number of successful map attempts </td></tr>
    956. 

  956. <tr class="b">
    957. 

  957. <td align="left"> acls </td>
    958. 

  958. <td align="left"> array of acls(json)/zero or more acls objects(xml) </td>
    959. 

  959. <td align="left"> A collection of acls objects </td></tr>
    960. 

  960. </tbody>
    961. 

  961. </table></section></section><section>
    962. 

  962. <h3><a name="Elements_of_the_acls_object"></a>Elements of the <i>acls</i> object</h3>
    963. 

  963. <table border="0" class="bodyTable">
    964. 

  964. <thead>
    965. 

  965. 

  966. <tr class="a">
    967. 

  967. <th align="left"> Item </th>
    968. 

  968. <th align="left"> Data Type </th>
    969. 

  969. <th align="left"> Description </th></tr>
    970. 

  970. </thead><tbody>
    971. 

  971. 

  972. <tr class="b">
    973. 

  973. <td align="left"> value </td>
    974. 

  974. <td align="left"> string </td>
    975. 

  975. <td align="left"> The acl value </td></tr>
    976. 

  976. <tr class="a">
    977. 

  977. <td align="left"> name </td>
    978. 

  978. <td align="left"> string </td>
    979. 

  979. <td align="left"> The acl name </td></tr>
    980. 

  980. </tbody>
    981. 

  981. </table><section>
    982. 

  982. <h4><a name="Response_Examples"></a>Response Examples</h4>
    983. 

  983. <p><b>JSON response</b></p>
    984. 

  984. <p>HTTP Request:</p>
    985. 

  985. 

  986. <div class="source">
    987. 

  987. <div class="source">
    988. 

  988. <pre>  GET http://history-server-http-address:port/ws/v1/history/mapreduce/jobs/job_1326381300833_2_2
    989. 

  989. </pre></div></div>
    990. 

  990. 

  991. <p>Response Header:</p>
    992. 

  992. 

  993. <div class="source">
    994. 

  994. <div class="source">
    995. 

  995. <pre>  HTTP/1.1 200 OK
    996. 

  996.   Content-Type: application/json
    997. 

  997.   Server: Jetty(6.1.26)
    998. 

  998.   Content-Length: 720
    999. 

  999. </pre></div></div>
    1000. 

  1000. 

  1001. <p>Response Body:</p>
    1002. 

  1002. 

  1003. <div class="source">
    1004. 

  1004. <div class="source">
    1005. 

  1005. <pre>{
    1006. 

  1006.    &quot;job&quot; : {
    1007. 

  1007.       &quot;submitTime&quot;:  1326381446500,
    1008. 

  1008.       &quot;avgReduceTime&quot; : 124961,
    1009. 

  1009.       &quot;failedReduceAttempts&quot; : 0,
    1010. 

  1010.       &quot;state&quot; : &quot;SUCCEEDED&quot;,
    1011. 

  1011.       &quot;successfulReduceAttempts&quot; : 1,
    1012. 

  1012.       &quot;acls&quot; : [
    1013. 

  1013.          {
    1014. 

  1014.             &quot;value&quot; : &quot; &quot;,
    1015. 

  1015.             &quot;name&quot; : &quot;mapreduce.job.acl-modify-job&quot;
    1016. 

  1016.          },
    1017. 

  1017.          {
    1018. 

  1018.             &quot;value&quot; : &quot; &quot;,
    1019. 

  1019.             &quot;name&quot; : &quot;mapreduce.job.acl-view-job&quot;
    1020. 

  1020.          }
    1021. 

  1021.       ],
    1022. 

  1022.       &quot;user&quot; : &quot;user1&quot;,
    1023. 

  1023.       &quot;reducesTotal&quot; : 1,
    1024. 

  1024.       &quot;mapsCompleted&quot; : 1,
    1025. 

  1025.       &quot;startTime&quot; : 1326381446529,
    1026. 

  1026.       &quot;id&quot; : &quot;job_1326381300833_2_2&quot;,
    1027. 

  1027.       &quot;avgMapTime&quot; : 2638,
    1028. 

  1028.       &quot;successfulMapAttempts&quot; : 1,
    1029. 

  1029.       &quot;name&quot; : &quot;Sleep job&quot;,
    1030. 

  1030.       &quot;avgShuffleTime&quot; : 2540,
    1031. 

  1031.       &quot;reducesCompleted&quot; : 1,
    1032. 

  1032.       &quot;diagnostics&quot; : &quot;&quot;,
    1033. 

  1033.       &quot;failedMapAttempts&quot; : 0,
    1034. 

  1034.       &quot;avgMergeTime&quot; : 2589,
    1035. 

  1035.       &quot;killedReduceAttempts&quot; : 0,
    1036. 

  1036.       &quot;mapsTotal&quot; : 1,
    1037. 

  1037.       &quot;queue&quot; : &quot;default&quot;,
    1038. 

  1038.       &quot;uberized&quot; : false,
    1039. 

  1039.       &quot;killedMapAttempts&quot; : 0,
    1040. 

  1040.       &quot;finishTime&quot; : 1326381582106
    1041. 

  1041.    }
    1042. 

  1042. }
    1043. 

  1043. </pre></div></div>
    1044. 

  1044. 

  1045. <p><b>XML response</b></p>
    1046. 

  1046. <p>HTTP Request:</p>
    1047. 

  1047. 

  1048. <div class="source">
    1049. 

  1049. <div class="source">
    1050. 

  1050. <pre>  GET http://history-server-http-address:port/ws/v1/history/mapreduce/jobs/job_1326381300833_2_2
    1051. 

  1051.   Accept: application/xml
    1052. 

  1052. </pre></div></div>
    1053. 

  1053. 

  1054. <p>Response Header:</p>
    1055. 

  1055. 

  1056. <div class="source">
    1057. 

  1057. <div class="source">
    1058. 

  1058. <pre>  HTTP/1.1 200 OK
    1059. 

  1059.   Content-Type: application/xml
    1060. 

  1060.   Content-Length: 983
    1061. 

  1061.   Server: Jetty(6.1.26)
    1062. 

  1062. </pre></div></div>
    1063. 

  1063. 

  1064. <p>Response Body:</p>
    1065. 

  1065. 

  1066. <div class="source">
    1067. 

  1067. <div class="source">
    1068. 

  1068. <pre>&lt;?xml version=&quot;1.0&quot; encoding=&quot;UTF-8&quot; standalone=&quot;yes&quot;?&gt;
    1069. 

  1069. &lt;job&gt;
    1070. 

  1070.   &lt;submitTime&gt;1326381446500&lt;/submitTime&gt;
    1071. 

  1071.   &lt;startTime&gt;1326381446529&lt;/startTime&gt;
    1072. 

  1072.   &lt;finishTime&gt;1326381582106&lt;/finishTime&gt;
    1073. 

  1073.   &lt;id&gt;job_1326381300833_2_2&lt;/id&gt;
    1074. 

  1074.   &lt;name&gt;Sleep job&lt;/name&gt;
    1075. 

  1075.   &lt;queue&gt;default&lt;/queue&gt;
    1076. 

  1076.   &lt;user&gt;user1&lt;/user&gt;
    1077. 

  1077.   &lt;state&gt;SUCCEEDED&lt;/state&gt;
    1078. 

  1078.   &lt;mapsTotal&gt;1&lt;/mapsTotal&gt;
    1079. 

  1079.   &lt;mapsCompleted&gt;1&lt;/mapsCompleted&gt;
    1080. 

  1080.   &lt;reducesTotal&gt;1&lt;/reducesTotal&gt;
    1081. 

  1081.   &lt;reducesCompleted&gt;1&lt;/reducesCompleted&gt;
    1082. 

  1082.   &lt;uberized&gt;false&lt;/uberized&gt;
    1083. 

  1083.   &lt;diagnostics/&gt;
    1084. 

  1084.   &lt;avgMapTime&gt;2638&lt;/avgMapTime&gt;
    1085. 

  1085.   &lt;avgReduceTime&gt;124961&lt;/avgReduceTime&gt;
    1086. 

  1086.   &lt;avgShuffleTime&gt;2540&lt;/avgShuffleTime&gt;
    1087. 

  1087.   &lt;avgMergeTime&gt;2589&lt;/avgMergeTime&gt;
    1088. 

  1088.   &lt;failedReduceAttempts&gt;0&lt;/failedReduceAttempts&gt;
    1089. 

  1089.   &lt;killedReduceAttempts&gt;0&lt;/killedReduceAttempts&gt;
    1090. 

  1090.   &lt;successfulReduceAttempts&gt;1&lt;/successfulReduceAttempts&gt;
    1091. 

  1091.   &lt;failedMapAttempts&gt;0&lt;/failedMapAttempts&gt;
    1092. 

  1092.   &lt;killedMapAttempts&gt;0&lt;/killedMapAttempts&gt;
    1093. 

  1093.   &lt;successfulMapAttempts&gt;1&lt;/successfulMapAttempts&gt;
    1094. 

  1094.   &lt;acls&gt;
    1095. 

  1095.     &lt;name&gt;mapreduce.job.acl-modify-job&lt;/name&gt;
    1096. 

  1096.     &lt;value&gt; &lt;/value&gt;
    1097. 

  1097.   &lt;/acls&gt;
    1098. 

  1098.   &lt;acls&gt;
    1099. 

  1099.     &lt;name&gt;mapreduce.job.acl-view-job&lt;/name&gt;
    1100. 

  1100.     &lt;value&gt; &lt;/value&gt;
    1101. 

  1101.   &lt;/acls&gt;
    1102. 

  1102. &lt;/job&gt;
    1103. 

  1103. </pre></div></div>
    1104. 

  1104. </section></section><section>
    1105. 

  1105. <h3><a name="Job_Attempts_API"></a>Job Attempts API</h3>
    1106. 

  1106. <p>With the job attempts API, you can obtain a collection of resources that represent a job attempt. When you run a GET operation on this resource, you obtain a collection of Job Attempt Objects.</p><section>
    1107. 

  1107. <h4><a name="URI"></a>URI</h4>
    1108. 

  1108. <ul>
    1109. 

  1109. 

  1110. <li><a class="externalLink" href="http://history-server-http-address:port/ws/v1/history/mapreduce/jobs/{jobid}/jobattempts">http://history-server-http-address:port/ws/v1/history/mapreduce/jobs/{jobid}/jobattempts</a></li>
    1111. 

  1111. </ul></section><section>
    1112. 

  1112. <h4><a name="HTTP_Operations_Supported"></a>HTTP Operations Supported</h4>
    1113. 

  1113. <ul>
    1114. 

  1114. 

  1115. <li>GET</li>
    1116. 

  1116. </ul></section><section>
    1117. 

  1117. <h4><a name="Query_Parameters_Supported"></a>Query Parameters Supported</h4>
    1118. 

  1118. 

  1119. <div class="source">
    1120. 

  1120. <div class="source">
    1121. 

  1121. <pre>  None
    1122. 

  1122. </pre></div></div>
    1123. 

  1123. </section><section>
    1124. 

  1124. <h4><a name="Elements_of_the_jobAttempts_object"></a>Elements of the <i>jobAttempts</i> object</h4>
    1125. 

  1125. <p>When you make a request for the list of job attempts, the information will be returned as an array of job attempt objects.</p>
    1126. 

  1126. <p>jobAttempts:</p>
    1127. 

  1127. <table border="0" class="bodyTable">
    1128. 

  1128. <thead>
    1129. 

  1129. 

  1130. <tr class="a">
    1131. 

  1131. <th align="left"> Item </th>
    1132. 

  1132. <th align="left"> Data Type </th>
    1133. 

  1133. <th align="left"> Description </th></tr>
    1134. 

  1134. </thead><tbody>
    1135. 

  1135. 

  1136. <tr class="b">
    1137. 

  1137. <td align="left"> jobAttempt </td>
    1138. 

  1138. <td align="left"> array of job attempt objects(JSON)/zero or more job attempt objects(XML) </td>
    1139. 

  1139. <td align="left"> The collection of job attempt objects </td></tr>
    1140. 

  1140. </tbody>
    1141. 

  1141. </table></section><section>
    1142. 

  1142. <h4><a name="Elements_of_the_jobAttempt_object"></a>Elements of the <i>jobAttempt</i> object</h4>
    1143. 

  1143. <table border="0" class="bodyTable">
    1144. 

  1144. <thead>
    1145. 

  1145. 

  1146. <tr class="a">
    1147. 

  1147. <th align="left"> Item </th>
    1148. 

  1148. <th align="left"> Data Type </th>
    1149. 

  1149. <th align="left"> Description </th></tr>
    1150. 

  1150. </thead><tbody>
    1151. 

  1151. 

  1152. <tr class="b">
    1153. 

  1153. <td align="left"> id </td>
    1154. 

  1154. <td align="left"> int </td>
    1155. 

  1155. <td align="left"> The job attempt id </td></tr>
    1156. 

  1156. <tr class="a">
    1157. 

  1157. <td align="left"> nodeId </td>
    1158. 

  1158. <td align="left"> string </td>
    1159. 

  1159. <td align="left"> The node id of the node the attempt ran on </td></tr>
    1160. 

  1160. <tr class="b">
    1161. 

  1161. <td align="left"> nodeHttpAddress </td>
    1162. 

  1162. <td align="left"> string </td>
    1163. 

  1163. <td align="left"> The node http address of the node the attempt ran on </td></tr>
    1164. 

  1164. <tr class="a">
    1165. 

  1165. <td align="left"> logsLink </td>
    1166. 

  1166. <td align="left"> string </td>
    1167. 

  1167. <td align="left"> The http link to the job attempt logs </td></tr>
    1168. 

  1168. <tr class="b">
    1169. 

  1169. <td align="left"> containerId </td>
    1170. 

  1170. <td align="left"> string </td>
    1171. 

  1171. <td align="left"> The id of the container for the job attempt </td></tr>
    1172. 

  1172. <tr class="a">
    1173. 

  1173. <td align="left"> startTime </td>
    1174. 

  1174. <td align="left"> long </td>
    1175. 

  1175. <td align="left"> The start time of the attempt (in ms since epoch) </td></tr>
    1176. 

  1176. </tbody>
    1177. 

  1177. </table></section><section>
    1178. 

  1178. <h4><a name="Response_Examples"></a>Response Examples</h4>
    1179. 

  1179. <p><b>JSON response</b></p>
    1180. 

  1180. <p>HTTP Request:</p>
    1181. 

  1181. 

  1182. <div class="source">
    1183. 

  1183. <div class="source">
    1184. 

  1184. <pre>  GET http://history-server-http-address:port/ws/v1/history/mapreduce/jobs/job_1326381300833_2_2/jobattempts
    1185. 

  1185. </pre></div></div>
    1186. 

  1186. 

  1187. <p>Response Header:</p>
    1188. 

  1188. 

  1189. <div class="source">
    1190. 

  1190. <div class="source">
    1191. 

  1191. <pre>  HTTP/1.1 200 OK
    1192. 

  1192.   Content-Type: application/json
    1193. 

  1193.   Transfer-Encoding: chunked
    1194. 

  1194.   Server: Jetty(6.1.26)
    1195. 

  1195. </pre></div></div>
    1196. 

  1196. 

  1197. <p>Response Body:</p>
    1198. 

  1198. 

  1199. <div class="source">
    1200. 

  1200. <div class="source">
    1201. 

  1201. <pre>{
    1202. 

  1202.    &quot;jobAttempts&quot; : {
    1203. 

  1203.       &quot;jobAttempt&quot; : [
    1204. 

  1204.          {
    1205. 

  1205.             &quot;nodeId&quot; : &quot;host.domain.com:8041&quot;,
    1206. 

  1206.             &quot;nodeHttpAddress&quot; : &quot;host.domain.com:8042&quot;,
    1207. 

  1207.             &quot;startTime&quot; : 1326381444693,
    1208. 

  1208.             &quot;id&quot; : 1,
    1209. 

  1209.             &quot;logsLink&quot; : &quot;http://host.domain.com:19888/jobhistory/logs/host.domain.com:8041/container_1326381300833_0002_01_000001/job_1326381300833_2_2/user1&quot;,
    1210. 

  1210.             &quot;containerId&quot; : &quot;container_1326381300833_0002_01_000001&quot;
    1211. 

  1211.          }
    1212. 

  1212.       ]
    1213. 

  1213.    }
    1214. 

  1214. }
    1215. 

  1215. </pre></div></div>
    1216. 

  1216. 

  1217. <p><b>XML response</b></p>
    1218. 

  1218. <p>HTTP Request:</p>
    1219. 

  1219. 

  1220. <div class="source">
    1221. 

  1221. <div class="source">
    1222. 

  1222. <pre>  GET http://history-server-http-address:port/ws/v1/history/mapreduce/jobs/job_1326381300833_2_2/jobattmpts
    1223. 

  1223.   Accept: application/xml
    1224. 

  1224. </pre></div></div>
    1225. 

  1225. 

  1226. <p>Response Header:</p>
    1227. 

  1227. 

  1228. <div class="source">
    1229. 

  1229. <div class="source">
    1230. 

  1230. <pre>  HTTP/1.1 200 OK
    1231. 

  1231.   Content-Type: application/xml
    1232. 

  1232.   Content-Length: 575
    1233. 

  1233.   Server: Jetty(6.1.26)
    1234. 

  1234. </pre></div></div>
    1235. 

  1235. 

  1236. <p>Response Body:</p>
    1237. 

  1237. 

  1238. <div class="source">
    1239. 

  1239. <div class="source">
    1240. 

  1240. <pre>&lt;?xml version=&quot;1.0&quot; encoding=&quot;UTF-8&quot; standalone=&quot;yes&quot;?&gt;
    1241. 

  1241. &lt;jobAttempts&gt;
    1242. 

  1242.   &lt;jobAttempt&gt;
    1243. 

  1243.     &lt;nodeHttpAddress&gt;host.domain.com:8042&lt;/nodeHttpAddress&gt;
    1244. 

  1244.     &lt;nodeId&gt;host.domain.com:8041&lt;/nodeId&gt;
    1245. 

  1245.     &lt;id&gt;1&lt;/id&gt;
    1246. 

  1246.     &lt;startTime&gt;1326381444693&lt;/startTime&gt;
    1247. 

  1247.     &lt;containerId&gt;container_1326381300833_0002_01_000001&lt;/containerId&gt;
    1248. 

  1248.     &lt;logsLink&gt;http://host.domain.com:19888/jobhistory/logs/host.domain.com:8041/container_1326381300833_0002_01_000001/job_1326381300833_2_2/user1&lt;/logsLink&gt;
    1249. 

  1249.   &lt;/jobAttempt&gt;
    1250. 

  1250. &lt;/jobAttempts&gt;
    1251. 

  1251. </pre></div></div>
    1252. 

  1252. </section></section><section>
    1253. 

  1253. <h3><a name="Job_Counters_API"></a>Job Counters API</h3>
    1254. 

  1254. <p>With the job counters API, you can object a collection of resources that represent al the counters for that job.</p><section>
    1255. 

  1255. <h4><a name="URI"></a>URI</h4>
    1256. 

  1256. <ul>
    1257. 

  1257. 

  1258. <li><a class="externalLink" href="http://history-server-http-address:port/ws/v1/history/mapreduce/jobs/{jobid}/counters">http://history-server-http-address:port/ws/v1/history/mapreduce/jobs/{jobid}/counters</a></li>
    1259. 

  1259. </ul></section><section>
    1260. 

  1260. <h4><a name="HTTP_Operations_Supported"></a>HTTP Operations Supported</h4>
    1261. 

  1261. <ul>
    1262. 

  1262. 

  1263. <li>GET</li>
    1264. 

  1264. </ul></section><section>
    1265. 

  1265. <h4><a name="Query_Parameters_Supported"></a>Query Parameters Supported</h4>
    1266. 

  1266. 

  1267. <div class="source">
    1268. 

  1268. <div class="source">
    1269. 

  1269. <pre>  None
    1270. 

  1270. </pre></div></div>
    1271. 

  1271. </section><section>
    1272. 

  1272. <h4><a name="Elements_of_the_jobCounters_object"></a>Elements of the <i>jobCounters</i> object</h4>
    1273. 

  1273. <table border="0" class="bodyTable">
    1274. 

  1274. <thead>
    1275. 

  1275. 

  1276. <tr class="a">
    1277. 

  1277. <th align="left"> Item </th>
    1278. 

  1278. <th align="left"> Data Type </th>
    1279. 

  1279. <th align="left"> Description </th></tr>
    1280. 

  1280. </thead><tbody>
    1281. 

  1281. 

  1282. <tr class="b">
    1283. 

  1283. <td align="left"> id </td>
    1284. 

  1284. <td align="left"> string </td>
    1285. 

  1285. <td align="left"> The job id </td></tr>
    1286. 

  1286. <tr class="a">
    1287. 

  1287. <td align="left"> counterGroup </td>
    1288. 

  1288. <td align="left"> array of counterGroup objects(JSON)/zero or more counterGroup objects(XML) </td>
    1289. 

  1289. <td align="left"> A collection of counter group objects </td></tr>
    1290. 

  1290. </tbody>
    1291. 

  1291. </table></section><section>
    1292. 

  1292. <h4><a name="Elements_of_the_counterGroup_objecs"></a>Elements of the <i>counterGroup</i> objecs</h4>
    1293. 

  1293. <table border="0" class="bodyTable">
    1294. 

  1294. <thead>
    1295. 

  1295. 

  1296. <tr class="a">
    1297. 

  1297. <th align="left"> Item </th>
    1298. 

  1298. <th align="left"> Data Type </th>
    1299. 

  1299. <th align="left"> Description </th></tr>
    1300. 

  1300. </thead><tbody>
    1301. 

  1301. 

  1302. <tr class="b">
    1303. 

  1303. <td align="left"> counterGroupName </td>
    1304. 

  1304. <td align="left"> string </td>
    1305. 

  1305. <td align="left"> The name of the counter group </td></tr>
    1306. 

  1306. <tr class="a">
    1307. 

  1307. <td align="left"> counter </td>
    1308. 

  1308. <td align="left"> array of counter objects(JSON)/zero or more counter objects(XML) </td>
    1309. 

  1309. <td align="left"> A collection of counter objects </td></tr>
    1310. 

  1310. </tbody>
    1311. 

  1311. </table></section><section>
    1312. 

  1312. <h4><a name="Elements_of_the_counter_object"></a>Elements of the <i>counter</i> object</h4>
    1313. 

  1313. <table border="0" class="bodyTable">
    1314. 

  1314. <thead>
    1315. 

  1315. 

  1316. <tr class="a">
    1317. 

  1317. <th align="left"> Item </th>
    1318. 

  1318. <th align="left"> Data Type </th>
    1319. 

  1319. <th align="left"> Description </th></tr>
    1320. 

  1320. </thead><tbody>
    1321. 

  1321. 

  1322. <tr class="b">
    1323. 

  1323. <td align="left"> name </td>
    1324. 

  1324. <td align="left"> string </td>
    1325. 

  1325. <td align="left"> The name of the counter </td></tr>
    1326. 

  1326. <tr class="a">
    1327. 

  1327. <td align="left"> reduceCounterValue </td>
    1328. 

  1328. <td align="left"> long </td>
    1329. 

  1329. <td align="left"> The counter value of reduce tasks </td></tr>
    1330. 

  1330. <tr class="b">
    1331. 

  1331. <td align="left"> mapCounterValue </td>
    1332. 

  1332. <td align="left"> long </td>
    1333. 

  1333. <td align="left"> The counter value of map tasks </td></tr>
    1334. 

  1334. <tr class="a">
    1335. 

  1335. <td align="left"> totalCounterValue </td>
    1336. 

  1336. <td align="left"> long </td>
    1337. 

  1337. <td align="left"> The counter value of all tasks </td></tr>
    1338. 

  1338. </tbody>
    1339. 

  1339. </table></section><section>
    1340. 

  1340. <h4><a name="Response_Examples"></a>Response Examples</h4>
    1341. 

  1341. <p><b>JSON response</b></p>
    1342. 

  1342. <p>HTTP Request:</p>
    1343. 

  1343. 

  1344. <div class="source">
    1345. 

  1345. <div class="source">
    1346. 

  1346. <pre>  GET http://history-server-http-address:port/ws/v1/history/mapreduce/jobs/job_1326381300833_2_2/counters
    1347. 

  1347. </pre></div></div>
    1348. 

  1348. 

  1349. <p>Response Header:</p>
    1350. 

  1350. 

  1351. <div class="source">
    1352. 

  1352. <div class="source">
    1353. 

  1353. <pre>  HTTP/1.1 200 OK
    1354. 

  1354.   Content-Type: application/json
    1355. 

  1355.   Transfer-Encoding: chunked
    1356. 

  1356.   Server: Jetty(6.1.26)
    1357. 

  1357. </pre></div></div>
    1358. 

  1358. 

  1359. <p>Response Body:</p>
    1360. 

  1360. 

  1361. <div class="source">
    1362. 

  1362. <div class="source">
    1363. 

  1363. <pre>{
    1364. 

  1364.    &quot;jobCounters&quot; : {
    1365. 

  1365.       &quot;id&quot; : &quot;job_1326381300833_2_2&quot;,
    1366. 

  1366.       &quot;counterGroup&quot; : [
    1367. 

  1367.          {
    1368. 

  1368.             &quot;counterGroupName&quot; : &quot;Shuffle Errors&quot;,
    1369. 

  1369.             &quot;counter&quot; : [
    1370. 

  1370.                {
    1371. 

  1371.                   &quot;reduceCounterValue&quot; : 0,
    1372. 

  1372.                   &quot;mapCounterValue&quot; : 0,
    1373. 

  1373.                   &quot;totalCounterValue&quot; : 0,
    1374. 

  1374.                   &quot;name&quot; : &quot;BAD_ID&quot;
    1375. 

  1375.                },
    1376. 

  1376.                {
    1377. 

  1377.                   &quot;reduceCounterValue&quot; : 0,
    1378. 

  1378.                   &quot;mapCounterValue&quot; : 0,
    1379. 

  1379.                   &quot;totalCounterValue&quot; : 0,
    1380. 

  1380.                   &quot;name&quot; : &quot;CONNECTION&quot;
    1381. 

  1381.                },
    1382. 

  1382.                {
    1383. 

  1383.                   &quot;reduceCounterValue&quot; : 0,
    1384. 

  1384.                   &quot;mapCounterValue&quot; : 0,
    1385. 

  1385.                   &quot;totalCounterValue&quot; : 0,
    1386. 

  1386.                   &quot;name&quot; : &quot;IO_ERROR&quot;
    1387. 

  1387.                },
    1388. 

  1388.                {
    1389. 

  1389.                   &quot;reduceCounterValue&quot; : 0,
    1390. 

  1390.                   &quot;mapCounterValue&quot; : 0,
    1391. 

  1391.                   &quot;totalCounterValue&quot; : 0,
    1392. 

  1392.                   &quot;name&quot; : &quot;WRONG_LENGTH&quot;
    1393. 

  1393.                },
    1394. 

  1394.                {
    1395. 

  1395.                   &quot;reduceCounterValue&quot; : 0,
    1396. 

  1396.                   &quot;mapCounterValue&quot; : 0,
    1397. 

  1397.                   &quot;totalCounterValue&quot; : 0,
    1398. 

  1398.                   &quot;name&quot; : &quot;WRONG_MAP&quot;
    1399. 

  1399.                },
    1400. 

  1400.                {
    1401. 

  1401.                   &quot;reduceCounterValue&quot; : 0,
    1402. 

  1402.                   &quot;mapCounterValue&quot; : 0,
    1403. 

  1403.                   &quot;totalCounterValue&quot; : 0,
    1404. 

  1404.                   &quot;name&quot; : &quot;WRONG_REDUCE&quot;
    1405. 

  1405.                }
    1406. 

  1406.             ]
    1407. 

  1407.           },
    1408. 

  1408.          {
    1409. 

  1409.             &quot;counterGroupName&quot; : &quot;org.apache.hadoop.mapreduce.FileSystemCounter&quot;,
    1410. 

  1410.             &quot;counter&quot; : [
    1411. 

  1411.                {
    1412. 

  1412.                   &quot;reduceCounterValue&quot; : 0,
    1413. 

  1413.                   &quot;mapCounterValue&quot; : 0,
    1414. 

  1414.                   &quot;totalCounterValue&quot; : 2483,
    1415. 

  1415.                   &quot;name&quot; : &quot;FILE_BYTES_READ&quot;
    1416. 

  1416.                },
    1417. 

  1417.                {
    1418. 

  1418.                   &quot;reduceCounterValue&quot; : 0,
    1419. 

  1419.                   &quot;mapCounterValue&quot; : 0,
    1420. 

  1420.                   &quot;totalCounterValue&quot; : 108525,
    1421. 

  1421.                   &quot;name&quot; : &quot;FILE_BYTES_WRITTEN&quot;
    1422. 

  1422.                },
    1423. 

  1423.                {
    1424. 

  1424.                   &quot;reduceCounterValue&quot; : 0,
    1425. 

  1425.                   &quot;mapCounterValue&quot; : 0,
    1426. 

  1426.                   &quot;totalCounterValue&quot; : 0,
    1427. 

  1427.                   &quot;name&quot; : &quot;FILE_READ_OPS&quot;
    1428. 

  1428.                },
    1429. 

  1429.                {
    1430. 

  1430.                   &quot;reduceCounterValue&quot; : 0,
    1431. 

  1431.                   &quot;mapCounterValue&quot; : 0,
    1432. 

  1432.                   &quot;totalCounterValue&quot; : 0,
    1433. 

  1433.                   &quot;name&quot; : &quot;FILE_LARGE_READ_OPS&quot;
    1434. 

  1434.                },
    1435. 

  1435.                {
    1436. 

  1436.                   &quot;reduceCounterValue&quot; : 0,
    1437. 

  1437.                   &quot;mapCounterValue&quot; : 0,
    1438. 

  1438.                   &quot;totalCounterValue&quot; : 0,
    1439. 

  1439.                   &quot;name&quot; : &quot;FILE_WRITE_OPS&quot;
    1440. 

  1440.                },
    1441. 

  1441.                {
    1442. 

  1442.                   &quot;reduceCounterValue&quot; : 0,
    1443. 

  1443.                   &quot;mapCounterValue&quot; : 0,
    1444. 

  1444.                   &quot;totalCounterValue&quot; : 48,
    1445. 

  1445.                   &quot;name&quot; : &quot;HDFS_BYTES_READ&quot;
    1446. 

  1446.                },
    1447. 

  1447.                {
    1448. 

  1448.                   &quot;reduceCounterValue&quot; : 0,
    1449. 

  1449.                   &quot;mapCounterValue&quot; : 0,
    1450. 

  1450.                   &quot;totalCounterValue&quot; : 0,
    1451. 

  1451.                   &quot;name&quot; : &quot;HDFS_BYTES_WRITTEN&quot;
    1452. 

  1452.                },
    1453. 

  1453.                {
    1454. 

  1454.                   &quot;reduceCounterValue&quot; : 0,
    1455. 

  1455.                   &quot;mapCounterValue&quot; : 0,
    1456. 

  1456.                   &quot;totalCounterValue&quot; : 1,
    1457. 

  1457.                   &quot;name&quot; : &quot;HDFS_READ_OPS&quot;
    1458. 

  1458.                },
    1459. 

  1459.                {
    1460. 

  1460.                   &quot;reduceCounterValue&quot; : 0,
    1461. 

  1461.                   &quot;mapCounterValue&quot; : 0,
    1462. 

  1462.                   &quot;totalCounterValue&quot; : 0,
    1463. 

  1463.                   &quot;name&quot; : &quot;HDFS_LARGE_READ_OPS&quot;
    1464. 

  1464.                },
    1465. 

  1465.                {
    1466. 

  1466.                   &quot;reduceCounterValue&quot; : 0,
    1467. 

  1467.                   &quot;mapCounterValue&quot; : 0,
    1468. 

  1468.                   &quot;totalCounterValue&quot; : 0,
    1469. 

  1469.                   &quot;name&quot; : &quot;HDFS_WRITE_OPS&quot;
    1470. 

  1470.                }
    1471. 

  1471.             ]
    1472. 

  1472.          },
    1473. 

  1473.          {
    1474. 

  1474.             &quot;counterGroupName&quot; : &quot;org.apache.hadoop.mapreduce.TaskCounter&quot;,
    1475. 

  1475.             &quot;counter&quot; : [
    1476. 

  1476.                {
    1477. 

  1477.                   &quot;reduceCounterValue&quot; : 0,
    1478. 

  1478.                   &quot;mapCounterValue&quot; : 0,
    1479. 

  1479.                   &quot;totalCounterValue&quot; : 1,
    1480. 

  1480.                   &quot;name&quot; : &quot;MAP_INPUT_RECORDS&quot;
    1481. 

  1481.                },
    1482. 

  1482.                {
    1483. 

  1483.                   &quot;reduceCounterValue&quot; : 0,
    1484. 

  1484.                   &quot;mapCounterValue&quot; : 0,
    1485. 

  1485.                   &quot;totalCounterValue&quot; : 1200,
    1486. 

  1486.                   &quot;name&quot; : &quot;MAP_OUTPUT_RECORDS&quot;
    1487. 

  1487.                },
    1488. 

  1488.                {
    1489. 

  1489.                   &quot;reduceCounterValue&quot; : 0,
    1490. 

  1490.                   &quot;mapCounterValue&quot; : 0,
    1491. 

  1491.                   &quot;totalCounterValue&quot; : 4800,
    1492. 

  1492.                   &quot;name&quot; : &quot;MAP_OUTPUT_BYTES&quot;
    1493. 

  1493.                },
    1494. 

  1494.                {
    1495. 

  1495.                   &quot;reduceCounterValue&quot; : 0,
    1496. 

  1496.                   &quot;mapCounterValue&quot; : 0,
    1497. 

  1497.                   &quot;totalCounterValue&quot; : 2235,
    1498. 

  1498.                   &quot;name&quot; : &quot;MAP_OUTPUT_MATERIALIZED_BYTES&quot;
    1499. 

  1499.                },
    1500. 

  1500.                {
    1501. 

  1501.                   &quot;reduceCounterValue&quot; : 0,
    1502. 

  1502.                   &quot;mapCounterValue&quot; : 0,
    1503. 

  1503.                   &quot;totalCounterValue&quot; : 48,
    1504. 

  1504.                   &quot;name&quot; : &quot;SPLIT_RAW_BYTES&quot;
    1505. 

  1505.                },
    1506. 

  1506.                {
    1507. 

  1507.                   &quot;reduceCounterValue&quot; : 0,
    1508. 

  1508.                   &quot;mapCounterValue&quot; : 0,
    1509. 

  1509.                   &quot;totalCounterValue&quot; : 0,
    1510. 

  1510.                   &quot;name&quot; : &quot;COMBINE_INPUT_RECORDS&quot;
    1511. 

  1511.                },
    1512. 

  1512.                {
    1513. 

  1513.                   &quot;reduceCounterValue&quot; : 0,
    1514. 

  1514.                   &quot;mapCounterValue&quot; : 0,
    1515. 

  1515.                   &quot;totalCounterValue&quot; : 0,
    1516. 

  1516.                   &quot;name&quot; : &quot;COMBINE_OUTPUT_RECORDS&quot;
    1517. 

  1517.                },
    1518. 

  1518.                {
    1519. 

  1519.                   &quot;reduceCounterValue&quot; : 0,
    1520. 

  1520.                   &quot;mapCounterValue&quot; : 0,
    1521. 

  1521.                   &quot;totalCounterValue&quot; : 1200,
    1522. 

  1522.                   &quot;name&quot; : &quot;REDUCE_INPUT_GROUPS&quot;
    1523. 

  1523.                },
    1524. 

  1524.                {
    1525. 

  1525.                   &quot;reduceCounterValue&quot; : 0,
    1526. 

  1526.                   &quot;mapCounterValue&quot; : 0,
    1527. 

  1527.                   &quot;totalCounterValue&quot; : 2235,
    1528. 

  1528.                   &quot;name&quot; : &quot;REDUCE_SHUFFLE_BYTES&quot;
    1529. 

  1529.                },
    1530. 

  1530.                {
    1531. 

  1531.                   &quot;reduceCounterValue&quot; : 0,
    1532. 

  1532.                   &quot;mapCounterValue&quot; : 0,
    1533. 

  1533.                   &quot;totalCounterValue&quot; : 1200,
    1534. 

  1534.                   &quot;name&quot; : &quot;REDUCE_INPUT_RECORDS&quot;
    1535. 

  1535.                },
    1536. 

  1536.                {
    1537. 

  1537.                   &quot;reduceCounterValue&quot; : 0,
    1538. 

  1538.                   &quot;mapCounterValue&quot; : 0,
    1539. 

  1539.                   &quot;totalCounterValue&quot; : 0,
    1540. 

  1540.                   &quot;name&quot; : &quot;REDUCE_OUTPUT_RECORDS&quot;
    1541. 

  1541.                },
    1542. 

  1542.                {
    1543. 

  1543.                   &quot;reduceCounterValue&quot; : 0,
    1544. 

  1544.                   &quot;mapCounterValue&quot; : 0,
    1545. 

  1545.                   &quot;totalCounterValue&quot; : 2400,
    1546. 

  1546.                   &quot;name&quot; : &quot;SPILLED_RECORDS&quot;
    1547. 

  1547.                },
    1548. 

  1548.                {
    1549. 

  1549.                   &quot;reduceCounterValue&quot; : 0,
    1550. 

  1550.                   &quot;mapCounterValue&quot; : 0,
    1551. 

  1551.                   &quot;totalCounterValue&quot; : 1,
    1552. 

  1552.                   &quot;name&quot; : &quot;SHUFFLED_MAPS&quot;
    1553. 

  1553.                },
    1554. 

  1554.                {
    1555. 

  1555.                   &quot;reduceCounterValue&quot; : 0,
    1556. 

  1556.                   &quot;mapCounterValue&quot; : 0,
    1557. 

  1557.                   &quot;totalCounterValue&quot; : 0,
    1558. 

  1558.                   &quot;name&quot; : &quot;FAILED_SHUFFLE&quot;
    1559. 

  1559.                },
    1560. 

  1560.                {
    1561. 

  1561.                   &quot;reduceCounterValue&quot; : 0,
    1562. 

  1562.                   &quot;mapCounterValue&quot; : 0,
    1563. 

  1563.                   &quot;totalCounterValue&quot; : 1,
    1564. 

  1564.                   &quot;name&quot; : &quot;MERGED_MAP_OUTPUTS&quot;
    1565. 

  1565.                },
    1566. 

  1566.                {
    1567. 

  1567.                   &quot;reduceCounterValue&quot; : 0,
    1568. 

  1568.                   &quot;mapCounterValue&quot; : 0,
    1569. 

  1569.                   &quot;totalCounterValue&quot; : 113,
    1570. 

  1570.                   &quot;name&quot; : &quot;GC_TIME_MILLIS&quot;
    1571. 

  1571.                },
    1572. 

  1572.                {
    1573. 

  1573.                   &quot;reduceCounterValue&quot; : 0,
    1574. 

  1574.                   &quot;mapCounterValue&quot; : 0,
    1575. 

  1575.                   &quot;totalCounterValue&quot; : 1830,
    1576. 

  1576.                   &quot;name&quot; : &quot;CPU_MILLISECONDS&quot;
    1577. 

  1577.                },
    1578. 

  1578.                {
    1579. 

  1579.                   &quot;reduceCounterValue&quot; : 0,
    1580. 

  1580.                   &quot;mapCounterValue&quot; : 0,
    1581. 

  1581.                   &quot;totalCounterValue&quot; : 478068736,
    1582. 

  1582.                   &quot;name&quot; : &quot;PHYSICAL_MEMORY_BYTES&quot;
    1583. 

  1583.                },
    1584. 

  1584.                {
    1585. 

  1585.                   &quot;reduceCounterValue&quot; : 0,
    1586. 

  1586.                   &quot;mapCounterValue&quot; : 0,
    1587. 

  1587.                   &quot;totalCounterValue&quot; : 2159284224,
    1588. 

  1588.                   &quot;name&quot; : &quot;VIRTUAL_MEMORY_BYTES&quot;
    1589. 

  1589.                },
    1590. 

  1590.                {
    1591. 

  1591.                   &quot;reduceCounterValue&quot; : 0,
    1592. 

  1592.                   &quot;mapCounterValue&quot; : 0,
    1593. 

  1593.                   &quot;totalCounterValue&quot; : 378863616,
    1594. 

  1594.                   &quot;name&quot; : &quot;COMMITTED_HEAP_BYTES&quot;
    1595. 

  1595.                }
    1596. 

  1596.             ]
    1597. 

  1597.          },
    1598. 

  1598.          {
    1599. 

  1599.             &quot;counterGroupName&quot; : &quot;org.apache.hadoop.mapreduce.lib.input.FileInputFormatCounter&quot;,
    1600. 

  1600.             &quot;counter&quot; : [
    1601. 

  1601.                {
    1602. 

  1602.                   &quot;reduceCounterValue&quot; : 0,
    1603. 

  1603.                   &quot;mapCounterValue&quot; : 0,
    1604. 

  1604.                   &quot;totalCounterValue&quot; : 0,
    1605. 

  1605.                   &quot;name&quot; : &quot;BYTES_READ&quot;
    1606. 

  1606.                }
    1607. 

  1607.             ]
    1608. 

  1608.          },
    1609. 

  1609.          {
    1610. 

  1610.             &quot;counterGroupName&quot; : &quot;org.apache.hadoop.mapreduce.lib.output.FileOutputFormatCounter&quot;,
    1611. 

  1611.             &quot;counter&quot; : [
    1612. 

  1612.                {
    1613. 

  1613.                   &quot;reduceCounterValue&quot; : 0,
    1614. 

  1614.                   &quot;mapCounterValue&quot; : 0,
    1615. 

  1615.                   &quot;totalCounterValue&quot; : 0,
    1616. 

  1616.                   &quot;name&quot; : &quot;BYTES_WRITTEN&quot;
    1617. 

  1617.                }
    1618. 

  1618.             ]
    1619. 

  1619.          }
    1620. 

  1620.       ]
    1621. 

  1621.    }
    1622. 

  1622. }
    1623. 

  1623. </pre></div></div>
    1624. 

  1624. 

  1625. <p><b>XML response</b></p>
    1626. 

  1626. <p>HTTP Request:</p>
    1627. 

  1627. 

  1628. <div class="source">
    1629. 

  1629. <div class="source">
    1630. 

  1630. <pre>  GET http://history-server-http-address:port/ws/v1/history/mapreduce/jobs/job_1326381300833_2_2/counters
    1631. 

  1631.   Accept: application/xml
    1632. 

  1632. </pre></div></div>
    1633. 

  1633. 

  1634. <p>Response Header:</p>
    1635. 

  1635. 

  1636. <div class="source">
    1637. 

  1637. <div class="source">
    1638. 

  1638. <pre>  HTTP/1.1 200 OK
    1639. 

  1639.   Content-Type: application/xml
    1640. 

  1640.   Content-Length: 7030
    1641. 

  1641.   Server: Jetty(6.1.26)
    1642. 

  1642. </pre></div></div>
    1643. 

  1643. 

  1644. <p>Response Body:</p>
    1645. 

  1645. 

  1646. <div class="source">
    1647. 

  1647. <div class="source">
    1648. 

  1648. <pre>&lt;?xml version=&quot;1.0&quot; encoding=&quot;UTF-8&quot; standalone=&quot;yes&quot;?&gt;
    1649. 

  1649. &lt;jobCounters&gt;
    1650. 

  1650.   &lt;id&gt;job_1326381300833_2_2&lt;/id&gt;
    1651. 

  1651.   &lt;counterGroup&gt;
    1652. 

  1652.     &lt;counterGroupName&gt;Shuffle Errors&lt;/counterGroupName&gt;
    1653. 

  1653.     &lt;counter&gt;
    1654. 

  1654.       &lt;name&gt;BAD_ID&lt;/name&gt;
    1655. 

  1655.       &lt;totalCounterValue&gt;0&lt;/totalCounterValue&gt;
    1656. 

  1656.       &lt;mapCounterValue&gt;0&lt;/mapCounterValue&gt;
    1657. 

  1657.       &lt;reduceCounterValue&gt;0&lt;/reduceCounterValue&gt;
    1658. 

  1658.     &lt;/counter&gt;
    1659. 

  1659.     &lt;counter&gt;
    1660. 

  1660.       &lt;name&gt;CONNECTION&lt;/name&gt;
    1661. 

  1661.       &lt;totalCounterValue&gt;0&lt;/totalCounterValue&gt;
    1662. 

  1662.       &lt;mapCounterValue&gt;0&lt;/mapCounterValue&gt;
    1663. 

  1663.       &lt;reduceCounterValue&gt;0&lt;/reduceCounterValue&gt;
    1664. 

  1664.     &lt;/counter&gt;
    1665. 

  1665.     &lt;counter&gt;
    1666. 

  1666.       &lt;name&gt;IO_ERROR&lt;/name&gt;
    1667. 

  1667.       &lt;totalCounterValue&gt;0&lt;/totalCounterValue&gt;
    1668. 

  1668.       &lt;mapCounterValue&gt;0&lt;/mapCounterValue&gt;
    1669. 

  1669.       &lt;reduceCounterValue&gt;0&lt;/reduceCounterValue&gt;
    1670. 

  1670.     &lt;/counter&gt;
    1671. 

  1671.     &lt;counter&gt;
    1672. 

  1672.       &lt;name&gt;WRONG_LENGTH&lt;/name&gt;
    1673. 

  1673.       &lt;totalCounterValue&gt;0&lt;/totalCounterValue&gt;
    1674. 

  1674.       &lt;mapCounterValue&gt;0&lt;/mapCounterValue&gt;
    1675. 

  1675.       &lt;reduceCounterValue&gt;0&lt;/reduceCounterValue&gt;
    1676. 

  1676.     &lt;/counter&gt;
    1677. 

  1677.     &lt;counter&gt;
    1678. 

  1678.       &lt;name&gt;WRONG_MAP&lt;/name&gt;
    1679. 

  1679.       &lt;totalCounterValue&gt;0&lt;/totalCounterValue&gt;
    1680. 

  1680.       &lt;mapCounterValue&gt;0&lt;/mapCounterValue&gt;
    1681. 

  1681.       &lt;reduceCounterValue&gt;0&lt;/reduceCounterValue&gt;
    1682. 

  1682.     &lt;/counter&gt;
    1683. 

  1683.     &lt;counter&gt;
    1684. 

  1684.       &lt;name&gt;WRONG_REDUCE&lt;/name&gt;
    1685. 

  1685.       &lt;totalCounterValue&gt;0&lt;/totalCounterValue&gt;
    1686. 

  1686.       &lt;mapCounterValue&gt;0&lt;/mapCounterValue&gt;
    1687. 

  1687.       &lt;reduceCounterValue&gt;0&lt;/reduceCounterValue&gt;
    1688. 

  1688.     &lt;/counter&gt;
    1689. 

  1689.   &lt;/counterGroup&gt;
    1690. 

  1690.   &lt;counterGroup&gt;
    1691. 

  1691.     &lt;counterGroupName&gt;org.apache.hadoop.mapreduce.FileSystemCounter&lt;/counterGroupName&gt;
    1692. 

  1692.     &lt;counter&gt;
    1693. 

  1693.       &lt;name&gt;FILE_BYTES_READ&lt;/name&gt;
    1694. 

  1694.       &lt;totalCounterValue&gt;2483&lt;/totalCounterValue&gt;
    1695. 

  1695.       &lt;mapCounterValue&gt;0&lt;/mapCounterValue&gt;
    1696. 

  1696.       &lt;reduceCounterValue&gt;0&lt;/reduceCounterValue&gt;
    1697. 

  1697.     &lt;/counter&gt;
    1698. 

  1698.     &lt;counter&gt;
    1699. 

  1699.       &lt;name&gt;FILE_BYTES_WRITTEN&lt;/name&gt;
    1700. 

  1700.       &lt;totalCounterValue&gt;108525&lt;/totalCounterValue&gt;
    1701. 

  1701.       &lt;mapCounterValue&gt;0&lt;/mapCounterValue&gt;
    1702. 

  1702.       &lt;reduceCounterValue&gt;0&lt;/reduceCounterValue&gt;
    1703. 

  1703.     &lt;/counter&gt;
    1704. 

  1704.     &lt;counter&gt;
    1705. 

  1705.       &lt;name&gt;FILE_READ_OPS&lt;/name&gt;
    1706. 

  1706.       &lt;totalCounterValue&gt;0&lt;/totalCounterValue&gt;
    1707. 

  1707.       &lt;mapCounterValue&gt;0&lt;/mapCounterValue&gt;
    1708. 

  1708.       &lt;reduceCounterValue&gt;0&lt;/reduceCounterValue&gt;
    1709. 

  1709.     &lt;/counter&gt;
    1710. 

  1710.     &lt;counter&gt;
    1711. 

  1711.       &lt;name&gt;FILE_LARGE_READ_OPS&lt;/name&gt;
    1712. 

  1712.       &lt;totalCounterValue&gt;0&lt;/totalCounterValue&gt;
    1713. 

  1713.       &lt;mapCounterValue&gt;0&lt;/mapCounterValue&gt;
    1714. 

  1714.       &lt;reduceCounterValue&gt;0&lt;/reduceCounterValue&gt;
    1715. 

  1715.     &lt;/counter&gt;
    1716. 

  1716.     &lt;counter&gt;
    1717. 

  1717.       &lt;name&gt;FILE_WRITE_OPS&lt;/name&gt;
    1718. 

  1718.       &lt;totalCounterValue&gt;0&lt;/totalCounterValue&gt;
    1719. 

  1719.       &lt;mapCounterValue&gt;0&lt;/mapCounterValue&gt;
    1720. 

  1720.       &lt;reduceCounterValue&gt;0&lt;/reduceCounterValue&gt;
    1721. 

  1721.     &lt;/counter&gt;
    1722. 

  1722.     &lt;counter&gt;
    1723. 

  1723.       &lt;name&gt;HDFS_BYTES_READ&lt;/name&gt;
    1724. 

  1724.       &lt;totalCounterValue&gt;48&lt;/totalCounterValue&gt;
    1725. 

  1725.       &lt;mapCounterValue&gt;0&lt;/mapCounterValue&gt;
    1726. 

  1726.       &lt;reduceCounterValue&gt;0&lt;/reduceCounterValue&gt;
    1727. 

  1727.     &lt;/counter&gt;
    1728. 

  1728.     &lt;counter&gt;
    1729. 

  1729.       &lt;name&gt;HDFS_BYTES_WRITTEN&lt;/name&gt;
    1730. 

  1730.       &lt;totalCounterValue&gt;0&lt;/totalCounterValue&gt;
    1731. 

  1731.       &lt;mapCounterValue&gt;0&lt;/mapCounterValue&gt;
    1732. 

  1732.       &lt;reduceCounterValue&gt;0&lt;/reduceCounterValue&gt;
    1733. 

  1733.     &lt;/counter&gt;
    1734. 

  1734.     &lt;counter&gt;
    1735. 

  1735.       &lt;name&gt;HDFS_READ_OPS&lt;/name&gt;
    1736. 

  1736.       &lt;totalCounterValue&gt;1&lt;/totalCounterValue&gt;
    1737. 

  1737.       &lt;mapCounterValue&gt;0&lt;/mapCounterValue&gt;
    1738. 

  1738.       &lt;reduceCounterValue&gt;0&lt;/reduceCounterValue&gt;
    1739. 

  1739.     &lt;/counter&gt;
    1740. 

  1740.     &lt;counter&gt;
    1741. 

  1741.       &lt;name&gt;HDFS_LARGE_READ_OPS&lt;/name&gt;
    1742. 

  1742.       &lt;totalCounterValue&gt;0&lt;/totalCounterValue&gt;
    1743. 

  1743.       &lt;mapCounterValue&gt;0&lt;/mapCounterValue&gt;
    1744. 

  1744.       &lt;reduceCounterValue&gt;0&lt;/reduceCounterValue&gt;
    1745. 

  1745.     &lt;/counter&gt;
    1746. 

  1746.     &lt;counter&gt;
    1747. 

  1747.       &lt;name&gt;HDFS_WRITE_OPS&lt;/name&gt;
    1748. 

  1748.       &lt;totalCounterValue&gt;0&lt;/totalCounterValue&gt;
    1749. 

  1749.       &lt;mapCounterValue&gt;0&lt;/mapCounterValue&gt;
    1750. 

  1750.       &lt;reduceCounterValue&gt;0&lt;/reduceCounterValue&gt;
    1751. 

  1751.     &lt;/counter&gt;
    1752. 

  1752.   &lt;/counterGroup&gt;
    1753. 

  1753.   &lt;counterGroup&gt;
    1754. 

  1754.     &lt;counterGroupName&gt;org.apache.hadoop.mapreduce.TaskCounter&lt;/counterGroupName&gt;
    1755. 

  1755.     &lt;counter&gt;
    1756. 

  1756.       &lt;name&gt;MAP_INPUT_RECORDS&lt;/name&gt;
    1757. 

  1757.       &lt;totalCounterValue&gt;1&lt;/totalCounterValue&gt;
    1758. 

  1758.       &lt;mapCounterValue&gt;0&lt;/mapCounterValue&gt;
    1759. 

  1759.       &lt;reduceCounterValue&gt;0&lt;/reduceCounterValue&gt;
    1760. 

  1760.     &lt;/counter&gt;
    1761. 

  1761.     &lt;counter&gt;
    1762. 

  1762.       &lt;name&gt;MAP_OUTPUT_RECORDS&lt;/name&gt;
    1763. 

  1763.       &lt;totalCounterValue&gt;1200&lt;/totalCounterValue&gt;
    1764. 

  1764.       &lt;mapCounterValue&gt;0&lt;/mapCounterValue&gt;
    1765. 

  1765.       &lt;reduceCounterValue&gt;0&lt;/reduceCounterValue&gt;
    1766. 

  1766.     &lt;/counter&gt;
    1767. 

  1767.     &lt;counter&gt;
    1768. 

  1768.       &lt;name&gt;MAP_OUTPUT_BYTES&lt;/name&gt;
    1769. 

  1769.       &lt;totalCounterValue&gt;4800&lt;/totalCounterValue&gt;
    1770. 

  1770.       &lt;mapCounterValue&gt;0&lt;/mapCounterValue&gt;
    1771. 

  1771.       &lt;reduceCounterValue&gt;0&lt;/reduceCounterValue&gt;
    1772. 

  1772.     &lt;/counter&gt;
    1773. 

  1773.     &lt;counter&gt;
    1774. 

  1774.       &lt;name&gt;MAP_OUTPUT_MATERIALIZED_BYTES&lt;/name&gt;
    1775. 

  1775.       &lt;totalCounterValue&gt;2235&lt;/totalCounterValue&gt;
    1776. 

  1776.       &lt;mapCounterValue&gt;0&lt;/mapCounterValue&gt;
    1777. 

  1777.       &lt;reduceCounterValue&gt;0&lt;/reduceCounterValue&gt;
    1778. 

  1778.     &lt;/counter&gt;
    1779. 

  1779.     &lt;counter&gt;
    1780. 

  1780.       &lt;name&gt;SPLIT_RAW_BYTES&lt;/name&gt;
    1781. 

  1781.       &lt;totalCounterValue&gt;48&lt;/totalCounterValue&gt;
    1782. 

  1782.       &lt;mapCounterValue&gt;0&lt;/mapCounterValue&gt;
    1783. 

  1783.       &lt;reduceCounterValue&gt;0&lt;/reduceCounterValue&gt;
    1784. 

  1784.     &lt;/counter&gt;
    1785. 

  1785.     &lt;counter&gt;
    1786. 

  1786.       &lt;name&gt;COMBINE_INPUT_RECORDS&lt;/name&gt;
    1787. 

  1787.       &lt;totalCounterValue&gt;0&lt;/totalCounterValue&gt;
    1788. 

  1788.       &lt;mapCounterValue&gt;0&lt;/mapCounterValue&gt;
    1789. 

  1789.       &lt;reduceCounterValue&gt;0&lt;/reduceCounterValue&gt;
    1790. 

  1790.     &lt;/counter&gt;
    1791. 

  1791.     &lt;counter&gt;
    1792. 

  1792.       &lt;name&gt;COMBINE_OUTPUT_RECORDS&lt;/name&gt;
    1793. 

  1793.       &lt;totalCounterValue&gt;0&lt;/totalCounterValue&gt;
    1794. 

  1794.       &lt;mapCounterValue&gt;0&lt;/mapCounterValue&gt;
    1795. 

  1795.       &lt;reduceCounterValue&gt;0&lt;/reduceCounterValue&gt;
    1796. 

  1796.     &lt;/counter&gt;
    1797. 

  1797.     &lt;counter&gt;
    1798. 

  1798.       &lt;name&gt;REDUCE_INPUT_GROUPS&lt;/name&gt;
    1799. 

  1799.       &lt;totalCounterValue&gt;1200&lt;/totalCounterValue&gt;
    1800. 

  1800.       &lt;mapCounterValue&gt;0&lt;/mapCounterValue&gt;
    1801. 

  1801.       &lt;reduceCounterValue&gt;0&lt;/reduceCounterValue&gt;
    1802. 

  1802.     &lt;/counter&gt;
    1803. 

  1803.     &lt;counter&gt;
    1804. 

  1804.       &lt;name&gt;REDUCE_SHUFFLE_BYTES&lt;/name&gt;
    1805. 

  1805.       &lt;totalCounterValue&gt;2235&lt;/totalCounterValue&gt;
    1806. 

  1806.       &lt;mapCounterValue&gt;0&lt;/mapCounterValue&gt;
    1807. 

  1807.       &lt;reduceCounterValue&gt;0&lt;/reduceCounterValue&gt;
    1808. 

  1808.     &lt;/counter&gt;
    1809. 

  1809.     &lt;counter&gt;
    1810. 

  1810.       &lt;name&gt;REDUCE_INPUT_RECORDS&lt;/name&gt;
    1811. 

  1811.       &lt;totalCounterValue&gt;1200&lt;/totalCounterValue&gt;
    1812. 

  1812.       &lt;mapCounterValue&gt;0&lt;/mapCounterValue&gt;
    1813. 

  1813.       &lt;reduceCounterValue&gt;0&lt;/reduceCounterValue&gt;
    1814. 

  1814.     &lt;/counter&gt;
    1815. 

  1815.     &lt;counter&gt;
    1816. 

  1816.       &lt;name&gt;REDUCE_OUTPUT_RECORDS&lt;/name&gt;
    1817. 

  1817.       &lt;totalCounterValue&gt;0&lt;/totalCounterValue&gt;
    1818. 

  1818.       &lt;mapCounterValue&gt;0&lt;/mapCounterValue&gt;
    1819. 

  1819.       &lt;reduceCounterValue&gt;0&lt;/reduceCounterValue&gt;
    1820. 

  1820.     &lt;/counter&gt;
    1821. 

  1821.     &lt;counter&gt;
    1822. 

  1822.       &lt;name&gt;SPILLED_RECORDS&lt;/name&gt;
    1823. 

  1823.       &lt;totalCounterValue&gt;2400&lt;/totalCounterValue&gt;
    1824. 

  1824.       &lt;mapCounterValue&gt;0&lt;/mapCounterValue&gt;
    1825. 

  1825.       &lt;reduceCounterValue&gt;0&lt;/reduceCounterValue&gt;
    1826. 

  1826.     &lt;/counter&gt;
    1827. 

  1827.     &lt;counter&gt;
    1828. 

  1828.       &lt;name&gt;SHUFFLED_MAPS&lt;/name&gt;
    1829. 

  1829.       &lt;totalCounterValue&gt;1&lt;/totalCounterValue&gt;
    1830. 

  1830.       &lt;mapCounterValue&gt;0&lt;/mapCounterValue&gt;
    1831. 

  1831.       &lt;reduceCounterValue&gt;0&lt;/reduceCounterValue&gt;
    1832. 

  1832.     &lt;/counter&gt;
    1833. 

  1833.     &lt;counter&gt;
    1834. 

  1834.       &lt;name&gt;FAILED_SHUFFLE&lt;/name&gt;
    1835. 

  1835.       &lt;totalCounterValue&gt;0&lt;/totalCounterValue&gt;
    1836. 

  1836.       &lt;mapCounterValue&gt;0&lt;/mapCounterValue&gt;
    1837. 

  1837.       &lt;reduceCounterValue&gt;0&lt;/reduceCounterValue&gt;
    1838. 

  1838.     &lt;/counter&gt;
    1839. 

  1839.     &lt;counter&gt;
    1840. 

  1840.       &lt;name&gt;MERGED_MAP_OUTPUTS&lt;/name&gt;
    1841. 

  1841.       &lt;totalCounterValue&gt;1&lt;/totalCounterValue&gt;
    1842. 

  1842.       &lt;mapCounterValue&gt;0&lt;/mapCounterValue&gt;
    1843. 

  1843.       &lt;reduceCounterValue&gt;0&lt;/reduceCounterValue&gt;
    1844. 

  1844.     &lt;/counter&gt;
    1845. 

  1845.     &lt;counter&gt;
    1846. 

  1846.       &lt;name&gt;GC_TIME_MILLIS&lt;/name&gt;
    1847. 

  1847.       &lt;totalCounterValue&gt;113&lt;/totalCounterValue&gt;
    1848. 

  1848.       &lt;mapCounterValue&gt;0&lt;/mapCounterValue&gt;
    1849. 

  1849.       &lt;reduceCounterValue&gt;0&lt;/reduceCounterValue&gt;
    1850. 

  1850.     &lt;/counter&gt;
    1851. 

  1851.     &lt;counter&gt;
    1852. 

  1852.       &lt;name&gt;CPU_MILLISECONDS&lt;/name&gt;
    1853. 

  1853.       &lt;totalCounterValue&gt;1830&lt;/totalCounterValue&gt;
    1854. 

  1854.       &lt;mapCounterValue&gt;0&lt;/mapCounterValue&gt;
    1855. 

  1855.       &lt;reduceCounterValue&gt;0&lt;/reduceCounterValue&gt;
    1856. 

  1856.     &lt;/counter&gt;
    1857. 

  1857.     &lt;counter&gt;
    1858. 

  1858.       &lt;name&gt;PHYSICAL_MEMORY_BYTES&lt;/name&gt;
    1859. 

  1859.       &lt;totalCounterValue&gt;478068736&lt;/totalCounterValue&gt;
    1860. 

  1860.       &lt;mapCounterValue&gt;0&lt;/mapCounterValue&gt;
    1861. 

  1861.       &lt;reduceCounterValue&gt;0&lt;/reduceCounterValue&gt;
    1862. 

  1862.     &lt;/counter&gt;
    1863. 

  1863.     &lt;counter&gt;
    1864. 

  1864.       &lt;name&gt;VIRTUAL_MEMORY_BYTES&lt;/name&gt;
    1865. 

  1865.       &lt;totalCounterValue&gt;2159284224&lt;/totalCounterValue&gt;
    1866. 

  1866.       &lt;mapCounterValue&gt;0&lt;/mapCounterValue&gt;
    1867. 

  1867.       &lt;reduceCounterValue&gt;0&lt;/reduceCounterValue&gt;
    1868. 

  1868.     &lt;/counter&gt;
    1869. 

  1869.     &lt;counter&gt;
    1870. 

  1870.       &lt;name&gt;COMMITTED_HEAP_BYTES&lt;/name&gt;
    1871. 

  1871.       &lt;totalCounterValue&gt;378863616&lt;/totalCounterValue&gt;
    1872. 

  1872.       &lt;mapCounterValue&gt;0&lt;/mapCounterValue&gt;
    1873. 

  1873.       &lt;reduceCounterValue&gt;0&lt;/reduceCounterValue&gt;
    1874. 

  1874.     &lt;/counter&gt;
    1875. 

  1875.   &lt;/counterGroup&gt;
    1876. 

  1876.   &lt;counterGroup&gt;
    1877. 

  1877.     &lt;counterGroupName&gt;org.apache.hadoop.mapreduce.lib.input.FileInputFormatCounter&lt;/counterGroupName&gt;
    1878. 

  1878.     &lt;counter&gt;
    1879. 

  1879.       &lt;name&gt;BYTES_READ&lt;/name&gt;
    1880. 

  1880.       &lt;totalCounterValue&gt;0&lt;/totalCounterValue&gt;
    1881. 

  1881.       &lt;mapCounterValue&gt;0&lt;/mapCounterValue&gt;
    1882. 

  1882.       &lt;reduceCounterValue&gt;0&lt;/reduceCounterValue&gt;
    1883. 

  1883.     &lt;/counter&gt;
    1884. 

  1884.   &lt;/counterGroup&gt;
    1885. 

  1885.   &lt;counterGroup&gt;
    1886. 

  1886.     &lt;counterGroupName&gt;org.apache.hadoop.mapreduce.lib.output.FileOutputFormatCounter&lt;/counterGroupName&gt;
    1887. 

  1887.     &lt;counter&gt;
    1888. 

  1888.       &lt;name&gt;BYTES_WRITTEN&lt;/name&gt;
    1889. 

  1889.       &lt;totalCounterValue&gt;0&lt;/totalCounterValue&gt;
    1890. 

  1890.       &lt;mapCounterValue&gt;0&lt;/mapCounterValue&gt;
    1891. 

  1891.       &lt;reduceCounterValue&gt;0&lt;/reduceCounterValue&gt;
    1892. 

  1892.     &lt;/counter&gt;
    1893. 

  1893.   &lt;/counterGroup&gt;
    1894. 

  1894. &lt;/jobCounters&gt;
    1895. 

  1895. </pre></div></div>
    1896. 

  1896. </section></section><section>
    1897. 

  1897. <h3><a name="Job_Conf_API"></a>Job Conf API</h3>
    1898. 

  1898. <p>A job configuration resource contains information about the job configuration for this job.</p><section>
    1899. 

  1899. <h4><a name="URI"></a>URI</h4>
    1900. 

  1900. <p>Use the following URI to obtain th job configuration information, from a job identified by the jobid value.</p>
    1901. 

  1901. <ul>
    1902. 

  1902. 

  1903. <li><a class="externalLink" href="http://history-server-http-address:port/ws/v1/history/mapreduce/jobs/{jobid}/conf">http://history-server-http-address:port/ws/v1/history/mapreduce/jobs/{jobid}/conf</a></li>
    1904. 

  1904. </ul></section><section>
    1905. 

  1905. <h4><a name="HTTP_Operations_Supported"></a>HTTP Operations Supported</h4>
    1906. 

  1906. <ul>
    1907. 

  1907. 

  1908. <li>GET</li>
    1909. 

  1909. </ul></section><section>
    1910. 

  1910. <h4><a name="Query_Parameters_Supported"></a>Query Parameters Supported</h4>
    1911. 

  1911. 

  1912. <div class="source">
    1913. 

  1913. <div class="source">
    1914. 

  1914. <pre>  None
    1915. 

  1915. </pre></div></div>
    1916. 

  1916. </section><section>
    1917. 

  1917. <h4><a name="Elements_of_the_conf_object"></a>Elements of the <i>conf</i> object</h4>
    1918. 

  1918. <table border="0" class="bodyTable">
    1919. 

  1919. <thead>
    1920. 

  1920. 

  1921. <tr class="a">
    1922. 

  1922. <th align="left"> Item </th>
    1923. 

  1923. <th align="left"> Data Type </th>
    1924. 

  1924. <th align="left"> Description </th></tr>
    1925. 

  1925. </thead><tbody>
    1926. 

  1926. 

  1927. <tr class="b">
    1928. 

  1928. <td align="left"> path </td>
    1929. 

  1929. <td align="left"> string </td>
    1930. 

  1930. <td align="left"> The path to the job configuration file </td></tr>
    1931. 

  1931. <tr class="a">
    1932. 

  1932. <td align="left"> property </td>
    1933. 

  1933. <td align="left"> array of the configuration properties(JSON)/zero or more configuration properties(XML) </td>
    1934. 

  1934. <td align="left"> Collection of configuration property objects </td></tr>
    1935. 

  1935. </tbody>
    1936. 

  1936. </table></section><section>
    1937. 

  1937. <h4><a name="Elements_of_the_property_object"></a>Elements of the <i>property</i> object</h4>
    1938. 

  1938. <table border="0" class="bodyTable">
    1939. 

  1939. <thead>
    1940. 

  1940. 

  1941. <tr class="a">
    1942. 

  1942. <th align="left"> Item </th>
    1943. 

  1943. <th align="left"> Data Type </th>
    1944. 

  1944. <th align="left"> Description </th></tr>
    1945. 

  1945. </thead><tbody>
    1946. 

  1946. 

  1947. <tr class="b">
    1948. 

  1948. <td align="left"> name </td>
    1949. 

  1949. <td align="left"> string </td>
    1950. 

  1950. <td align="left"> The name of the configuration property </td></tr>
    1951. 

  1951. <tr class="a">
    1952. 

  1952. <td align="left"> value </td>
    1953. 

  1953. <td align="left"> string </td>
    1954. 

  1954. <td align="left"> The value of the configuration property </td></tr>
    1955. 

  1955. <tr class="b">
    1956. 

  1956. <td align="left"> source </td>
    1957. 

  1957. <td align="left"> string </td>
    1958. 

  1958. <td align="left"> The location this configuration object came from. If there is more then one of these it shows the history with the latest source at the end of the list. </td></tr>
    1959. 

  1959. </tbody>
    1960. 

  1960. </table></section><section>
    1961. 

  1961. <h4><a name="Response_Examples"></a>Response Examples</h4>
    1962. 

  1962. <p><b>JSON response</b></p>
    1963. 

  1963. <p>HTTP Request:</p>
    1964. 

  1964. 

  1965. <div class="source">
    1966. 

  1966. <div class="source">
    1967. 

  1967. <pre>  GET http://history-server-http-address:port/ws/v1/history/mapreduce/jobs/job_1326381300833_2_2/conf
    1968. 

  1968. </pre></div></div>
    1969. 

  1969. 

  1970. <p>Response Header:</p>
    1971. 

  1971. 

  1972. <div class="source">
    1973. 

  1973. <div class="source">
    1974. 

  1974. <pre>  HTTP/1.1 200 OK
    1975. 

  1975.   Content-Type: application/json
    1976. 

  1976.   Transfer-Encoding: chunked
    1977. 

  1977.   Server: Jetty(6.1.26)
    1978. 

  1978. </pre></div></div>
    1979. 

  1979. 

  1980. <p>Response Body:</p>
    1981. 

  1981. <p>This is a small snippet of the output as the output if very large. The real output contains every property in your job configuration file.</p>
    1982. 

  1982. 

  1983. <div class="source">
    1984. 

  1984. <div class="source">
    1985. 

  1985. <pre>{
    1986. 

  1986.    &quot;conf&quot; : {
    1987. 

  1987.       &quot;path&quot; : &quot;hdfs://host.domain.com:9000/user/user1/.staging/job_1326381300833_0002/job.xml&quot;,
    1988. 

  1988.       &quot;property&quot; : [
    1989. 

  1989.          {
    1990. 

  1990.             &quot;value&quot; : &quot;/home/hadoop/hdfs/data&quot;,
    1991. 

  1991.             &quot;name&quot; : &quot;dfs.datanode.data.dir&quot;
    1992. 

  1992.             &quot;source&quot; : [&quot;hdfs-site.xml&quot;, &quot;job.xml&quot;]
    1993. 

  1993.          },
    1994. 

  1994.          {
    1995. 

  1995.             &quot;value&quot; : &quot;org.apache.hadoop.yarn.server.webproxy.amfilter.AmFilterInitializer&quot;,
    1996. 

  1996.             &quot;name&quot; : &quot;hadoop.http.filter.initializers&quot;
    1997. 

  1997.             &quot;source&quot; : [&quot;programmatically&quot;, &quot;job.xml&quot;]
    1998. 

  1998.          },
    1999. 

  1999.          {
    2000. 

  2000.             &quot;value&quot; : &quot;/home/hadoop/tmp&quot;,
    2001. 

  2001.             &quot;name&quot; : &quot;mapreduce.cluster.temp.dir&quot;
    2002. 

  2002.             &quot;source&quot; : [&quot;mapred-site.xml&quot;]
    2003. 

  2003.          },
    2004. 

  2004.          ...
    2005. 

  2005.       ]
    2006. 

  2006.    }
    2007. 

  2007. }
    2008. 

  2008. </pre></div></div>
    2009. 

  2009. 

  2010. <p><b>XML response</b></p>
    2011. 

  2011. <p>HTTP Request:</p>
    2012. 

  2012. 

  2013. <div class="source">
    2014. 

  2014. <div class="source">
    2015. 

  2015. <pre>  GET http://history-server-http-address:port/ws/v1/history/mapreduce/jobs/job_1326381300833_2_2/conf
    2016. 

  2016.   Accept: application/xml
    2017. 

  2017. </pre></div></div>
    2018. 

  2018. 

  2019. <p>Response Header:</p>
    2020. 

  2020. 

  2021. <div class="source">
    2022. 

  2022. <div class="source">
    2023. 

  2023. <pre>  HTTP/1.1 200 OK
    2024. 

  2024.   Content-Type: application/xml
    2025. 

  2025.   Content-Length: 552
    2026. 

  2026.   Server: Jetty(6.1.26)
    2027. 

  2027. </pre></div></div>
    2028. 

  2028. 

  2029. <p>Response Body:</p>
    2030. 

  2030. 

  2031. <div class="source">
    2032. 

  2032. <div class="source">
    2033. 

  2033. <pre>&lt;?xml version=&quot;1.0&quot; encoding=&quot;UTF-8&quot; standalone=&quot;yes&quot;?&gt;
    2034. 

  2034. &lt;conf&gt;
    2035. 

  2035.   &lt;path&gt;hdfs://host.domain.com:9000/user/user1/.staging/job_1326381300833_0002/job.xml&lt;/path&gt;
    2036. 

  2036.   &lt;property&gt;
    2037. 

  2037.     &lt;name&gt;dfs.datanode.data.dir&lt;/name&gt;
    2038. 

  2038.     &lt;value&gt;/home/hadoop/hdfs/data&lt;/value&gt;
    2039. 

  2039.     &lt;source&gt;hdfs-site.xml&lt;/source&gt;
    2040. 

  2040.     &lt;source&gt;job.xml&lt;/source&gt;
    2041. 

  2041.   &lt;/property&gt;
    2042. 

  2042.   &lt;property&gt;
    2043. 

  2043.     &lt;name&gt;hadoop.http.filter.initializers&lt;/name&gt;
    2044. 

  2044.     &lt;value&gt;org.apache.hadoop.yarn.server.webproxy.amfilter.AmFilterInitializer&lt;/value&gt;
    2045. 

  2045.     &lt;source&gt;programmatically&lt;/source&gt;
    2046. 

  2046.     &lt;source&gt;job.xml&lt;/source&gt;
    2047. 

  2047.   &lt;/property&gt;
    2048. 

  2048.   &lt;property&gt;
    2049. 

  2049.     &lt;name&gt;mapreduce.cluster.temp.dir&lt;/name&gt;
    2050. 

  2050.     &lt;value&gt;/home/hadoop/tmp&lt;/value&gt;
    2051. 

  2051.     &lt;source&gt;mapred-site.xml&lt;/source&gt;
    2052. 

  2052.   &lt;/property&gt;
    2053. 

  2053.   ...
    2054. 

  2054. &lt;/conf&gt;
    2055. 

  2055. </pre></div></div>
    2056. 

  2056. </section></section><section>
    2057. 

  2057. <h3><a name="Tasks_API"></a>Tasks API</h3>
    2058. 

  2058. <p>With the tasks API, you can obtain a collection of resources that represent a task within a job. When you run a GET operation on this resource, you obtain a collection of Task Objects.</p><section>
    2059. 

  2059. <h4><a name="URI"></a>URI</h4>
    2060. 

  2060. <ul>
    2061. 

  2061. 

  2062. <li><a class="externalLink" href="http://history-server-http-address:port/ws/v1/history/mapreduce/jobs/{jobid}/tasks">http://history-server-http-address:port/ws/v1/history/mapreduce/jobs/{jobid}/tasks</a></li>
    2063. 

  2063. </ul></section><section>
    2064. 

  2064. <h4><a name="HTTP_Operations_Supported"></a>HTTP Operations Supported</h4>
    2065. 

  2065. <ul>
    2066. 

  2066. 

  2067. <li>GET</li>
    2068. 

  2068. </ul></section><section>
    2069. 

  2069. <h4><a name="Query_Parameters_Supported"></a>Query Parameters Supported</h4>
    2070. 

  2070. <ul>
    2071. 

  2071. 

  2072. <li>type - type of task, valid values are m or r.  m for map task or r for reduce task.</li>
    2073. 

  2073. </ul></section><section>
    2074. 

  2074. <h4><a name="Elements_of_the_tasks_object"></a>Elements of the <i>tasks</i> object</h4>
    2075. 

  2075. <p>When you make a request for the list of tasks , the information will be returned as an array of task objects. See also <a href="#Task_API">Task API</a> for syntax of the task object.</p>
    2076. 

  2076. <table border="0" class="bodyTable">
    2077. 

  2077. <thead>
    2078. 

  2078. 

  2079. <tr class="a">
    2080. 

  2080. <th align="left"> Item </th>
    2081. 

  2081. <th align="left"> Data Type </th>
    2082. 

  2082. <th align="left"> Description </th></tr>
    2083. 

  2083. </thead><tbody>
    2084. 

  2084. 

  2085. <tr class="b">
    2086. 

  2086. <td align="left"> task </td>
    2087. 

  2087. <td align="left"> array of task objects(JSON)/zero or more task objects(XML) </td>
    2088. 

  2088. <td align="left"> The collection of task objects. </td></tr>
    2089. 

  2089. </tbody>
    2090. 

  2090. </table></section><section>
    2091. 

  2091. <h4><a name="Response_Examples"></a>Response Examples</h4>
    2092. 

  2092. <p><b>JSON response</b></p>
    2093. 

  2093. <p>HTTP Request:</p>
    2094. 

  2094. 

  2095. <div class="source">
    2096. 

  2096. <div class="source">
    2097. 

  2097. <pre>  GET http://history-server-http-address:port/ws/v1/history/mapreduce/jobs/job_1326381300833_2_2/tasks
    2098. 

  2098. </pre></div></div>
    2099. 

  2099. 

  2100. <p>Response Header:</p>
    2101. 

  2101. 

  2102. <div class="source">
    2103. 

  2103. <div class="source">
    2104. 

  2104. <pre>  HTTP/1.1 200 OK
    2105. 

  2105.   Content-Type: application/json
    2106. 

  2106.   Transfer-Encoding: chunked
    2107. 

  2107.   Server: Jetty(6.1.26)
    2108. 

  2108. </pre></div></div>
    2109. 

  2109. 

  2110. <p>Response Body:</p>
    2111. 

  2111. 

  2112. <div class="source">
    2113. 

  2113. <div class="source">
    2114. 

  2114. <pre>{
    2115. 

  2115.    &quot;tasks&quot; : {
    2116. 

  2116.       &quot;task&quot; : [
    2117. 

  2117.          {
    2118. 

  2118.             &quot;progress&quot; : 100,
    2119. 

  2119.             &quot;elapsedTime&quot; : 6777,
    2120. 

  2120.             &quot;state&quot; : &quot;SUCCEEDED&quot;,
    2121. 

  2121.             &quot;startTime&quot; : 1326381446541,
    2122. 

  2122.             &quot;id&quot; : &quot;task_1326381300833_2_2_m_0&quot;,
    2123. 

  2123.             &quot;type&quot; : &quot;MAP&quot;,
    2124. 

  2124.             &quot;successfulAttempt&quot; : &quot;attempt_1326381300833_2_2_m_0_0&quot;,
    2125. 

  2125.             &quot;finishTime&quot; : 1326381453318
    2126. 

  2126.          },
    2127. 

  2127.          {
    2128. 

  2128.             &quot;progress&quot; : 100,
    2129. 

  2129.             &quot;elapsedTime&quot; : 135559,
    2130. 

  2130.             &quot;state&quot; : &quot;SUCCEEDED&quot;,
    2131. 

  2131.             &quot;startTime&quot; : 1326381446544,
    2132. 

  2132.             &quot;id&quot; : &quot;task_1326381300833_2_2_r_0&quot;,
    2133. 

  2133.             &quot;type&quot; : &quot;REDUCE&quot;,
    2134. 

  2134.             &quot;successfulAttempt&quot; : &quot;attempt_1326381300833_2_2_r_0_0&quot;,
    2135. 

  2135.             &quot;finishTime&quot; : 1326381582103
    2136. 

  2136.          }
    2137. 

  2137.       ]
    2138. 

  2138.    }
    2139. 

  2139. }
    2140. 

  2140. </pre></div></div>
    2141. 

  2141. 

  2142. <p><b>XML response</b></p>
    2143. 

  2143. <p>HTTP Request:</p>
    2144. 

  2144. 

  2145. <div class="source">
    2146. 

  2146. <div class="source">
    2147. 

  2147. <pre>  GET http://history-server-http-address:port/ws/v1/history/mapreduce/jobs/job_1326381300833_2_2/tasks
    2148. 

  2148.   Accept: application/xml
    2149. 

  2149. </pre></div></div>
    2150. 

  2150. 

  2151. <p>Response Header:</p>
    2152. 

  2152. 

  2153. <div class="source">
    2154. 

  2154. <div class="source">
    2155. 

  2155. <pre>  HTTP/1.1 200 OK
    2156. 

  2156.   Content-Type: application/xml
    2157. 

  2157.   Content-Length: 653
    2158. 

  2158.   Server: Jetty(6.1.26)
    2159. 

  2159. </pre></div></div>
    2160. 

  2160. 

  2161. <p>Response Body:</p>
    2162. 

  2162. 

  2163. <div class="source">
    2164. 

  2164. <div class="source">
    2165. 

  2165. <pre>&lt;?xml version=&quot;1.0&quot; encoding=&quot;UTF-8&quot; standalone=&quot;yes&quot;?&gt;
    2166. 

  2166. &lt;tasks&gt;
    2167. 

  2167.   &lt;task&gt;
    2168. 

  2168.     &lt;startTime&gt;1326381446541&lt;/startTime&gt;
    2169. 

  2169.     &lt;finishTime&gt;1326381453318&lt;/finishTime&gt;
    2170. 

  2170.     &lt;elapsedTime&gt;6777&lt;/elapsedTime&gt;
    2171. 

  2171.     &lt;progress&gt;100.0&lt;/progress&gt;
    2172. 

  2172.     &lt;id&gt;task_1326381300833_2_2_m_0&lt;/id&gt;
    2173. 

  2173.     &lt;state&gt;SUCCEEDED&lt;/state&gt;
    2174. 

  2174.     &lt;type&gt;MAP&lt;/type&gt;
    2175. 

  2175.     &lt;successfulAttempt&gt;attempt_1326381300833_2_2_m_0_0&lt;/successfulAttempt&gt;
    2176. 

  2176.   &lt;/task&gt;
    2177. 

  2177.   &lt;task&gt;
    2178. 

  2178.     &lt;startTime&gt;1326381446544&lt;/startTime&gt;
    2179. 

  2179.     &lt;finishTime&gt;1326381582103&lt;/finishTime&gt;
    2180. 

  2180.     &lt;elapsedTime&gt;135559&lt;/elapsedTime&gt;
    2181. 

  2181.     &lt;progress&gt;100.0&lt;/progress&gt;
    2182. 

  2182.     &lt;id&gt;task_1326381300833_2_2_r_0&lt;/id&gt;
    2183. 

  2183.     &lt;state&gt;SUCCEEDED&lt;/state&gt;
    2184. 

  2184.     &lt;type&gt;REDUCE&lt;/type&gt;
    2185. 

  2185.     &lt;successfulAttempt&gt;attempt_1326381300833_2_2_r_0_0&lt;/successfulAttempt&gt;
    2186. 

  2186.   &lt;/task&gt;
    2187. 

  2187. &lt;/tasks&gt;
    2188. 

  2188. </pre></div></div>
    2189. 

  2189. </section></section><section>
    2190. 

  2190. <h3><a name="Task_API"></a>Task API</h3>
    2191. 

  2191. <p>A Task resource contains information about a particular task within a job.</p><section>
    2192. 

  2192. <h4><a name="URI"></a>URI</h4>
    2193. 

  2193. <p>Use the following URI to obtain an Task Object, from a task identified by the taskid value.</p>
    2194. 

  2194. <ul>
    2195. 

  2195. 

  2196. <li><a class="externalLink" href="http://history-server-http-address:port/ws/v1/history/mapreduce/jobs/{jobid}/tasks/{taskid}">http://history-server-http-address:port/ws/v1/history/mapreduce/jobs/{jobid}/tasks/{taskid}</a></li>
    2197. 

  2197. </ul></section><section>
    2198. 

  2198. <h4><a name="HTTP_Operations_Supported"></a>HTTP Operations Supported</h4>
    2199. 

  2199. <ul>
    2200. 

  2200. 

  2201. <li>GET</li>
    2202. 

  2202. </ul></section><section>
    2203. 

  2203. <h4><a name="Query_Parameters_Supported"></a>Query Parameters Supported</h4>
    2204. 

  2204. 

  2205. <div class="source">
    2206. 

  2206. <div class="source">
    2207. 

  2207. <pre>  None
    2208. 

  2208. </pre></div></div>
    2209. 

  2209. </section><section>
    2210. 

  2210. <h4><a name="Elements_of_the_task_object"></a>Elements of the <i>task</i> object</h4>
    2211. 

  2211. <table border="0" class="bodyTable">
    2212. 

  2212. <thead>
    2213. 

  2213. 

  2214. <tr class="a">
    2215. 

  2215. <th align="left"> Item </th>
    2216. 

  2216. <th align="left"> Data Type </th>
    2217. 

  2217. <th align="left"> Description </th></tr>
    2218. 

  2218. </thead><tbody>
    2219. 

  2219. 

  2220. <tr class="b">
    2221. 

  2221. <td align="left"> id </td>
    2222. 

  2222. <td align="left"> string </td>
    2223. 

  2223. <td align="left"> The task id </td></tr>
    2224. 

  2224. <tr class="a">
    2225. 

  2225. <td align="left"> state </td>
    2226. 

  2226. <td align="left"> string </td>
    2227. 

  2227. <td align="left"> The state of the task - valid values are: NEW, SCHEDULED, RUNNING, SUCCEEDED, FAILED, KILL_WAIT, KILLED </td></tr>
    2228. 

  2228. <tr class="b">
    2229. 

  2229. <td align="left"> type </td>
    2230. 

  2230. <td align="left"> string </td>
    2231. 

  2231. <td align="left"> The task type - MAP or REDUCE </td></tr>
    2232. 

  2232. <tr class="a">
    2233. 

  2233. <td align="left"> successfulAttempt </td>
    2234. 

  2234. <td align="left"> string </td>
    2235. 

  2235. <td align="left"> The id of the last successful attempt </td></tr>
    2236. 

  2236. <tr class="b">
    2237. 

  2237. <td align="left"> progress </td>
    2238. 

  2238. <td align="left"> float </td>
    2239. 

  2239. <td align="left"> The progress of the task as a percent </td></tr>
    2240. 

  2240. <tr class="a">
    2241. 

  2241. <td align="left"> startTime </td>
    2242. 

  2242. <td align="left"> long </td>
    2243. 

  2243. <td align="left"> The time in which the task started (in ms since epoch) or -1 if it was never started </td></tr>
    2244. 

  2244. <tr class="b">
    2245. 

  2245. <td align="left"> finishTime </td>
    2246. 

  2246. <td align="left"> long </td>
    2247. 

  2247. <td align="left"> The time in which the task finished (in ms since epoch) </td></tr>
    2248. 

  2248. <tr class="a">
    2249. 

  2249. <td align="left"> elapsedTime </td>
    2250. 

  2250. <td align="left"> long </td>
    2251. 

  2251. <td align="left"> The elapsed time since the application started (in ms) </td></tr>
    2252. 

  2252. </tbody>
    2253. 

  2253. </table></section><section>
    2254. 

  2254. <h4><a name="Response_Examples"></a>Response Examples</h4>
    2255. 

  2255. <p><b>JSON response</b></p>
    2256. 

  2256. <p>HTTP Request:</p>
    2257. 

  2257. 

  2258. <div class="source">
    2259. 

  2259. <div class="source">
    2260. 

  2260. <pre>  GET http://history-server-http-address:port/ws/v1/history/mapreduce/jobs/job_1326381300833_2_2/tasks/task_1326381300833_2_2_m_0
    2261. 

  2261. </pre></div></div>
    2262. 

  2262. 

  2263. <p>Response Header:</p>
    2264. 

  2264. 

  2265. <div class="source">
    2266. 

  2266. <div class="source">
    2267. 

  2267. <pre>  HTTP/1.1 200 OK
    2268. 

  2268.   Content-Type: application/json
    2269. 

  2269.   Transfer-Encoding: chunked
    2270. 

  2270.   Server: Jetty(6.1.26)
    2271. 

  2271. </pre></div></div>
    2272. 

  2272. 

  2273. <p>Response Body:</p>
    2274. 

  2274. 

  2275. <div class="source">
    2276. 

  2276. <div class="source">
    2277. 

  2277. <pre>{
    2278. 

  2278.    &quot;task&quot; : {
    2279. 

  2279.       &quot;progress&quot; : 100,
    2280. 

  2280.       &quot;elapsedTime&quot; : 6777,
    2281. 

  2281.       &quot;state&quot; : &quot;SUCCEEDED&quot;,
    2282. 

  2282.       &quot;startTime&quot; : 1326381446541,
    2283. 

  2283.       &quot;id&quot; : &quot;task_1326381300833_2_2_m_0&quot;,
    2284. 

  2284.       &quot;type&quot; : &quot;MAP&quot;,
    2285. 

  2285.       &quot;successfulAttempt&quot; : &quot;attempt_1326381300833_2_2_m_0_0&quot;,
    2286. 

  2286.       &quot;finishTime&quot; : 1326381453318
    2287. 

  2287.    }
    2288. 

  2288. }
    2289. 

  2289. </pre></div></div>
    2290. 

  2290. 

  2291. <p><b>XML response</b></p>
    2292. 

  2292. <p>HTTP Request:</p>
    2293. 

  2293. 

  2294. <div class="source">
    2295. 

  2295. <div class="source">
    2296. 

  2296. <pre>  GET http://history-server-http-address:port/ws/v1/history/mapreduce/jobs/job_1326381300833_2_2/tasks/task_1326381300833_2_2_m_0
    2297. 

  2297.   Accept: application/xml
    2298. 

  2298. </pre></div></div>
    2299. 

  2299. 

  2300. <p>Response Header:</p>
    2301. 

  2301. 

  2302. <div class="source">
    2303. 

  2303. <div class="source">
    2304. 

  2304. <pre>  HTTP/1.1 200 OK
    2305. 

  2305.   Content-Type: application/xml
    2306. 

  2306.   Content-Length: 299
    2307. 

  2307.   Server: Jetty(6.1.26)
    2308. 

  2308. </pre></div></div>
    2309. 

  2309. 

  2310. <p>Response Body:</p>
    2311. 

  2311. 

  2312. <div class="source">
    2313. 

  2313. <div class="source">
    2314. 

  2314. <pre>&lt;?xml version=&quot;1.0&quot; encoding=&quot;UTF-8&quot; standalone=&quot;yes&quot;?&gt;
    2315. 

  2315. &lt;task&gt;
    2316. 

  2316.   &lt;startTime&gt;1326381446541&lt;/startTime&gt;
    2317. 

  2317.   &lt;finishTime&gt;1326381453318&lt;/finishTime&gt;
    2318. 

  2318.   &lt;elapsedTime&gt;6777&lt;/elapsedTime&gt;
    2319. 

  2319.   &lt;progress&gt;100.0&lt;/progress&gt;
    2320. 

  2320.   &lt;id&gt;task_1326381300833_2_2_m_0&lt;/id&gt;
    2321. 

  2321.   &lt;state&gt;SUCCEEDED&lt;/state&gt;
    2322. 

  2322.   &lt;type&gt;MAP&lt;/type&gt;
    2323. 

  2323.   &lt;successfulAttempt&gt;attempt_1326381300833_2_2_m_0_0&lt;/successfulAttempt&gt;
    2324. 

  2324. &lt;/task&gt;
    2325. 

  2325. </pre></div></div>
    2326. 

  2326. </section></section><section>
    2327. 

  2327. <h3><a name="Task_Counters_API"></a>Task Counters API</h3>
    2328. 

  2328. <p>With the task counters API, you can object a collection of resources that represent all the counters for that task.</p><section>
    2329. 

  2329. <h4><a name="URI"></a>URI</h4>
    2330. 

  2330. <ul>
    2331. 

  2331. 

  2332. <li><a class="externalLink" href="http://history-server-http-address:port/ws/v1/history/mapreduce/jobs/{jobid}/tasks/{taskid}/counters">http://history-server-http-address:port/ws/v1/history/mapreduce/jobs/{jobid}/tasks/{taskid}/counters</a></li>
    2333. 

  2333. </ul></section><section>
    2334. 

  2334. <h4><a name="HTTP_Operations_Supported"></a>HTTP Operations Supported</h4>
    2335. 

  2335. <ul>
    2336. 

  2336. 

  2337. <li>GET</li>
    2338. 

  2338. </ul></section><section>
    2339. 

  2339. <h4><a name="Query_Parameters_Supported"></a>Query Parameters Supported</h4>
    2340. 

  2340. 

  2341. <div class="source">
    2342. 

  2342. <div class="source">
    2343. 

  2343. <pre>  None
    2344. 

  2344. </pre></div></div>
    2345. 

  2345. </section><section>
    2346. 

  2346. <h4><a name="Elements_of_the_jobTaskCounters_object"></a>Elements of the <i>jobTaskCounters</i> object</h4>
    2347. 

  2347. <table border="0" class="bodyTable">
    2348. 

  2348. <thead>
    2349. 

  2349. 

  2350. <tr class="a">
    2351. 

  2351. <th align="left"> Item </th>
    2352. 

  2352. <th align="left"> Data Type </th>
    2353. 

  2353. <th align="left"> Description </th></tr>
    2354. 

  2354. </thead><tbody>
    2355. 

  2355. 

  2356. <tr class="b">
    2357. 

  2357. <td align="left"> id </td>
    2358. 

  2358. <td align="left"> string </td>
    2359. 

  2359. <td align="left"> The task id </td></tr>
    2360. 

  2360. <tr class="a">
    2361. 

  2361. <td align="left"> taskCounterGroup </td>
    2362. 

  2362. <td align="left"> array of counterGroup objects(JSON)/zero or more counterGroup objects(XML) </td>
    2363. 

  2363. <td align="left"> A collection of counter group objects </td></tr>
    2364. 

  2364. </tbody>
    2365. 

  2365. </table></section><section>
    2366. 

  2366. <h4><a name="Elements_of_the_counterGroup_object"></a>Elements of the <i>counterGroup</i> object</h4>
    2367. 

  2367. <table border="0" class="bodyTable">
    2368. 

  2368. <thead>
    2369. 

  2369. 

  2370. <tr class="a">
    2371. 

  2371. <th align="left"> Item </th>
    2372. 

  2372. <th align="left"> Data Type </th>
    2373. 

  2373. <th align="left"> Description </th></tr>
    2374. 

  2374. </thead><tbody>
    2375. 

  2375. 

  2376. <tr class="b">
    2377. 

  2377. <td align="left"> counterGroupName </td>
    2378. 

  2378. <td align="left"> string </td>
    2379. 

  2379. <td align="left"> The name of the counter group </td></tr>
    2380. 

  2380. <tr class="a">
    2381. 

  2381. <td align="left"> counter </td>
    2382. 

  2382. <td align="left"> array of counter objects(JSON)/zero or more counter objects(XML) </td>
    2383. 

  2383. <td align="left"> A collection of counter objects </td></tr>
    2384. 

  2384. </tbody>
    2385. 

  2385. </table></section><section>
    2386. 

  2386. <h4><a name="Elements_of_the_counter_object"></a>Elements of the <i>counter</i> object</h4>
    2387. 

  2387. <table border="0" class="bodyTable">
    2388. 

  2388. <thead>
    2389. 

  2389. 

  2390. <tr class="a">
    2391. 

  2391. <th align="left"> Item </th>
    2392. 

  2392. <th align="left"> Data Type </th>
    2393. 

  2393. <th align="left"> Description </th></tr>
    2394. 

  2394. </thead><tbody>
    2395. 

  2395. 

  2396. <tr class="b">
    2397. 

  2397. <td align="left"> name </td>
    2398. 

  2398. <td align="left"> string </td>
    2399. 

  2399. <td align="left"> The name of the counter </td></tr>
    2400. 

  2400. <tr class="a">
    2401. 

  2401. <td align="left"> value </td>
    2402. 

  2402. <td align="left"> long </td>
    2403. 

  2403. <td align="left"> The value of the counter </td></tr>
    2404. 

  2404. </tbody>
    2405. 

  2405. </table></section><section>
    2406. 

  2406. <h4><a name="Response_Examples"></a>Response Examples</h4>
    2407. 

  2407. <p><b>JSON response</b></p>
    2408. 

  2408. <p>HTTP Request:</p>
    2409. 

  2409. 

  2410. <div class="source">
    2411. 

  2411. <div class="source">
    2412. 

  2412. <pre>  GET http://history-server-http-address:port/ws/v1/history/mapreduce/jobs/job_1326381300833_2_2/tasks/task_1326381300833_2_2_m_0/counters
    2413. 

  2413. </pre></div></div>
    2414. 

  2414. 

  2415. <p>Response Header:</p>
    2416. 

  2416. 

  2417. <div class="source">
    2418. 

  2418. <div class="source">
    2419. 

  2419. <pre>  HTTP/1.1 200 OK
    2420. 

  2420.   Content-Type: application/json
    2421. 

  2421.   Transfer-Encoding: chunked
    2422. 

  2422.   Server: Jetty(6.1.26)
    2423. 

  2423. </pre></div></div>
    2424. 

  2424. 

  2425. <p>Response Body:</p>
    2426. 

  2426. 

  2427. <div class="source">
    2428. 

  2428. <div class="source">
    2429. 

  2429. <pre>{
    2430. 

  2430.    &quot;jobTaskCounters&quot; : {
    2431. 

  2431.       &quot;id&quot; : &quot;task_1326381300833_2_2_m_0&quot;,
    2432. 

  2432.       &quot;taskCounterGroup&quot; : [
    2433. 

  2433.          {
    2434. 

  2434.             &quot;counterGroupName&quot; : &quot;org.apache.hadoop.mapreduce.FileSystemCounter&quot;,
    2435. 

  2435.             &quot;counter&quot; : [
    2436. 

  2436.                {
    2437. 

  2437.                   &quot;value&quot; : 2363,
    2438. 

  2438.                   &quot;name&quot; : &quot;FILE_BYTES_READ&quot;
    2439. 

  2439.                },
    2440. 

  2440.                {
    2441. 

  2441.                   &quot;value&quot; : 54372,
    2442. 

  2442.                   &quot;name&quot; : &quot;FILE_BYTES_WRITTEN&quot;
    2443. 

  2443.                },
    2444. 

  2444.                {
    2445. 

  2445.                   &quot;value&quot; : 0,
    2446. 

  2446.                   &quot;name&quot; : &quot;FILE_READ_OPS&quot;
    2447. 

  2447.                },
    2448. 

  2448.                {
    2449. 

  2449.                   &quot;value&quot; : 0,
    2450. 

  2450.                   &quot;name&quot; : &quot;FILE_LARGE_READ_OPS&quot;
    2451. 

  2451.                },
    2452. 

  2452.                {
    2453. 

  2453.                   &quot;value&quot; : 0,
    2454. 

  2454.                   &quot;name&quot; : &quot;FILE_WRITE_OPS&quot;
    2455. 

  2455.                },
    2456. 

  2456.                {
    2457. 

  2457.                   &quot;value&quot; : 0,
    2458. 

  2458.                   &quot;name&quot; : &quot;HDFS_BYTES_READ&quot;
    2459. 

  2459.                },
    2460. 

  2460.                {
    2461. 

  2461.                   &quot;value&quot; : 0,
    2462. 

  2462.                   &quot;name&quot; : &quot;HDFS_BYTES_WRITTEN&quot;
    2463. 

  2463.                },
    2464. 

  2464.                {
    2465. 

  2465.                   &quot;value&quot; : 0,
    2466. 

  2466.                   &quot;name&quot; : &quot;HDFS_READ_OPS&quot;
    2467. 

  2467.                },
    2468. 

  2468.                {
    2469. 

  2469.                   &quot;value&quot; : 0,
    2470. 

  2470.                   &quot;name&quot; : &quot;HDFS_LARGE_READ_OPS&quot;
    2471. 

  2471.                },
    2472. 

  2472.                {
    2473. 

  2473.                   &quot;value&quot; : 0,
    2474. 

  2474.                   &quot;name&quot; : &quot;HDFS_WRITE_OPS&quot;
    2475. 

  2475.                }
    2476. 

  2476.             ]
    2477. 

  2477.          },
    2478. 

  2478.          {
    2479. 

  2479.             &quot;counterGroupName&quot; : &quot;org.apache.hadoop.mapreduce.TaskCounter&quot;,
    2480. 

  2480.             &quot;counter&quot; : [
    2481. 

  2481.                {
    2482. 

  2482.                   &quot;value&quot; : 0,
    2483. 

  2483.                   &quot;name&quot; : &quot;COMBINE_INPUT_RECORDS&quot;
    2484. 

  2484.                },
    2485. 

  2485.                {
    2486. 

  2486.                   &quot;value&quot; : 0,
    2487. 

  2487.                   &quot;name&quot; : &quot;COMBINE_OUTPUT_RECORDS&quot;
    2488. 

  2488.                },
    2489. 

  2489.                {
    2490. 

  2490.                   &quot;value&quot; : 460,
    2491. 

  2491.                   &quot;name&quot; : &quot;REDUCE_INPUT_GROUPS&quot;
    2492. 

  2492.                },
    2493. 

  2493.                {
    2494. 

  2494.                   &quot;value&quot; : 2235,
    2495. 

  2495.                   &quot;name&quot; : &quot;REDUCE_SHUFFLE_BYTES&quot;
    2496. 

  2496.                },
    2497. 

  2497.                {
    2498. 

  2498.                   &quot;value&quot; : 460,
    2499. 

  2499.                   &quot;name&quot; : &quot;REDUCE_INPUT_RECORDS&quot;
    2500. 

  2500.                },
    2501. 

  2501.                {
    2502. 

  2502.                   &quot;value&quot; : 0,
    2503. 

  2503.                   &quot;name&quot; : &quot;REDUCE_OUTPUT_RECORDS&quot;
    2504. 

  2504.                },
    2505. 

  2505.                {
    2506. 

  2506.                   &quot;value&quot; : 0,
    2507. 

  2507.                   &quot;name&quot; : &quot;SPILLED_RECORDS&quot;
    2508. 

  2508.                },
    2509. 

  2509.                {
    2510. 

  2510.                   &quot;value&quot; : 1,
    2511. 

  2511.                   &quot;name&quot; : &quot;SHUFFLED_MAPS&quot;
    2512. 

  2512.                },
    2513. 

  2513.                {
    2514. 

  2514.                   &quot;value&quot; : 0,
    2515. 

  2515.                   &quot;name&quot; : &quot;FAILED_SHUFFLE&quot;
    2516. 

  2516.                },
    2517. 

  2517.                {
    2518. 

  2518.                   &quot;value&quot; : 1,
    2519. 

  2519.                   &quot;name&quot; : &quot;MERGED_MAP_OUTPUTS&quot;
    2520. 

  2520.                },
    2521. 

  2521.                {
    2522. 

  2522.                   &quot;value&quot; : 26,
    2523. 

  2523.                   &quot;name&quot; : &quot;GC_TIME_MILLIS&quot;
    2524. 

  2524.                },
    2525. 

  2525.                {
    2526. 

  2526.                   &quot;value&quot; : 860,
    2527. 

  2527.                   &quot;name&quot; : &quot;CPU_MILLISECONDS&quot;
    2528. 

  2528.                },
    2529. 

  2529.                {
    2530. 

  2530.                   &quot;value&quot; : 107839488,
    2531. 

  2531.                   &quot;name&quot; : &quot;PHYSICAL_MEMORY_BYTES&quot;
    2532. 

  2532.                },
    2533. 

  2533.                {
    2534. 

  2534.                   &quot;value&quot; : 1123147776,
    2535. 

  2535.                   &quot;name&quot; : &quot;VIRTUAL_MEMORY_BYTES&quot;
    2536. 

  2536.                },
    2537. 

  2537.                {
    2538. 

  2538.                   &quot;value&quot; : 57475072,
    2539. 

  2539.                   &quot;name&quot; : &quot;COMMITTED_HEAP_BYTES&quot;
    2540. 

  2540.                }
    2541. 

  2541.             ]
    2542. 

  2542.          },
    2543. 

  2543.          {
    2544. 

  2544.             &quot;counterGroupName&quot; : &quot;Shuffle Errors&quot;,
    2545. 

  2545.             &quot;counter&quot; : [
    2546. 

  2546.                {
    2547. 

  2547.                   &quot;value&quot; : 0,
    2548. 

  2548.                   &quot;name&quot; : &quot;BAD_ID&quot;
    2549. 

  2549.                },
    2550. 

  2550.                {
    2551. 

  2551.                   &quot;value&quot; : 0,
    2552. 

  2552.                   &quot;name&quot; : &quot;CONNECTION&quot;
    2553. 

  2553.                },
    2554. 

  2554.                {
    2555. 

  2555.                   &quot;value&quot; : 0,
    2556. 

  2556.                   &quot;name&quot; : &quot;IO_ERROR&quot;
    2557. 

  2557.                },
    2558. 

  2558.                {
    2559. 

  2559.                   &quot;value&quot; : 0,
    2560. 

  2560.                   &quot;name&quot; : &quot;WRONG_LENGTH&quot;
    2561. 

  2561.                },
    2562. 

  2562.                {
    2563. 

  2563.                   &quot;value&quot; : 0,
    2564. 

  2564.                   &quot;name&quot; : &quot;WRONG_MAP&quot;
    2565. 

  2565.                },
    2566. 

  2566.                {
    2567. 

  2567.                   &quot;value&quot; : 0,
    2568. 

  2568.                   &quot;name&quot; : &quot;WRONG_REDUCE&quot;
    2569. 

  2569.                }
    2570. 

  2570.             ]
    2571. 

  2571.          },
    2572. 

  2572.          {
    2573. 

  2573.             &quot;counterGroupName&quot; : &quot;org.apache.hadoop.mapreduce.lib.output.FileOutputFormatCounter&quot;,
    2574. 

  2574.             &quot;counter&quot; : [
    2575. 

  2575.                {
    2576. 

  2576.                   &quot;value&quot; : 0,
    2577. 

  2577.                   &quot;name&quot; : &quot;BYTES_WRITTEN&quot;
    2578. 

  2578.                }
    2579. 

  2579.             ]
    2580. 

  2580.          }
    2581. 

  2581.       ]
    2582. 

  2582.    }
    2583. 

  2583. }
    2584. 

  2584. </pre></div></div>
    2585. 

  2585. 

  2586. <p><b>XML response</b></p>
    2587. 

  2587. <p>HTTP Request:</p>
    2588. 

  2588. 

  2589. <div class="source">
    2590. 

  2590. <div class="source">
    2591. 

  2591. <pre>  GET http://history-server-http-address:port/ws/v1/history/mapreduce/jobs/job_1326381300833_2_2/tasks/task_1326381300833_2_2_m_0/counters
    2592. 

  2592.   Accept: application/xml
    2593. 

  2593. </pre></div></div>
    2594. 

  2594. 

  2595. <p>Response Header:</p>
    2596. 

  2596. 

  2597. <div class="source">
    2598. 

  2598. <div class="source">
    2599. 

  2599. <pre>  HTTP/1.1 200 OK
    2600. 

  2600.   Content-Type: application/xml
    2601. 

  2601.   Content-Length: 2660
    2602. 

  2602.   Server: Jetty(6.1.26)
    2603. 

  2603. </pre></div></div>
    2604. 

  2604. 

  2605. <p>Response Body:</p>
    2606. 

  2606. 

  2607. <div class="source">
    2608. 

  2608. <div class="source">
    2609. 

  2609. <pre>&lt;?xml version=&quot;1.0&quot; encoding=&quot;UTF-8&quot; standalone=&quot;yes&quot;?&gt;
    2610. 

  2610. &lt;jobTaskCounters&gt;
    2611. 

  2611.   &lt;id&gt;task_1326381300833_2_2_m_0&lt;/id&gt;
    2612. 

  2612.   &lt;taskCounterGroup&gt;
    2613. 

  2613.     &lt;counterGroupName&gt;org.apache.hadoop.mapreduce.FileSystemCounter&lt;/counterGroupName&gt;
    2614. 

  2614.     &lt;counter&gt;
    2615. 

  2615.       &lt;name&gt;FILE_BYTES_READ&lt;/name&gt;
    2616. 

  2616.       &lt;value&gt;2363&lt;/value&gt;
    2617. 

  2617.     &lt;/counter&gt;
    2618. 

  2618.     &lt;counter&gt;
    2619. 

  2619.       &lt;name&gt;FILE_BYTES_WRITTEN&lt;/name&gt;
    2620. 

  2620.       &lt;value&gt;54372&lt;/value&gt;
    2621. 

  2621.     &lt;/counter&gt;
    2622. 

  2622.     &lt;counter&gt;
    2623. 

  2623.       &lt;name&gt;FILE_READ_OPS&lt;/name&gt;
    2624. 

  2624.       &lt;value&gt;0&lt;/value&gt;
    2625. 

  2625.     &lt;/counter&gt;
    2626. 

  2626.     &lt;counter&gt;
    2627. 

  2627.       &lt;name&gt;FILE_LARGE_READ_OPS&lt;/name&gt;
    2628. 

  2628.       &lt;value&gt;0&lt;/value&gt;
    2629. 

  2629.     &lt;/counter&gt;
    2630. 

  2630.     &lt;counter&gt;
    2631. 

  2631.       &lt;name&gt;FILE_WRITE_OPS&lt;/name&gt;
    2632. 

  2632.       &lt;value&gt;0&lt;/value&gt;
    2633. 

  2633.     &lt;/counter&gt;
    2634. 

  2634.     &lt;counter&gt;
    2635. 

  2635.       &lt;name&gt;HDFS_BYTES_READ&lt;/name&gt;
    2636. 

  2636.       &lt;value&gt;0&lt;/value&gt;
    2637. 

  2637.     &lt;/counter&gt;
    2638. 

  2638.     &lt;counter&gt;
    2639. 

  2639.       &lt;name&gt;HDFS_BYTES_WRITTEN&lt;/name&gt;
    2640. 

  2640.       &lt;value&gt;0&lt;/value&gt;
    2641. 

  2641.     &lt;/counter&gt;
    2642. 

  2642.     &lt;counter&gt;
    2643. 

  2643.       &lt;name&gt;HDFS_READ_OPS&lt;/name&gt;
    2644. 

  2644.       &lt;value&gt;0&lt;/value&gt;
    2645. 

  2645.     &lt;/counter&gt;
    2646. 

  2646.     &lt;counter&gt;
    2647. 

  2647.       &lt;name&gt;HDFS_LARGE_READ_OPS&lt;/name&gt;
    2648. 

  2648.       &lt;value&gt;0&lt;/value&gt;
    2649. 

  2649.     &lt;/counter&gt;
    2650. 

  2650.     &lt;counter&gt;
    2651. 

  2651.       &lt;name&gt;HDFS_WRITE_OPS&lt;/name&gt;
    2652. 

  2652.       &lt;value&gt;0&lt;/value&gt;
    2653. 

  2653.     &lt;/counter&gt;
    2654. 

  2654.   &lt;/taskCounterGroup&gt;
    2655. 

  2655.   &lt;taskCounterGroup&gt;
    2656. 

  2656.     &lt;counterGroupName&gt;org.apache.hadoop.mapreduce.TaskCounter&lt;/counterGroupName&gt;
    2657. 

  2657.     &lt;counter&gt;
    2658. 

  2658.       &lt;name&gt;COMBINE_INPUT_RECORDS&lt;/name&gt;
    2659. 

  2659.       &lt;value&gt;0&lt;/value&gt;
    2660. 

  2660.     &lt;/counter&gt;
    2661. 

  2661.     &lt;counter&gt;
    2662. 

  2662.       &lt;name&gt;COMBINE_OUTPUT_RECORDS&lt;/name&gt;
    2663. 

  2663.       &lt;value&gt;0&lt;/value&gt;
    2664. 

  2664.     &lt;/counter&gt;
    2665. 

  2665.     &lt;counter&gt;
    2666. 

  2666.       &lt;name&gt;REDUCE_INPUT_GROUPS&lt;/name&gt;
    2667. 

  2667.       &lt;value&gt;460&lt;/value&gt;
    2668. 

  2668.     &lt;/counter&gt;
    2669. 

  2669.     &lt;counter&gt;
    2670. 

  2670.       &lt;name&gt;REDUCE_SHUFFLE_BYTES&lt;/name&gt;
    2671. 

  2671.       &lt;value&gt;2235&lt;/value&gt;
    2672. 

  2672.     &lt;/counter&gt;
    2673. 

  2673.     &lt;counter&gt;
    2674. 

  2674.       &lt;name&gt;REDUCE_INPUT_RECORDS&lt;/name&gt;
    2675. 

  2675.       &lt;value&gt;460&lt;/value&gt;
    2676. 

  2676.     &lt;/counter&gt;
    2677. 

  2677.     &lt;counter&gt;
    2678. 

  2678.       &lt;name&gt;REDUCE_OUTPUT_RECORDS&lt;/name&gt;
    2679. 

  2679.       &lt;value&gt;0&lt;/value&gt;
    2680. 

  2680.     &lt;/counter&gt;
    2681. 

  2681.     &lt;counter&gt;
    2682. 

  2682.       &lt;name&gt;SPILLED_RECORDS&lt;/name&gt;
    2683. 

  2683.       &lt;value&gt;0&lt;/value&gt;
    2684. 

  2684.     &lt;/counter&gt;
    2685. 

  2685.     &lt;counter&gt;
    2686. 

  2686.       &lt;name&gt;SHUFFLED_MAPS&lt;/name&gt;
    2687. 

  2687.       &lt;value&gt;1&lt;/value&gt;
    2688. 

  2688.     &lt;/counter&gt;
    2689. 

  2689.     &lt;counter&gt;
    2690. 

  2690.       &lt;name&gt;FAILED_SHUFFLE&lt;/name&gt;
    2691. 

  2691.       &lt;value&gt;0&lt;/value&gt;
    2692. 

  2692.     &lt;/counter&gt;
    2693. 

  2693.     &lt;counter&gt;
    2694. 

  2694.       &lt;name&gt;MERGED_MAP_OUTPUTS&lt;/name&gt;
    2695. 

  2695.       &lt;value&gt;1&lt;/value&gt;
    2696. 

  2696.     &lt;/counter&gt;
    2697. 

  2697.     &lt;counter&gt;
    2698. 

  2698.       &lt;name&gt;GC_TIME_MILLIS&lt;/name&gt;
    2699. 

  2699.       &lt;value&gt;26&lt;/value&gt;
    2700. 

  2700.     &lt;/counter&gt;
    2701. 

  2701.     &lt;counter&gt;
    2702. 

  2702.       &lt;name&gt;CPU_MILLISECONDS&lt;/name&gt;
    2703. 

  2703.       &lt;value&gt;860&lt;/value&gt;
    2704. 

  2704.     &lt;/counter&gt;
    2705. 

  2705.     &lt;counter&gt;
    2706. 

  2706.       &lt;name&gt;PHYSICAL_MEMORY_BYTES&lt;/name&gt;
    2707. 

  2707.       &lt;value&gt;107839488&lt;/value&gt;
    2708. 

  2708.     &lt;/counter&gt;
    2709. 

  2709.     &lt;counter&gt;
    2710. 

  2710.       &lt;name&gt;VIRTUAL_MEMORY_BYTES&lt;/name&gt;
    2711. 

  2711.       &lt;value&gt;1123147776&lt;/value&gt;
    2712. 

  2712.     &lt;/counter&gt;
    2713. 

  2713.     &lt;counter&gt;
    2714. 

  2714.       &lt;name&gt;COMMITTED_HEAP_BYTES&lt;/name&gt;
    2715. 

  2715.       &lt;value&gt;57475072&lt;/value&gt;
    2716. 

  2716.     &lt;/counter&gt;
    2717. 

  2717.   &lt;/taskCounterGroup&gt;
    2718. 

  2718.   &lt;taskCounterGroup&gt;
    2719. 

  2719.     &lt;counterGroupName&gt;Shuffle Errors&lt;/counterGroupName&gt;
    2720. 

  2720.     &lt;counter&gt;
    2721. 

  2721.       &lt;name&gt;BAD_ID&lt;/name&gt;
    2722. 

  2722.       &lt;value&gt;0&lt;/value&gt;
    2723. 

  2723.     &lt;/counter&gt;
    2724. 

  2724.     &lt;counter&gt;
    2725. 

  2725.       &lt;name&gt;CONNECTION&lt;/name&gt;
    2726. 

  2726.       &lt;value&gt;0&lt;/value&gt;
    2727. 

  2727.     &lt;/counter&gt;
    2728. 

  2728.     &lt;counter&gt;
    2729. 

  2729.       &lt;name&gt;IO_ERROR&lt;/name&gt;
    2730. 

  2730.       &lt;value&gt;0&lt;/value&gt;
    2731. 

  2731.     &lt;/counter&gt;
    2732. 

  2732.     &lt;counter&gt;
    2733. 

  2733.       &lt;name&gt;WRONG_LENGTH&lt;/name&gt;
    2734. 

  2734.       &lt;value&gt;0&lt;/value&gt;
    2735. 

  2735.     &lt;/counter&gt;
    2736. 

  2736.     &lt;counter&gt;
    2737. 

  2737.       &lt;name&gt;WRONG_MAP&lt;/name&gt;
    2738. 

  2738.       &lt;value&gt;0&lt;/value&gt;
    2739. 

  2739.     &lt;/counter&gt;
    2740. 

  2740.     &lt;counter&gt;
    2741. 

  2741.       &lt;name&gt;WRONG_REDUCE&lt;/name&gt;
    2742. 

  2742.       &lt;value&gt;0&lt;/value&gt;
    2743. 

  2743.     &lt;/counter&gt;
    2744. 

  2744.   &lt;/taskCounterGroup&gt;
    2745. 

  2745.   &lt;taskCounterGroup&gt;
    2746. 

  2746.     &lt;counterGroupName&gt;org.apache.hadoop.mapreduce.lib.output.FileOutputFormatCounter&lt;/counterGroupName&gt;
    2747. 

  2747.     &lt;counter&gt;
    2748. 

  2748.       &lt;name&gt;BYTES_WRITTEN&lt;/name&gt;
    2749. 

  2749.       &lt;value&gt;0&lt;/value&gt;
    2750. 

  2750.     &lt;/counter&gt;
    2751. 

  2751.   &lt;/taskCounterGroup&gt;
    2752. 

  2752. &lt;/jobTaskCounters&gt;
    2753. 

  2753. </pre></div></div>
    2754. 

  2754. </section></section><section>
    2755. 

  2755. <h3><a name="Task_Attempts_API"></a>Task Attempts API</h3>
    2756. 

  2756. <p>With the task attempts API, you can obtain a collection of resources that represent a task attempt within a job. When you run a GET operation on this resource, you obtain a collection of Task Attempt Objects.</p><section>
    2757. 

  2757. <h4><a name="URI"></a>URI</h4>
    2758. 

  2758. <ul>
    2759. 

  2759. 

  2760. <li><a class="externalLink" href="http://history-server-http-address:port/ws/v1/history/mapreduce/jobs/{jobid}/tasks/{taskid}/attempts">http://history-server-http-address:port/ws/v1/history/mapreduce/jobs/{jobid}/tasks/{taskid}/attempts</a></li>
    2761. 

  2761. </ul></section><section>
    2762. 

  2762. <h4><a name="HTTP_Operations_Supported"></a>HTTP Operations Supported</h4>
    2763. 

  2763. <ul>
    2764. 

  2764. 

  2765. <li>GET</li>
    2766. 

  2766. </ul></section><section>
    2767. 

  2767. <h4><a name="Query_Parameters_Supported"></a>Query Parameters Supported</h4>
    2768. 

  2768. 

  2769. <div class="source">
    2770. 

  2770. <div class="source">
    2771. 

  2771. <pre>  None
    2772. 

  2772. </pre></div></div>
    2773. 

  2773. </section><section>
    2774. 

  2774. <h4><a name="Elements_of_the_taskAttempts_object"></a>Elements of the <i>taskAttempts</i> object</h4>
    2775. 

  2775. <p>When you make a request for the list of task attempts, the information will be returned as an array of task attempt objects. See also <a href="#Task_Attempt_API">Task Attempt API</a> for syntax of the task object.</p>
    2776. 

  2776. <table border="0" class="bodyTable">
    2777. 

  2777. <thead>
    2778. 

  2778. 

  2779. <tr class="a">
    2780. 

  2780. <th align="left"> Item </th>
    2781. 

  2781. <th align="left"> Data Type </th>
    2782. 

  2782. <th align="left"> Description </th></tr>
    2783. 

  2783. </thead><tbody>
    2784. 

  2784. 

  2785. <tr class="b">
    2786. 

  2786. <td align="left"> taskAttempt </td>
    2787. 

  2787. <td align="left"> array of task attempt objects(JSON)/zero or more task attempt objects(XML) </td>
    2788. 

  2788. <td align="left"> The collection of task attempt objects </td></tr>
    2789. 

  2789. </tbody>
    2790. 

  2790. </table></section><section>
    2791. 

  2791. <h4><a name="Response_Examples"></a>Response Examples</h4>
    2792. 

  2792. <p><b>JSON response</b></p>
    2793. 

  2793. <p>HTTP Request:</p>
    2794. 

  2794. 

  2795. <div class="source">
    2796. 

  2796. <div class="source">
    2797. 

  2797. <pre>  GET http://history-server-http-address:port/ws/v1/history/mapreduce/jobs/job_1326381300833_2_2/tasks/task_1326381300833_2_2_m_0/attempts
    2798. 

  2798. </pre></div></div>
    2799. 

  2799. 

  2800. <p>Response Header:</p>
    2801. 

  2801. 

  2802. <div class="source">
    2803. 

  2803. <div class="source">
    2804. 

  2804. <pre>  HTTP/1.1 200 OK
    2805. 

  2805.   Content-Type: application/json
    2806. 

  2806.   Transfer-Encoding: chunked
    2807. 

  2807.   Server: Jetty(6.1.26)
    2808. 

  2808. </pre></div></div>
    2809. 

  2809. 

  2810. <p>Response Body:</p>
    2811. 

  2811. 

  2812. <div class="source">
    2813. 

  2813. <div class="source">
    2814. 

  2814. <pre>{
    2815. 

  2815.    &quot;taskAttempts&quot; : {
    2816. 

  2816.       &quot;taskAttempt&quot; : [
    2817. 

  2817.          {
    2818. 

  2818.             &quot;assignedContainerId&quot; : &quot;container_1326381300833_0002_01_000002&quot;,
    2819. 

  2819.             &quot;progress&quot; : 100,
    2820. 

  2820.             &quot;elapsedTime&quot; : 2638,
    2821. 

  2821.             &quot;state&quot; : &quot;SUCCEEDED&quot;,
    2822. 

  2822.             &quot;diagnostics&quot; : &quot;&quot;,
    2823. 

  2823.             &quot;rack&quot; : &quot;/98.139.92.0&quot;,
    2824. 

  2824.             &quot;nodeHttpAddress&quot; : &quot;host.domain.com:8042&quot;,
    2825. 

  2825.             &quot;startTime&quot; : 1326381450680,
    2826. 

  2826.             &quot;id&quot; : &quot;attempt_1326381300833_2_2_m_0_0&quot;,
    2827. 

  2827.             &quot;type&quot; : &quot;MAP&quot;,
    2828. 

  2828.             &quot;finishTime&quot; : 1326381453318
    2829. 

  2829.          }
    2830. 

  2830.       ]
    2831. 

  2831.    }
    2832. 

  2832. }
    2833. 

  2833. </pre></div></div>
    2834. 

  2834. 

  2835. <p><b>XML response</b></p>
    2836. 

  2836. <p>HTTP Request:</p>
    2837. 

  2837. 

  2838. <div class="source">
    2839. 

  2839. <div class="source">
    2840. 

  2840. <pre>  GET http://history-server-http-address:port/ws/v1/history/mapreduce/jobs/job_1326381300833_2_2/tasks/task_1326381300833_2_2_m_0/attempts
    2841. 

  2841.   Accept: application/xml
    2842. 

  2842. </pre></div></div>
    2843. 

  2843. 

  2844. <p>Response Header:</p>
    2845. 

  2845. 

  2846. <div class="source">
    2847. 

  2847. <div class="source">
    2848. 

  2848. <pre>  HTTP/1.1 200 OK
    2849. 

  2849.   Content-Type: application/xml
    2850. 

  2850.   Content-Length: 537
    2851. 

  2851.   Server: Jetty(6.1.26)
    2852. 

  2852. </pre></div></div>
    2853. 

  2853. 

  2854. <p>Response Body:</p>
    2855. 

  2855. 

  2856. <div class="source">
    2857. 

  2857. <div class="source">
    2858. 

  2858. <pre>&lt;?xml version=&quot;1.0&quot; encoding=&quot;UTF-8&quot; standalone=&quot;yes&quot;?&gt;
    2859. 

  2859. &lt;taskAttempts&gt;
    2860. 

  2860.   &lt;taskAttempt&gt;
    2861. 

  2861.     &lt;startTime&gt;1326381450680&lt;/startTime&gt;
    2862. 

  2862.     &lt;finishTime&gt;1326381453318&lt;/finishTime&gt;
    2863. 

  2863.     &lt;elapsedTime&gt;2638&lt;/elapsedTime&gt;
    2864. 

  2864.     &lt;progress&gt;100.0&lt;/progress&gt;
    2865. 

  2865.     &lt;id&gt;attempt_1326381300833_2_2_m_0_0&lt;/id&gt;
    2866. 

  2866.     &lt;rack&gt;/98.139.92.0&lt;/rack&gt;
    2867. 

  2867.     &lt;state&gt;SUCCEEDED&lt;/state&gt;
    2868. 

  2868.     &lt;nodeHttpAddress&gt;host.domain.com:8042&lt;/nodeHttpAddress&gt;
    2869. 

  2869.     &lt;diagnostics/&gt;
    2870. 

  2870.     &lt;type&gt;MAP&lt;/type&gt;
    2871. 

  2871.     &lt;assignedContainerId&gt;container_1326381300833_0002_01_000002&lt;/assignedContainerId&gt;
    2872. 

  2872.   &lt;/taskAttempt&gt;
    2873. 

  2873. &lt;/taskAttempts&gt;
    2874. 

  2874. </pre></div></div>
    2875. 

  2875. </section></section><section>
    2876. 

  2876. <h3><a name="Task_Attempt_API"></a>Task Attempt API</h3>
    2877. 

  2877. <p>A Task Attempt resource contains information about a particular task attempt within a job.</p><section>
    2878. 

  2878. <h4><a name="URI"></a>URI</h4>
    2879. 

  2879. <p>Use the following URI to obtain an Task Attempt Object, from a task identified by the attemptid value.</p>
    2880. 

  2880. <ul>
    2881. 

  2881. 

  2882. <li><a class="externalLink" href="http://history-server-http-address:port/ws/v1/history/mapreduce/jobs/{jobid}/tasks/{taskid}/attempts/{attemptid}">http://history-server-http-address:port/ws/v1/history/mapreduce/jobs/{jobid}/tasks/{taskid}/attempts/{attemptid}</a></li>
    2883. 

  2883. </ul></section><section>
    2884. 

  2884. <h4><a name="HTTP_Operations_Supported"></a>HTTP Operations Supported</h4>
    2885. 

  2885. <ul>
    2886. 

  2886. 

  2887. <li>GET</li>
    2888. 

  2888. </ul></section><section>
    2889. 

  2889. <h4><a name="Query_Parameters_Supported"></a>Query Parameters Supported</h4>
    2890. 

  2890. 

  2891. <div class="source">
    2892. 

  2892. <div class="source">
    2893. 

  2893. <pre>  None
    2894. 

  2894. </pre></div></div>
    2895. 

  2895. </section><section>
    2896. 

  2896. <h4><a name="Elements_of_the_taskAttempt_object"></a>Elements of the <i>taskAttempt</i> object</h4>
    2897. 

  2897. <table border="0" class="bodyTable">
    2898. 

  2898. <thead>
    2899. 

  2899. 

  2900. <tr class="a">
    2901. 

  2901. <th align="left"> Item </th>
    2902. 

  2902. <th align="left"> Data Type </th>
    2903. 

  2903. <th align="left"> Description </th></tr>
    2904. 

  2904. </thead><tbody>
    2905. 

  2905. 

  2906. <tr class="b">
    2907. 

  2907. <td align="left"> id </td>
    2908. 

  2908. <td align="left"> string </td>
    2909. 

  2909. <td align="left"> The task id </td></tr>
    2910. 

  2910. <tr class="a">
    2911. 

  2911. <td align="left"> rack </td>
    2912. 

  2912. <td align="left"> string </td>
    2913. 

  2913. <td align="left"> The rack </td></tr>
    2914. 

  2914. <tr class="b">
    2915. 

  2915. <td align="left"> state </td>
    2916. 

  2916. <td align="left"> string </td>
    2917. 

  2917. <td align="left"> The state of the task attempt - valid values are: NEW, UNASSIGNED, ASSIGNED, RUNNING, COMMIT_PENDING, SUCCESS_CONTAINER_CLEANUP, SUCCEEDED, FAIL_CONTAINER_CLEANUP, FAIL_TASK_CLEANUP, FAILED, KILL_CONTAINER_CLEANUP, KILL_TASK_CLEANUP, KILLED </td></tr>
    2918. 

  2918. <tr class="a">
    2919. 

  2919. <td align="left"> type </td>
    2920. 

  2920. <td align="left"> string </td>
    2921. 

  2921. <td align="left"> The type of task </td></tr>
    2922. 

  2922. <tr class="b">
    2923. 

  2923. <td align="left"> assignedContainerId </td>
    2924. 

  2924. <td align="left"> string </td>
    2925. 

  2925. <td align="left"> The container id this attempt is assigned to </td></tr>
    2926. 

  2926. <tr class="a">
    2927. 

  2927. <td align="left"> nodeHttpAddress </td>
    2928. 

  2928. <td align="left"> string </td>
    2929. 

  2929. <td align="left"> The http address of the node this task attempt ran on </td></tr>
    2930. 

  2930. <tr class="b">
    2931. 

  2931. <td align="left"> diagnostics </td>
    2932. 

  2932. <td align="left"> string </td>
    2933. 

  2933. <td align="left"> A diagnostics message </td></tr>
    2934. 

  2934. <tr class="a">
    2935. 

  2935. <td align="left"> progress </td>
    2936. 

  2936. <td align="left"> float </td>
    2937. 

  2937. <td align="left"> The progress of the task attempt as a percent </td></tr>
    2938. 

  2938. <tr class="b">
    2939. 

  2939. <td align="left"> startTime </td>
    2940. 

  2940. <td align="left"> long </td>
    2941. 

  2941. <td align="left"> The time in which the task attempt started (in ms since epoch) </td></tr>
    2942. 

  2942. <tr class="a">
    2943. 

  2943. <td align="left"> finishTime </td>
    2944. 

  2944. <td align="left"> long </td>
    2945. 

  2945. <td align="left"> The time in which the task attempt finished (in ms since epoch) </td></tr>
    2946. 

  2946. <tr class="b">
    2947. 

  2947. <td align="left"> elapsedTime </td>
    2948. 

  2948. <td align="left"> long </td>
    2949. 

  2949. <td align="left"> The elapsed time since the task attempt started (in ms) </td></tr>
    2950. 

  2950. </tbody>
    2951. 

  2951. </table>
    2952. 

  2952. <p>For reduce task attempts you also have the following fields:</p>
    2953. 

  2953. <table border="0" class="bodyTable">
    2954. 

  2954. <thead>
    2955. 

  2955. 

  2956. <tr class="a">
    2957. 

  2957. <th align="left"> Item </th>
    2958. 

  2958. <th align="left"> Data Type </th>
    2959. 

  2959. <th align="left"> Description </th></tr>
    2960. 

  2960. </thead><tbody>
    2961. 

  2961. 

  2962. <tr class="b">
    2963. 

  2963. <td align="left"> shuffleFinishTime </td>
    2964. 

  2964. <td align="left"> long </td>
    2965. 

  2965. <td align="left"> The time at which shuffle finished (in ms since epoch) </td></tr>
    2966. 

  2966. <tr class="a">
    2967. 

  2967. <td align="left"> mergeFinishTime </td>
    2968. 

  2968. <td align="left"> long </td>
    2969. 

  2969. <td align="left"> The time at which merge finished (in ms since epoch) </td></tr>
    2970. 

  2970. <tr class="b">
    2971. 

  2971. <td align="left"> elapsedShuffleTime </td>
    2972. 

  2972. <td align="left"> long </td>
    2973. 

  2973. <td align="left"> The time it took for the shuffle phase to complete (time in ms between reduce task start and shuffle finish) </td></tr>
    2974. 

  2974. <tr class="a">
    2975. 

  2975. <td align="left"> elapsedMergeTime </td>
    2976. 

  2976. <td align="left"> long </td>
    2977. 

  2977. <td align="left"> The time it took for the merge phase to complete (time in ms between the shuffle finish and merge finish) </td></tr>
    2978. 

  2978. <tr class="b">
    2979. 

  2979. <td align="left"> elapsedReduceTime </td>
    2980. 

  2980. <td align="left"> long </td>
    2981. 

  2981. <td align="left"> The time it took for the reduce phase to complete (time in ms between merge finish to end of reduce task) </td></tr>
    2982. 

  2982. </tbody>
    2983. 

  2983. </table></section><section>
    2984. 

  2984. <h4><a name="Response_Examples"></a>Response Examples</h4>
    2985. 

  2985. <p><b>JSON response</b></p>
    2986. 

  2986. <p>HTTP Request:</p>
    2987. 

  2987. 

  2988. <div class="source">
    2989. 

  2989. <div class="source">
    2990. 

  2990. <pre>  GET http://history-server-http-address:port/ws/v1/history/mapreduce/jobs/job_1326381300833_2_2/tasks/task_1326381300833_2_2_m_0/attempts/attempt_1326381300833_2_2_m_0_0
    2991. 

  2991. </pre></div></div>
    2992. 

  2992. 

  2993. <p>Response Header:</p>
    2994. 

  2994. 

  2995. <div class="source">
    2996. 

  2996. <div class="source">
    2997. 

  2997. <pre>  HTTP/1.1 200 OK
    2998. 

  2998.   Content-Type: application/json
    2999. 

  2999.   Transfer-Encoding: chunked
    3000. 

  3000.   Server: Jetty(6.1.26)
    3001. 

  3001. </pre></div></div>
    3002. 

  3002. 

  3003. <p>Response Body:</p>
    3004. 

  3004. 

  3005. <div class="source">
    3006. 

  3006. <div class="source">
    3007. 

  3007. <pre>{
    3008. 

  3008.    &quot;taskAttempt&quot; : {
    3009. 

  3009.       &quot;assignedContainerId&quot; : &quot;container_1326381300833_0002_01_000002&quot;,
    3010. 

  3010.       &quot;progress&quot; : 100,
    3011. 

  3011.       &quot;elapsedTime&quot; : 2638,
    3012. 

  3012.       &quot;state&quot; : &quot;SUCCEEDED&quot;,
    3013. 

  3013.       &quot;diagnostics&quot; : &quot;&quot;,
    3014. 

  3014.       &quot;rack&quot; : &quot;/98.139.92.0&quot;,
    3015. 

  3015.       &quot;nodeHttpAddress&quot; : &quot;host.domain.com:8042&quot;,
    3016. 

  3016.       &quot;startTime&quot; : 1326381450680,
    3017. 

  3017.       &quot;id&quot; : &quot;attempt_1326381300833_2_2_m_0_0&quot;,
    3018. 

  3018.       &quot;type&quot; : &quot;MAP&quot;,
    3019. 

  3019.       &quot;finishTime&quot; : 1326381453318
    3020. 

  3020.    }
    3021. 

  3021. }
    3022. 

  3022. </pre></div></div>
    3023. 

  3023. 

  3024. <p><b>XML response</b></p>
    3025. 

  3025. <p>HTTP Request:</p>
    3026. 

  3026. 

  3027. <div class="source">
    3028. 

  3028. <div class="source">
    3029. 

  3029. <pre>  GET http://history-server-http-address:port/ws/v1/history/mapreduce/jobs/job_1326381300833_2_2/tasks/task_1326381300833_2_2_m_0/attempts/attempt_1326381300833_2_2_m_0_0
    3030. 

  3030.   Accept: application/xml
    3031. 

  3031. </pre></div></div>
    3032. 

  3032. 

  3033. <p>Response Header:</p>
    3034. 

  3034. 

  3035. <div class="source">
    3036. 

  3036. <div class="source">
    3037. 

  3037. <pre>  HTTP/1.1 200 OK
    3038. 

  3038.   Content-Type: application/xml
    3039. 

  3039.   Content-Length: 691
    3040. 

  3040.   Server: Jetty(6.1.26)
    3041. 

  3041. </pre></div></div>
    3042. 

  3042. 

  3043. <p>Response Body:</p>
    3044. 

  3044. 

  3045. <div class="source">
    3046. 

  3046. <div class="source">
    3047. 

  3047. <pre>&lt;?xml version=&quot;1.0&quot; encoding=&quot;UTF-8&quot; standalone=&quot;yes&quot;?&gt;
    3048. 

  3048. &lt;taskAttempt&gt;
    3049. 

  3049.   &lt;startTime&gt;1326381450680&lt;/startTime&gt;
    3050. 

  3050.   &lt;finishTime&gt;1326381453318&lt;/finishTime&gt;
    3051. 

  3051.   &lt;elapsedTime&gt;2638&lt;/elapsedTime&gt;
    3052. 

  3052.   &lt;progress&gt;100.0&lt;/progress&gt;
    3053. 

  3053.   &lt;id&gt;attempt_1326381300833_2_2_m_0_0&lt;/id&gt;
    3054. 

  3054.   &lt;rack&gt;/98.139.92.0&lt;/rack&gt;
    3055. 

  3055.   &lt;state&gt;SUCCEEDED&lt;/state&gt;
    3056. 

  3056.   &lt;nodeHttpAddress&gt;host.domain.com:8042&lt;/nodeHttpAddress&gt;
    3057. 

  3057.   &lt;diagnostics/&gt;
    3058. 

  3058.   &lt;type&gt;MAP&lt;/type&gt;
    3059. 

  3059.   &lt;assignedContainerId&gt;container_1326381300833_0002_01_000002&lt;/assignedContainerId&gt;
    3060. 

  3060. &lt;/taskAttempt&gt;
    3061. 

  3061. </pre></div></div>
    3062. 

  3062. </section></section><section>
    3063. 

  3063. <h3><a name="Task_Attempt_Counters_API"></a>Task Attempt Counters API</h3>
    3064. 

  3064. <p>With the task attempt counters API, you can object a collection of resources that represent al the counters for that task attempt.</p><section>
    3065. 

  3065. <h4><a name="URI"></a>URI</h4>
    3066. 

  3066. <ul>
    3067. 

  3067. 

  3068. <li><a class="externalLink" href="http://history-server-http-address:port/ws/v1/history/mapreduce/jobs/{jobid}/tasks/{taskid}/attempts/{attemptid}/counters">http://history-server-http-address:port/ws/v1/history/mapreduce/jobs/{jobid}/tasks/{taskid}/attempts/{attemptid}/counters</a></li>
    3069. 

  3069. </ul></section><section>
    3070. 

  3070. <h4><a name="HTTP_Operations_Supported"></a>HTTP Operations Supported</h4>
    3071. 

  3071. <ul>
    3072. 

  3072. 

  3073. <li>GET</li>
    3074. 

  3074. </ul></section><section>
    3075. 

  3075. <h4><a name="Query_Parameters_Supported"></a>Query Parameters Supported</h4>
    3076. 

  3076. 

  3077. <div class="source">
    3078. 

  3078. <div class="source">
    3079. 

  3079. <pre>  None
    3080. 

  3080. </pre></div></div>
    3081. 

  3081. </section><section>
    3082. 

  3082. <h4><a name="Elements_of_the_jobTaskAttemptCounters_object"></a>Elements of the <i>jobTaskAttemptCounters</i> object</h4>
    3083. 

  3083. <table border="0" class="bodyTable">
    3084. 

  3084. <thead>
    3085. 

  3085. 

  3086. <tr class="a">
    3087. 

  3087. <th align="left"> Item </th>
    3088. 

  3088. <th align="left"> Data Type </th>
    3089. 

  3089. <th align="left"> Description </th></tr>
    3090. 

  3090. </thead><tbody>
    3091. 

  3091. 

  3092. <tr class="b">
    3093. 

  3093. <td align="left"> id </td>
    3094. 

  3094. <td align="left"> string </td>
    3095. 

  3095. <td align="left"> The task attempt id </td></tr>
    3096. 

  3096. <tr class="a">
    3097. 

  3097. <td align="left"> taskAttemptcounterGroup </td>
    3098. 

  3098. <td align="left"> array of task attempt counterGroup objects(JSON)/zero or more task attempt counterGroup objects(XML) </td>
    3099. 

  3099. <td align="left"> A collection of task attempt counter group objects </td></tr>
    3100. 

  3100. </tbody>
    3101. 

  3101. </table></section><section>
    3102. 

  3102. <h4><a name="Elements_of_the_taskAttemptCounterGroup_object"></a>Elements of the <i>taskAttemptCounterGroup</i> object</h4>
    3103. 

  3103. <table border="0" class="bodyTable">
    3104. 

  3104. <thead>
    3105. 

  3105. 

  3106. <tr class="a">
    3107. 

  3107. <th align="left"> Item </th>
    3108. 

  3108. <th align="left"> Data Type </th>
    3109. 

  3109. <th align="left"> Description </th></tr>
    3110. 

  3110. </thead><tbody>
    3111. 

  3111. 

  3112. <tr class="b">
    3113. 

  3113. <td align="left"> counterGroupName </td>
    3114. 

  3114. <td align="left"> string </td>
    3115. 

  3115. <td align="left"> The name of the counter group </td></tr>
    3116. 

  3116. <tr class="a">
    3117. 

  3117. <td align="left"> counter </td>
    3118. 

  3118. <td align="left"> array of counter objects(JSON)/zero or more counter objects(XML) </td>
    3119. 

  3119. <td align="left"> A collection of counter objects </td></tr>
    3120. 

  3120. </tbody>
    3121. 

  3121. </table></section><section>
    3122. 

  3122. <h4><a name="Elements_of_the_counter_object"></a>Elements of the <i>counter</i> object</h4>
    3123. 

  3123. <table border="0" class="bodyTable">
    3124. 

  3124. <thead>
    3125. 

  3125. 

  3126. <tr class="a">
    3127. 

  3127. <th align="left"> Item </th>
    3128. 

  3128. <th align="left"> Data Type </th>
    3129. 

  3129. <th align="left"> Description </th></tr>
    3130. 

  3130. </thead><tbody>
    3131. 

  3131. 

  3132. <tr class="b">
    3133. 

  3133. <td align="left"> name </td>
    3134. 

  3134. <td align="left"> string </td>
    3135. 

  3135. <td align="left"> The name of the counter </td></tr>
    3136. 

  3136. <tr class="a">
    3137. 

  3137. <td align="left"> value </td>
    3138. 

  3138. <td align="left"> long </td>
    3139. 

  3139. <td align="left"> The value of the counter </td></tr>
    3140. 

  3140. </tbody>
    3141. 

  3141. </table></section><section>
    3142. 

  3142. <h4><a name="Response_Examples"></a>Response Examples</h4>
    3143. 

  3143. <p><b>JSON response</b></p>
    3144. 

  3144. <p>HTTP Request:</p>
    3145. 

  3145. 

  3146. <div class="source">
    3147. 

  3147. <div class="source">
    3148. 

  3148. <pre>  GET http://history-server-http-address:port/ws/v1/history/mapreduce/jobs/job_1326381300833_2_2/tasks/task_1326381300833_2_2_m_0/attempts/attempt_1326381300833_2_2_m_0_0/counters
    3149. 

  3149. </pre></div></div>
    3150. 

  3150. 

  3151. <p>Response Header:</p>
    3152. 

  3152. 

  3153. <div class="source">
    3154. 

  3154. <div class="source">
    3155. 

  3155. <pre>  HTTP/1.1 200 OK
    3156. 

  3156.   Content-Type: application/json
    3157. 

  3157.   Transfer-Encoding: chunked
    3158. 

  3158.   Server: Jetty(6.1.26)
    3159. 

  3159. </pre></div></div>
    3160. 

  3160. 

  3161. <p>Response Body:</p>
    3162. 

  3162. 

  3163. <div class="source">
    3164. 

  3164. <div class="source">
    3165. 

  3165. <pre>{
    3166. 

  3166.    &quot;jobTaskAttemptCounters&quot; : {
    3167. 

  3167.       &quot;taskAttemptCounterGroup&quot; : [
    3168. 

  3168.          {
    3169. 

  3169.             &quot;counterGroupName&quot; : &quot;org.apache.hadoop.mapreduce.FileSystemCounter&quot;,
    3170. 

  3170.             &quot;counter&quot; : [
    3171. 

  3171.                {
    3172. 

  3172.                   &quot;value&quot; : 2363,
    3173. 

  3173.                   &quot;name&quot; : &quot;FILE_BYTES_READ&quot;
    3174. 

  3174.                },
    3175. 

  3175.                {
    3176. 

  3176.                   &quot;value&quot; : 54372,
    3177. 

  3177.                   &quot;name&quot; : &quot;FILE_BYTES_WRITTEN&quot;
    3178. 

  3178.                },
    3179. 

  3179.                {
    3180. 

  3180.                   &quot;value&quot; : 0,
    3181. 

  3181.                   &quot;name&quot; : &quot;FILE_READ_OPS&quot;
    3182. 

  3182.                },
    3183. 

  3183.                {
    3184. 

  3184.                   &quot;value&quot; : 0,
    3185. 

  3185.                   &quot;name&quot; : &quot;FILE_LARGE_READ_OPS&quot;
    3186. 

  3186.                },
    3187. 

  3187.                {
    3188. 

  3188.                   &quot;value&quot; : 0,
    3189. 

  3189.                   &quot;name&quot; : &quot;FILE_WRITE_OPS&quot;
    3190. 

  3190.                },
    3191. 

  3191.                {
    3192. 

  3192.                   &quot;value&quot; : 0,
    3193. 

  3193.                   &quot;name&quot; : &quot;HDFS_BYTES_READ&quot;
    3194. 

  3194.                },
    3195. 

  3195.                {
    3196. 

  3196.                   &quot;value&quot; : 0,
    3197. 

  3197.                   &quot;name&quot; : &quot;HDFS_BYTES_WRITTEN&quot;
    3198. 

  3198.                },
    3199. 

  3199.               {
    3200. 

  3200.                   &quot;value&quot; : 0,
    3201. 

  3201.                   &quot;name&quot; : &quot;HDFS_READ_OPS&quot;
    3202. 

  3202.                },
    3203. 

  3203.                {
    3204. 

  3204.                   &quot;value&quot; : 0,
    3205. 

  3205.                   &quot;name&quot; : &quot;HDFS_LARGE_READ_OPS&quot;
    3206. 

  3206.                },
    3207. 

  3207.                {
    3208. 

  3208.                   &quot;value&quot; : 0,
    3209. 

  3209.                   &quot;name&quot; : &quot;HDFS_WRITE_OPS&quot;
    3210. 

  3210.                }
    3211. 

  3211.             ]
    3212. 

  3212.          },
    3213. 

  3213.          {
    3214. 

  3214.             &quot;counterGroupName&quot; : &quot;org.apache.hadoop.mapreduce.TaskCounter&quot;,
    3215. 

  3215.             &quot;counter&quot; : [
    3216. 

  3216.                {
    3217. 

  3217.                   &quot;value&quot; : 0,
    3218. 

  3218.                   &quot;name&quot; : &quot;COMBINE_INPUT_RECORDS&quot;
    3219. 

  3219.                },
    3220. 

  3220.                {
    3221. 

  3221.                   &quot;value&quot; : 0,
    3222. 

  3222.                   &quot;name&quot; : &quot;COMBINE_OUTPUT_RECORDS&quot;
    3223. 

  3223.                },
    3224. 

  3224.                {
    3225. 

  3225.                   &quot;value&quot; : 460,
    3226. 

  3226.                   &quot;name&quot; : &quot;REDUCE_INPUT_GROUPS&quot;
    3227. 

  3227.                },
    3228. 

  3228.                {
    3229. 

  3229.                   &quot;value&quot; : 2235,
    3230. 

  3230.                   &quot;name&quot; : &quot;REDUCE_SHUFFLE_BYTES&quot;
    3231. 

  3231.                },
    3232. 

  3232.                {
    3233. 

  3233.                   &quot;value&quot; : 460,
    3234. 

  3234.                   &quot;name&quot; : &quot;REDUCE_INPUT_RECORDS&quot;
    3235. 

  3235.                },
    3236. 

  3236.                {
    3237. 

  3237.                   &quot;value&quot; : 0,
    3238. 

  3238.                   &quot;name&quot; : &quot;REDUCE_OUTPUT_RECORDS&quot;
    3239. 

  3239.                },
    3240. 

  3240.                {
    3241. 

  3241.                   &quot;value&quot; : 0,
    3242. 

  3242.                   &quot;name&quot; : &quot;SPILLED_RECORDS&quot;
    3243. 

  3243.                },
    3244. 

  3244.                {
    3245. 

  3245.                   &quot;value&quot; : 1,
    3246. 

  3246.                   &quot;name&quot; : &quot;SHUFFLED_MAPS&quot;
    3247. 

  3247.                },
    3248. 

  3248.                {
    3249. 

  3249.                   &quot;value&quot; : 0,
    3250. 

  3250.                   &quot;name&quot; : &quot;FAILED_SHUFFLE&quot;
    3251. 

  3251.                },
    3252. 

  3252.                {
    3253. 

  3253.                   &quot;value&quot; : 1,
    3254. 

  3254.                   &quot;name&quot; : &quot;MERGED_MAP_OUTPUTS&quot;
    3255. 

  3255.                },
    3256. 

  3256.                {
    3257. 

  3257.                   &quot;value&quot; : 26,
    3258. 

  3258.                   &quot;name&quot; : &quot;GC_TIME_MILLIS&quot;
    3259. 

  3259.                },
    3260. 

  3260.                {
    3261. 

  3261.                   &quot;value&quot; : 860,
    3262. 

  3262.                   &quot;name&quot; : &quot;CPU_MILLISECONDS&quot;
    3263. 

  3263.                },
    3264. 

  3264.                {
    3265. 

  3265.                   &quot;value&quot; : 107839488,
    3266. 

  3266.                   &quot;name&quot; : &quot;PHYSICAL_MEMORY_BYTES&quot;
    3267. 

  3267.                },
    3268. 

  3268.                {
    3269. 

  3269.                   &quot;value&quot; : 1123147776,
    3270. 

  3270.                   &quot;name&quot; : &quot;VIRTUAL_MEMORY_BYTES&quot;
    3271. 

  3271.                },
    3272. 

  3272.                {
    3273. 

  3273.                   &quot;value&quot; : 57475072,
    3274. 

  3274.                   &quot;name&quot; : &quot;COMMITTED_HEAP_BYTES&quot;
    3275. 

  3275.                }
    3276. 

  3276.             ]
    3277. 

  3277.          },
    3278. 

  3278.          {
    3279. 

  3279.             &quot;counterGroupName&quot; : &quot;Shuffle Errors&quot;,
    3280. 

  3280.             &quot;counter&quot; : [
    3281. 

  3281.                {
    3282. 

  3282.                   &quot;value&quot; : 0,
    3283. 

  3283.                   &quot;name&quot; : &quot;BAD_ID&quot;
    3284. 

  3284.                },
    3285. 

  3285.                {
    3286. 

  3286.                   &quot;value&quot; : 0,
    3287. 

  3287.                   &quot;name&quot; : &quot;CONNECTION&quot;
    3288. 

  3288.                },
    3289. 

  3289.                {
    3290. 

  3290.                   &quot;value&quot; : 0,
    3291. 

  3291.                   &quot;name&quot; : &quot;IO_ERROR&quot;
    3292. 

  3292.                },
    3293. 

  3293.                {
    3294. 

  3294.                   &quot;value&quot; : 0,
    3295. 

  3295.                   &quot;name&quot; : &quot;WRONG_LENGTH&quot;
    3296. 

  3296.                },
    3297. 

  3297.                {
    3298. 

  3298.                   &quot;value&quot; : 0,
    3299. 

  3299.                   &quot;name&quot; : &quot;WRONG_MAP&quot;
    3300. 

  3300.                },
    3301. 

  3301.                {
    3302. 

  3302.                   &quot;value&quot; : 0,
    3303. 

  3303.                   &quot;name&quot; : &quot;WRONG_REDUCE&quot;
    3304. 

  3304.                }
    3305. 

  3305.             ]
    3306. 

  3306.          },
    3307. 

  3307.          {
    3308. 

  3308.             &quot;counterGroupName&quot; : &quot;org.apache.hadoop.mapreduce.lib.output.FileOutputFormatCounter&quot;,
    3309. 

  3309.             &quot;counter&quot; : [
    3310. 

  3310.                {
    3311. 

  3311.                   &quot;value&quot; : 0,
    3312. 

  3312.                   &quot;name&quot; : &quot;BYTES_WRITTEN&quot;
    3313. 

  3313.                }
    3314. 

  3314.             ]
    3315. 

  3315.          }
    3316. 

  3316.       ],
    3317. 

  3317.       &quot;id&quot; : &quot;attempt_1326381300833_2_2_m_0_0&quot;
    3318. 

  3318.    }
    3319. 

  3319. }
    3320. 

  3320. </pre></div></div>
    3321. 

  3321. 

  3322. <p><b>XML response</b></p>
    3323. 

  3323. <p>HTTP Request:</p>
    3324. 

  3324. 

  3325. <div class="source">
    3326. 

  3326. <div class="source">
    3327. 

  3327. <pre>  GET http://history-server-http-address:port/ws/v1/history/mapreduce/jobs/job_1326381300833_2_2/tasks/task_1326381300833_2_2_m_0/attempts/attempt_1326381300833_2_2_m_0_0/counters
    3328. 

  3328.   Accept: application/xml
    3329. 

  3329. </pre></div></div>
    3330. 

  3330. 

  3331. <p>Response Header:</p>
    3332. 

  3332. 

  3333. <div class="source">
    3334. 

  3334. <div class="source">
    3335. 

  3335. <pre>  HTTP/1.1 200 OK
    3336. 

  3336.   Content-Type: application/xml
    3337. 

  3337.   Content-Length: 2735
    3338. 

  3338.   Server: Jetty(6.1.26)
    3339. 

  3339. </pre></div></div>
    3340. 

  3340. 

  3341. <p>Response Body:</p>
    3342. 

  3342. 

  3343. <div class="source">
    3344. 

  3344. <div class="source">
    3345. 

  3345. <pre>&lt;?xml version=&quot;1.0&quot; encoding=&quot;UTF-8&quot; standalone=&quot;yes&quot;?&gt;
    3346. 

  3346. &lt;jobTaskAttemptCounters&gt;
    3347. 

  3347.   &lt;id&gt;attempt_1326381300833_2_2_m_0_0&lt;/id&gt;
    3348. 

  3348.   &lt;taskAttemptCounterGroup&gt;
    3349. 

  3349.     &lt;counterGroupName&gt;org.apache.hadoop.mapreduce.FileSystemCounter&lt;/counterGroupName&gt;
    3350. 

  3350.     &lt;counter&gt;
    3351. 

  3351.       &lt;name&gt;FILE_BYTES_READ&lt;/name&gt;
    3352. 

  3352.       &lt;value&gt;2363&lt;/value&gt;
    3353. 

  3353.     &lt;/counter&gt;
    3354. 

  3354.     &lt;counter&gt;
    3355. 

  3355.       &lt;name&gt;FILE_BYTES_WRITTEN&lt;/name&gt;
    3356. 

  3356.       &lt;value&gt;54372&lt;/value&gt;
    3357. 

  3357.     &lt;/counter&gt;
    3358. 

  3358.     &lt;counter&gt;
    3359. 

  3359.       &lt;name&gt;FILE_READ_OPS&lt;/name&gt;
    3360. 

  3360.       &lt;value&gt;0&lt;/value&gt;
    3361. 

  3361.     &lt;/counter&gt;
    3362. 

  3362.     &lt;counter&gt;
    3363. 

  3363.       &lt;name&gt;FILE_LARGE_READ_OPS&lt;/name&gt;
    3364. 

  3364.       &lt;value&gt;0&lt;/value&gt;
    3365. 

  3365.     &lt;/counter&gt;
    3366. 

  3366.     &lt;counter&gt;
    3367. 

  3367.       &lt;name&gt;FILE_WRITE_OPS&lt;/name&gt;
    3368. 

  3368.       &lt;value&gt;0&lt;/value&gt;
    3369. 

  3369.     &lt;/counter&gt;
    3370. 

  3370.     &lt;counter&gt;
    3371. 

  3371.       &lt;name&gt;HDFS_BYTES_READ&lt;/name&gt;
    3372. 

  3372.       &lt;value&gt;0&lt;/value&gt;
    3373. 

  3373.     &lt;/counter&gt;
    3374. 

  3374.     &lt;counter&gt;
    3375. 

  3375.       &lt;name&gt;HDFS_BYTES_WRITTEN&lt;/name&gt;
    3376. 

  3376.       &lt;value&gt;0&lt;/value&gt;
    3377. 

  3377.     &lt;/counter&gt;
    3378. 

  3378.     &lt;counter&gt;
    3379. 

  3379.       &lt;name&gt;HDFS_READ_OPS&lt;/name&gt;
    3380. 

  3380.       &lt;value&gt;0&lt;/value&gt;
    3381. 

  3381.     &lt;/counter&gt;
    3382. 

  3382.     &lt;counter&gt;
    3383. 

  3383.       &lt;name&gt;HDFS_LARGE_READ_OPS&lt;/name&gt;
    3384. 

  3384.       &lt;value&gt;0&lt;/value&gt;
    3385. 

  3385.     &lt;/counter&gt;
    3386. 

  3386.     &lt;counter&gt;
    3387. 

  3387.       &lt;name&gt;HDFS_WRITE_OPS&lt;/name&gt;
    3388. 

  3388.       &lt;value&gt;0&lt;/value&gt;
    3389. 

  3389.     &lt;/counter&gt;
    3390. 

  3390.   &lt;/taskAttemptCounterGroup&gt;
    3391. 

  3391.   &lt;taskAttemptCounterGroup&gt;
    3392. 

  3392.     &lt;counterGroupName&gt;org.apache.hadoop.mapreduce.TaskCounter&lt;/counterGroupName&gt;
    3393. 

  3393.     &lt;counter&gt;
    3394. 

  3394.       &lt;name&gt;COMBINE_INPUT_RECORDS&lt;/name&gt;
    3395. 

  3395.       &lt;value&gt;0&lt;/value&gt;
    3396. 

  3396.     &lt;/counter&gt;
    3397. 

  3397.     &lt;counter&gt;
    3398. 

  3398.       &lt;name&gt;COMBINE_OUTPUT_RECORDS&lt;/name&gt;
    3399. 

  3399.       &lt;value&gt;0&lt;/value&gt;
    3400. 

  3400.     &lt;/counter&gt;
    3401. 

  3401.     &lt;counter&gt;
    3402. 

  3402.       &lt;name&gt;REDUCE_INPUT_GROUPS&lt;/name&gt;
    3403. 

  3403.       &lt;value&gt;460&lt;/value&gt;
    3404. 

  3404.     &lt;/counter&gt;
    3405. 

  3405.     &lt;counter&gt;
    3406. 

  3406.       &lt;name&gt;REDUCE_SHUFFLE_BYTES&lt;/name&gt;
    3407. 

  3407.       &lt;value&gt;2235&lt;/value&gt;
    3408. 

  3408.     &lt;/counter&gt;
    3409. 

  3409.     &lt;counter&gt;
    3410. 

  3410.       &lt;name&gt;REDUCE_INPUT_RECORDS&lt;/name&gt;
    3411. 

  3411.       &lt;value&gt;460&lt;/value&gt;
    3412. 

  3412.     &lt;/counter&gt;
    3413. 

  3413.     &lt;counter&gt;
    3414. 

  3414.       &lt;name&gt;REDUCE_OUTPUT_RECORDS&lt;/name&gt;
    3415. 

  3415.       &lt;value&gt;0&lt;/value&gt;
    3416. 

  3416.     &lt;/counter&gt;
    3417. 

  3417.     &lt;counter&gt;
    3418. 

  3418.       &lt;name&gt;SPILLED_RECORDS&lt;/name&gt;
    3419. 

  3419.       &lt;value&gt;0&lt;/value&gt;
    3420. 

  3420.     &lt;/counter&gt;
    3421. 

  3421.     &lt;counter&gt;
    3422. 

  3422.       &lt;name&gt;SHUFFLED_MAPS&lt;/name&gt;
    3423. 

  3423.       &lt;value&gt;1&lt;/value&gt;
    3424. 

  3424.     &lt;/counter&gt;
    3425. 

  3425.     &lt;counter&gt;
    3426. 

  3426.       &lt;name&gt;FAILED_SHUFFLE&lt;/name&gt;
    3427. 

  3427.       &lt;value&gt;0&lt;/value&gt;
    3428. 

  3428.     &lt;/counter&gt;
    3429. 

  3429.     &lt;counter&gt;
    3430. 

  3430.       &lt;name&gt;MERGED_MAP_OUTPUTS&lt;/name&gt;
    3431. 

  3431.       &lt;value&gt;1&lt;/value&gt;
    3432. 

  3432.     &lt;/counter&gt;
    3433. 

  3433.     &lt;counter&gt;
    3434. 

  3434.       &lt;name&gt;GC_TIME_MILLIS&lt;/name&gt;
    3435. 

  3435.       &lt;value&gt;26&lt;/value&gt;
    3436. 

  3436.     &lt;/counter&gt;
    3437. 

  3437.     &lt;counter&gt;
    3438. 

  3438.       &lt;name&gt;CPU_MILLISECONDS&lt;/name&gt;
    3439. 

  3439.       &lt;value&gt;860&lt;/value&gt;
    3440. 

  3440.     &lt;/counter&gt;
    3441. 

  3441.     &lt;counter&gt;
    3442. 

  3442.       &lt;name&gt;PHYSICAL_MEMORY_BYTES&lt;/name&gt;
    3443. 

  3443.       &lt;value&gt;107839488&lt;/value&gt;
    3444. 

  3444.     &lt;/counter&gt;
    3445. 

  3445.     &lt;counter&gt;
    3446. 

  3446.       &lt;name&gt;VIRTUAL_MEMORY_BYTES&lt;/name&gt;
    3447. 

  3447.       &lt;value&gt;1123147776&lt;/value&gt;
    3448. 

  3448.     &lt;/counter&gt;
    3449. 

  3449.     &lt;counter&gt;
    3450. 

  3450.       &lt;name&gt;COMMITTED_HEAP_BYTES&lt;/name&gt;
    3451. 

  3451.       &lt;value&gt;57475072&lt;/value&gt;
    3452. 

  3452.     &lt;/counter&gt;
    3453. 

  3453.   &lt;/taskAttemptCounterGroup&gt;
    3454. 

  3454.   &lt;taskAttemptCounterGroup&gt;
    3455. 

  3455.     &lt;counterGroupName&gt;Shuffle Errors&lt;/counterGroupName&gt;
    3456. 

  3456.     &lt;counter&gt;
    3457. 

  3457.       &lt;name&gt;BAD_ID&lt;/name&gt;
    3458. 

  3458.       &lt;value&gt;0&lt;/value&gt;
    3459. 

  3459.     &lt;/counter&gt;
    3460. 

  3460.     &lt;counter&gt;
    3461. 

  3461.       &lt;name&gt;CONNECTION&lt;/name&gt;
    3462. 

  3462.       &lt;value&gt;0&lt;/value&gt;
    3463. 

  3463.     &lt;/counter&gt;
    3464. 

  3464.     &lt;counter&gt;
    3465. 

  3465.       &lt;name&gt;IO_ERROR&lt;/name&gt;
    3466. 

  3466.       &lt;value&gt;0&lt;/value&gt;
    3467. 

  3467.     &lt;/counter&gt;
    3468. 

  3468.     &lt;counter&gt;
    3469. 

  3469.       &lt;name&gt;WRONG_LENGTH&lt;/name&gt;
    3470. 

  3470.       &lt;value&gt;0&lt;/value&gt;
    3471. 

  3471.     &lt;/counter&gt;
    3472. 

  3472.     &lt;counter&gt;
    3473. 

  3473.       &lt;name&gt;WRONG_MAP&lt;/name&gt;
    3474. 

  3474.       &lt;value&gt;0&lt;/value&gt;
    3475. 

  3475.     &lt;/counter&gt;
    3476. 

  3476.     &lt;counter&gt;
    3477. 

  3477.       &lt;name&gt;WRONG_REDUCE&lt;/name&gt;
    3478. 

  3478.       &lt;value&gt;0&lt;/value&gt;
    3479. 

  3479.     &lt;/counter&gt;
    3480. 

  3480.   &lt;/taskAttemptCounterGroup&gt;
    3481. 

  3481.   &lt;taskAttemptCounterGroup&gt;
    3482. 

  3482.     &lt;counterGroupName&gt;org.apache.hadoop.mapreduce.lib.output.FileOutputFormatCounter&lt;/counterGroupName&gt;
    3483. 

  3483.     &lt;counter&gt;
    3484. 

  3484.       &lt;name&gt;BYTES_WRITTEN&lt;/name&gt;
    3485. 

  3485.       &lt;value&gt;0&lt;/value&gt;
    3486. 

  3486.     &lt;/counter&gt;
    3487. 

  3487.   &lt;/taskAttemptCounterGroup&gt;
    3488. 

  3488. &lt;/jobTaskAttemptCounters&gt;
    3489. 

  3489. </pre></div></div></section></section></section>
    3490. 

  3490.       </div>
    3491. 

  3491.     </div>
    3492. 

  3492.     <div class="clear">
    3493. 

  3493.       <hr/>
    3494. 

  3494.     </div>
    3495. 

  3495.     <div id="footer">
    3496. 

  3496.       <div class="xright">
    3497. 

  3497.         &#169;            2008-2025
    3498. 

  3498.               Apache Software Foundation
    3499. 

  3499.             
    3500. 

  3500.                           - <a href="http://maven.apache.org/privacy-policy.html">Privacy Policy</a>.
    3501. 

  3501.         Apache Maven, Maven, Apache, the Apache feather logo, and the Apache Maven project logos are trademarks of The Apache Software Foundation.
    3502. 

  3502.       </div>
    3503. 

  3503.       <div class="clear">
    3504. 

  3504.         <hr/>
    3505. 

  3505.       </div>
    3506. 

  3506.     </div>
    3507. 

  3507.   </body>
    3508. 

  3508. </html>
    3509.