HDFS-9182. Cleanup the findbugs and other issues after HDFS EC merged to trunk. Contributed by Uma Maheswara Rao G.

hadoop-common-project/hadoop-common/CHANGES-HDFS-EC-7285.txt

@@ -1,74 +0,0 @@
-  BREAKDOWN OF HADOOP-11264 SUBTASKS AND RELATED JIRAS (Common part of HDFS-7285)
-
-    HADOOP-11514. Raw Erasure Coder API for concrete encoding and decoding
-    (Kai Zheng via umamahesh)
-
-    HADOOP-11534. Minor improvements for raw erasure coders
-    ( Kai Zheng via vinayakumarb )
-
-    HADOOP-11541. Raw XOR coder
-    ( Kai Zheng )
-
-    HADOOP-11542. Raw Reed-Solomon coder in pure Java. Contributed by Kai Zheng
-    ( Kai Zheng )
-
-    HADOOP-11643. Define EC schema API for ErasureCodec. Contributed by Kai Zheng
-    ( Kai Zheng )
-
-    HADOOP-11646. Erasure Coder API for encoding and decoding of block group
-    ( Kai Zheng via vinayakumarb )
-
-    HADOOP-11705. Make erasure coder configurable. Contributed by Kai Zheng
-    ( Kai Zheng )
-
-    HADOOP-11706. Refine a little bit erasure coder API. Contributed by Kai Zheng
-    ( Kai Zheng )
-
-    HADOOP-11707. Add factory to create raw erasure coder. Contributed by Kai Zheng
-    ( Kai Zheng )
-
-    HADOOP-11647. Reed-Solomon ErasureCoder. Contributed by Kai Zheng
-    ( Kai Zheng )
-
-    HADOOP-11782 Correct two thrown messages in ECSchema class. Contributed by Xinwei Qin
-    ( Xinwei Qin via Kai Zheng )
-
-    HADOOP-11740. Combine erasure encoder and decoder interfaces (Zhe Zhang)
-
-    HADOOP-11805 Better to rename some raw erasure coders. Contributed by Kai Zheng
-    ( Kai Zheng )
-
-    HADOOP-11645. Erasure Codec API covering the essential aspects for an erasure code
-    ( Kai Zheng via vinayakumarb )
-  
-    HADOOP-11818. Minor improvements for erasurecode classes. (Rakesh R via Kai Zheng)
-
-    HADOOP-11841. Remove unused ecschema-def.xml files.  (szetszwo)
-
-    HADOOP-11921. Enhance tests for erasure coders. (Kai Zheng via Zhe Zhang)
-
-    HADOOP-11920. Refactor some codes for erasure coders. (Kai Zheng via Zhe Zhang)
-
-    HADOOP-11566. Add tests and fix for erasure coders to recover erased parity 
-    units. (Kai Zheng via Zhe Zhang)
-
-    HADOOP-11938. Enhance ByteBuffer version encode/decode API of raw erasure 
-    coder. (Kai Zheng via Zhe Zhang)
-
-    HADOOP-12013. Generate fixed data to perform erasure coder test. (Kai Zheng)
-
-    HADOOP-12029. Remove chunkSize from ECSchema as its not required for coders
-    (vinayakumarb)
-
-    HADOOP-11847. Enhance raw coder allowing to read least required inputs in decoding.
-    (Kai Zheng)
-
-    HADOOP-12011. Allow to dump verbose information to ease debugging in raw erasure coders
-    (Kai Zheng)
-
-    HADOOP-12065. Using more meaningful keys in EC schema. (Kai Zheng)
-
-    HDFS-8557. Allow to configure RS and XOR raw coders (Kai Zheng)
-
-    HADOOP-12060. Fix ByteBuffer usage for raw erasure coders. (Kai Zheng via
-    jing9)

hadoop-common-project/hadoop-common/CHANGES.txt

@@ -513,6 +513,81 @@ Trunk (Unreleased)
 
     HADOOP-8589. ViewFs tests fail when tests and home dirs are nested (sanjay Radia)
 
+    BREAKDOWN OF HADOOP-11264 SUBTASKS AND RELATED JIRAS (Common part of HDFS-7285)
+
+      HADOOP-11514. Raw Erasure Coder API for concrete encoding and decoding
+      (Kai Zheng via umamahesh)
+
+      HADOOP-11534. Minor improvements for raw erasure coders
+      ( Kai Zheng via vinayakumarb )
+
+      HADOOP-11541. Raw XOR coder
+      ( Kai Zheng )
+
+      HADOOP-11542. Raw Reed-Solomon coder in pure Java. Contributed by Kai Zheng
+      ( Kai Zheng )
+
+      HADOOP-11643. Define EC schema API for ErasureCodec. Contributed by Kai Zheng
+      ( Kai Zheng )
+
+      HADOOP-11646. Erasure Coder API for encoding and decoding of block group
+      ( Kai Zheng via vinayakumarb )
+
+      HADOOP-11705. Make erasure coder configurable. Contributed by Kai Zheng
+      ( Kai Zheng )
+
+      HADOOP-11706. Refine a little bit erasure coder API. Contributed by Kai Zheng
+      ( Kai Zheng )
+
+      HADOOP-11707. Add factory to create raw erasure coder. Contributed by Kai Zheng
+      ( Kai Zheng )
+
+      HADOOP-11647. Reed-Solomon ErasureCoder. Contributed by Kai Zheng
+      ( Kai Zheng )
+
+      HADOOP-11782 Correct two thrown messages in ECSchema class. Contributed by Xinwei Qin
+      ( Xinwei Qin via Kai Zheng )
+
+      HADOOP-11740. Combine erasure encoder and decoder interfaces (Zhe Zhang)
+
+      HADOOP-11805 Better to rename some raw erasure coders. Contributed by Kai Zheng
+      ( Kai Zheng )
+
+      HADOOP-11645. Erasure Codec API covering the essential aspects for an erasure code
+      ( Kai Zheng via vinayakumarb )
+
+      HADOOP-11818. Minor improvements for erasurecode classes. (Rakesh R via Kai Zheng)
+
+      HADOOP-11841. Remove unused ecschema-def.xml files.  (szetszwo)
+
+      HADOOP-11921. Enhance tests for erasure coders. (Kai Zheng via Zhe Zhang)
+
+      HADOOP-11920. Refactor some codes for erasure coders. (Kai Zheng via Zhe Zhang)
+
+      HADOOP-11566. Add tests and fix for erasure coders to recover erased parity
+      units. (Kai Zheng via Zhe Zhang)
+
+      HADOOP-11938. Enhance ByteBuffer version encode/decode API of raw erasure
+      coder. (Kai Zheng via Zhe Zhang)
+
+      HADOOP-12013. Generate fixed data to perform erasure coder test. (Kai Zheng)
+
+      HADOOP-12029. Remove chunkSize from ECSchema as its not required for coders
+      (vinayakumarb)
+
+      HADOOP-11847. Enhance raw coder allowing to read least required inputs in decoding.
+      (Kai Zheng)
+
+      HADOOP-12011. Allow to dump verbose information to ease debugging in raw erasure coders
+      (Kai Zheng)
+
+      HADOOP-12065. Using more meaningful keys in EC schema. (Kai Zheng)
+
+      HADOOP-12060. Fix ByteBuffer usage for raw erasure coders. (Kai Zheng via
+      jing9)
+
+      HADOOP-11921. Enhance tests for erasure coders. (Kai Zheng)
+
 Release 2.8.0 - UNRELEASED
 
   INCOMPATIBLE CHANGES

hadoop-hdfs-project/hadoop-hdfs-client/dev-support/findbugsExcludeFile.xml

@@ -15,6 +15,9 @@
       <Class name="org.apache.hadoop.hdfs.protocol.SnapshottableDirectoryStatus"/>
       <Class name="org.apache.hadoop.hdfs.server.protocol.DatanodeStorageReport"/>
       <Class name="org.apache.hadoop.hdfs.protocol.datatransfer.sasl.SaslResponseWithNegotiatedCipherOption"/>
+      <Class name="org.apache.hadoop.hdfs.DFSPacket”/>
+      <Class name="org.apache.hadoop.hdfs.protocol.LocatedStripedBlock”/>
+      <Class name=“org.apache.hadoop.hdfs.util.StripedBlockUtil$ChunkByteArray”/>
     </Or>
     <Bug pattern="EI_EXPOSE_REP,EI_EXPOSE_REP2" />
   </Match>

hadoop-hdfs-project/hadoop-hdfs-client/src/main/java/org/apache/hadoop/hdfs/DFSOutputStream.java

@@ -424,7 +424,7 @@ public class DFSOutputStream extends FSOutputSummer
     currentPacket = null;
   }
 
-  void enqueueCurrentPacketFull() throws IOException {
+  synchronized void enqueueCurrentPacketFull() throws IOException {
     LOG.debug("enqueue full {}, src={}, bytesCurBlock={}, blockSize={},"
             + " appendChunk={}, {}", currentPacket, src, getStreamer()
             .getBytesCurBlock(), blockSize, getStreamer().getAppendChunk(),

hadoop-hdfs-project/hadoop-hdfs-client/src/main/java/org/apache/hadoop/hdfs/DFSStripedOutputStream.java

@@ -531,7 +531,7 @@ public class DFSStripedOutputStream extends DFSOutputStream {
   }
 
   @Override
-  void enqueueCurrentPacketFull() throws IOException {
+  synchronized void enqueueCurrentPacketFull() throws IOException {
     LOG.debug("enqueue full {}, src={}, bytesCurBlock={}, blockSize={},"
             + " appendChunk={}, {}", currentPacket, src, getStreamer()
             .getBytesCurBlock(), blockSize, getStreamer().getAppendChunk(),

hadoop-hdfs-project/hadoop-hdfs/CHANGES-HDFS-EC-7285.txt

@@ -1,460 +0,0 @@
-  BREAKDOWN OF HDFS-7285 SUBTASKS AND RELATED JIRAS
-
-    HDFS-7347. Configurable erasure coding policy for individual files and
-    directories ( Zhe Zhang via vinayakumarb )
-
-    HDFS-7339. Representing striped block groups in NameNode with hierarchical
-    naming protocol ( Zhe Zhang )
-
-    HDFS-7652. Process block reports for erasure coded blocks (Zhe Zhang)
-
-    HDFS-7716. Erasure Coding: extend BlockInfo to handle EC info (Jing Zhao)
-
-    HDFS-7749. Erasure Coding: Add striped block support in INodeFile (Jing Zhao)
-
-    HDFS-7837. Erasure Coding: allocate and persist striped blocks in NameNode
-    (Jing Zhao via Zhe Zhang)
-
-    HDFS-7872. Erasure Coding: INodeFile.dumpTreeRecursively() supports to print
-    striped blocks (Takuya Fukudome via jing9)
-
-    HDFS-7853. Erasure coding: extend LocatedBlocks to support reading from
-    striped files (Jing Zhao)
-
-    HDFS-7826. Erasure Coding: Update INodeFile quota computation for striped
-    blocks ( Kai Sasaki via jing9 )
-
-    HDFS-7912. Erasure Coding: track BlockInfo instead of Block in
-    UnderReplicatedBlocks and PendingReplicationBlocks (Jing Zhao)
-
-    HDFS-7369. Erasure coding: distribute recovery work for striped blocks to
-    DataNode (Zhe Zhang)
-
-    HDFS-7864. Erasure Coding: Update safemode calculation for striped blocks
-    (GAO Rui via jing9)
-
-    HDFS-7827. Erasure Coding: support striped blocks in non-protobuf fsimage
-    ( Hui Zheng via jing9 )
-
-    HDFS-7616. Add a test for BlockGroup support in FSImage.
-    (Takuya Fukudome via szetszwo)
-
-    HDFS-7907. Erasure Coding: track invalid, corrupt, and under-recovery striped
-    blocks in NameNode (Jing Zhao)
-
-    HDFS-8005. Erasure Coding: simplify striped block recovery work computation
-    and add tests (Jing Zhao)
-
-    HDFS-7617. Add unit tests for editlog transactions for EC 
-    (Hui Zheng via Zhe Zhang)
-
-    HDFS-7839. Erasure coding: implement facilities in NameNode to create and
-    manage EC zones (Zhe Zhang)
-
-    HDFS-7969. Erasure coding: NameNode support for lease recovery of striped
-    block groups. (Zhe Zhang)
-
-    HDFS-7782. Erasure coding: pread from files in striped layout.
-    (Zhe Zhang and Jing Zhao via Zhe Zhang)
-
-    HDFS-8023. Erasure Coding: retrieve eraure coding schema for a file from
-    NameNode (vinayakumarb)
-
-    HDFS-8074. Define a system-wide default EC schema. (Kai Zheng)
-
-    HDFS-8077. Erasure coding: fix bugs in EC zone and symlinks.
-    (Jing Zhao and Zhe Zhang via Jing Zhao)
-
-    HDFS-8104. Make hard-coded values consistent with the system default schema first before remove them. (Kai Zheng)
-
-    HDFS-7889. Subclass DFSOutputStream to support writing striping layout files. (Li Bo via Kai Zheng)
-
-    HDFS-8090. Erasure Coding: Add RPC to client-namenode to list all
-    ECSchemas loaded in Namenode. (vinayakumarb)
-
-    HDFS-8122. Erasure Coding: Support specifying ECSchema during creation of ECZone.
-    (Vinayakumar B via Zhe Zhang)
-
-    HDFS-8114. Erasure coding: Add auditlog FSNamesystem#createErasureCodingZone if this
-    operation fails. (Rakesh R via Zhe Zhang)
-
-    HDFS-8123. Erasure Coding: Better to move EC related proto messages to a
-    separate erasurecoding proto file (Rakesh R via vinayakumarb)
-
-    HDFS-7349. Support DFS command for the EC encoding (vinayakumarb)
-
-    HDFS-8120. Erasure coding: created util class to analyze striped block groups.
-    (Contributed by Zhe Zhang and Li Bo via Jing Zhao)
-
-    HDFS-7994. Detect if resevered EC Block ID is already used during namenode
-    startup. (Hui Zheng via szetszwo)
-
-    HDFS-8167. BlockManager.addBlockCollectionWithCheck should check if the block is a striped block. (Hui Zheng via zhz).
-
-    HDFS-8166. DFSStripedOutputStream should not create empty blocks. (Jing Zhao)
-
-    HDFS-7937. Erasure Coding: INodeFile quota computation unit tests.
-    (Kai Sasaki via Jing Zhao)
-
-    HDFS-8145. Fix the editlog corruption exposed by failed TestAddStripedBlocks.
-    (Jing Zhao)
-
-    HDFS-8146. Protobuf changes for BlockECRecoveryCommand and its fields for
-    making it ready for transfer to DN (Uma Maheswara Rao G via vinayakumarb)
-
-    HDFS-8181. createErasureCodingZone sets retryCache state as false always
-    (Uma Maheswara Rao G via vinayakumarb)
-
-    HDFS-8190. StripedBlockUtil.getInternalBlockLength may have overflow error.
-    (szetszwo)
-
-    HDFS-8216. TestDFSStripedOutputStream should use BlockReaderTestUtil to 
-    create BlockReader. (szetszwo via Zhe Zhang)
-
-    HDFS-8212. DistributedFileSystem.createErasureCodingZone should pass schema
-    in FileSystemLinkResolver. (szetszwo via Zhe Zhang)
-
-    HDFS-8024. Erasure Coding: ECworker frame, basics, bootstraping and configuration.
-    (umamahesh)
-
-    HDFS-8156. Add/implement necessary APIs even we just have the system default 
-    schema. (Kai Zheng via Zhe Zhang)
-
-    HDFS-8136. Client gets and uses EC schema when reads and writes a stripping
-    file. (Kai Sasaki via Kai Zheng)
-
-    HDFS-8233. Fix DFSStripedOutputStream#getCurrentBlockGroupBytes when the last
-    stripe is at the block group boundary. (jing9)
-
-    HDFS-8223. Should calculate checksum for parity blocks in DFSStripedOutputStream.
-    (Yi Liu via jing9)
-
-    HDFS-8228. Erasure Coding: SequentialBlockGroupIdGenerator#nextValue may cause 
-    block id conflicts (Jing Zhao via Zhe Zhang)
-
-    HDFS-8033. Erasure coding: stateful (non-positional) read from files in 
-    striped layout (Zhe Zhang)
-
-    HDFS-8230. Erasure Coding: Ignore DatanodeProtocol#DNA_ERASURE_CODING_RECOVERY 
-    commands from standbynode if any (vinayakumarb)
-
-    HDFS-8189. ClientProtocol#createErasureCodingZone API was wrongly annotated
-    as Idempotent (vinayakumarb)
-
-    HDFS-8235. Erasure Coding: Create DFSStripedInputStream in DFSClient#open.
-    (Kai Sasaki via jing9)
-
-    HDFS-8272. Erasure Coding: simplify the retry logic in DFSStripedInputStream 
-    (stateful read). (Jing Zhao via Zhe Zhang)
-
-    HDFS-8282. Erasure coding: move striped reading logic to StripedBlockUtil.
-    (Zhe Zhang)
-
-    HDFS-8183. Erasure Coding: Improve DFSStripedOutputStream closing of 
-    datastreamer threads. (Rakesh R via Zhe Zhang)
-
-    HDFS-8308. Erasure Coding: NameNode may get blocked in waitForLoadingFSImage()
-    when loading editlog. (jing9)
-
-    HDFS-7949. WebImageViewer need support file size calculation with striped 
-    blocks. (Rakesh R via Zhe Zhang)
-
-    HDFS-8316. Erasure coding: refactor EC constants to be consistent with HDFS-8249.
-    (Zhe Zhang via jing9)
-
-    HDFS-8281. Erasure Coding: implement parallel stateful reading for striped layout.
-    (jing9)
-
-    HDFS-8137. Send the EC schema to DataNode via EC encoding/recovering command(umamahesh)
-
-    HDFS-8242. Erasure Coding: XML based end-to-end test for ECCli commands
-    (Rakesh R via vinayakumarb)
-
-    HDFS-8324. Add trace info to DFSClient#getErasureCodingZoneInfo(..) (vinayakumarb via 
-    umamahesh)
-
-    HDFS-7672. Handle write failure for stripping blocks and refactor the
-    existing code in DFSStripedOutputStream and StripedDataStreamer.  (szetszwo)
-
-    HDFS-7348. Erasure Coding: DataNode reconstruct striped blocks. 
-    (Yi Liu via Zhe Zhang)
-
-    HADOOP-11921. Enhance tests for erasure coders. (Kai Zheng)
-
-    HDFS-8334. Erasure coding: rename DFSStripedInputStream related test 
-    classes. (Zhe Zhang)
-
-    HDFS-8129. Erasure Coding: Maintain consistent naming for Erasure Coding related classes - EC/ErasureCoding
-    (umamahesh)
-
-    HDFS-8203. Erasure Coding: Seek and other Ops in DFSStripedInputStream.
-    (Yi Liu via jing9)
-
-    HDFS-8289. Erasure Coding: add ECSchema to HdfsFileStatus. (Yong Zhang via
-    jing9)
-
-    HDFS-8355. Erasure Coding: Refactor BlockInfo and BlockInfoUnderConstruction.
-    (Tsz Wo Nicholas Sze via jing9)
-
-    HDFS-7678. Erasure coding: DFSInputStream with decode functionality (pread).
-    (Zhe Zhang)
-
-    HDFS-8372. Erasure coding: compute storage type quotas for striped files,
-    to be consistent with HDFS-8327. (Zhe Zhang via jing9)
-
-    HDFS-8368. Erasure Coding: DFS opening a non-existent file need to be 
-    handled properly (Rakesh R via zhz)
-
-    HDFS-8363. Erasure Coding: DFSStripedInputStream#seekToNewSource. (yliu)
-
-    HDFS-8195. Erasure coding: Fix file quota change when we complete/commit 
-    the striped blocks. (Takuya Fukudome via zhz)
-
-    HDFS-8364. Erasure coding: fix some minor bugs in EC CLI
-    (Walter Su via vinayakumarb)
-
-    HDFS-8391. NN should consider current EC tasks handling count from DN while 
-    assigning new tasks. (umamahesh)
-
-    HDFS-8367. BlockInfoStriped uses EC schema. (Kai Sasaki via Kai Zheng)
-
-    HDFS-8352. Erasure Coding: test webhdfs read write stripe file. (waltersu4549)
-
-    HDFS-8417. Erasure Coding: Pread failed to read data starting from not-first stripe.
-    (Walter Su via jing9)
-
-    HDFS-8418. Fix the isNeededReplication calculation for Striped block in NN.
-    (Yi Liu via jing9)
-
-    HDFS-8320. Erasure coding: consolidate striping-related terminologies. (zhz)
-
-    HDFS-8366. Erasure Coding: Make the timeout parameter of polling blocking queue 
-    configurable in DFSStripedOutputStream. (Li Bo)
-
-    HDFS-8378. Erasure Coding: Few improvements for the erasure coding worker.
-    (Rakesh R via waltersu4549)
-
-    HDFS-8375. Add cellSize as an XAttr to ECZone. ( Vinayakumar B via zhz).
-
-    HDFS-8428. Erasure Coding: Fix the NullPointerException when deleting file.
-    (Yi Liu via zhz).
-
-    HDFS-8323. Bump GenerationStamp for write faliure in DFSStripedOutputStream.
-    (Tsz Wo Nicholas Sze via jing9)
-
-    HDFS-8427. Remove dataBlockNum and parityBlockNum from BlockInfoStriped.
-    (Kai Sasaki via jing9)
-
-    HDFS-8186. Erasure coding: Make block placement policy for EC file configurable.
-    (Walter Su via zhz)
-
-    HDFS-8294. Erasure Coding: Fix Findbug warnings present in erasure coding.
-    (Rakesh R via zhz)
-
-    HDFS-8441. Erasure Coding: make condition check earlier for setReplication.
-    (waltersu4549)
-
-    HDFS-7768. Change fsck to support EC files.  (Takanobu Asanuma via szetszwo)
-
-    HDFS-8382. Remove chunkSize and initialize from erasure coder. (Kai Zheng)
-
-    HDFS-8408. Revisit and refactor ErasureCodingInfo (vinayakumarb)
-
-    HDFS-8479. Erasure coding: fix striping related logic in FSDirWriteFileOp to
-    sync with HDFS-8421. (Zhe Zhang via jing9)
-
-    HDFS-8481. Erasure coding: remove workarounds in client side stripped blocks 
-    recovering. (zhz)
-
-    HDFS-8336. Expose some administrative erasure coding operations to HdfsAdmin
-    (Uma Maheswara Rao G via vinayakumarb)
-
-    HDFS-8444. Erasure Coding: fix cannot rename a zone dir
-    (Walter Su via vinayakumarb)
-
-    HDFS-8517. Fix a decoding issue in stripped block recovering in client side.
-    (Kai Zheng via jing9)
-
-    HDFS-8453. Erasure coding: properly handle start offset for internal blocks
-    in a block group. (Zhe Zhang via jing9)
-
-    HDFS-7621. Erasure Coding: update the Balancer/Mover data migration logic.
-    (Walter Su via zhz)
-
-    HDFS-8328. Follow-on to update decode for DataNode striped blocks
-    reconstruction. (yliu)
-
-    HDFS-8319. Erasure Coding: support decoding for stateful read.
-    (Jing Zhao via zhz)
-
-    HDFS-8460. Erasure Coding: stateful read result doesn't match data 
-    occasionally because of flawed test. (Walter Su via zhz)
-
-    HDFS-8556. Erasure Coding: Fix usage of 'createZone' (vinayakumarb)
-
-    HDFS-8571. Fix TestErasureCodingCli test (Vinayakumar B via waltersu4549)
-
-    HDFS-8450. Erasure Coding: Consolidate erasure coding zone related
-    implementation into a single class (Rakesh R via vinayakumarb)
-
-    HDFS-8585. Erasure Coding: Remove dataBlockNum and parityBlockNum from
-    StripedBlockProto. (Yi Liu via jing9)
-
-    HDFS-8559. Erasure Coding: fix non-protobuf fsimage for striped blocks.
-    (Jing Zhao via yliu)
-
-    HDFS-8580. Erasure coding: Persist cellSize in BlockInfoStriped and
-    StripedBlocksFeature. (Walter Su via jing9)
-
-    HDFS-8466. Refactor BlockInfoContiguous and fix NPE in
-    TestBlockInfo#testCopyConstructor() (vinayakumarb)
-
-    HDFS-8254. Avoid assigning a leading streamer in StripedDataStreamer to
-    tolerate datanode failure. (Tsz Wo Nicholas Sze via jing9)
-
-    HDFS-8543. Erasure Coding: processOverReplicatedBlock() handles striped block.
-    (Walter Su via jing9)
-
-    HDFS-8602. Erasure Coding: Client can't read(decode) the EC files which have
-    corrupt blocks. (jing9 and Kai Sasaki)
-
-    HDFS-8567. Erasure Coding: SafeMode handles file smaller than a full stripe.
-    (Walter Su via jing9)
-
-    HDFS-8253. DFSStripedOutputStream.closeThreads releases cellBuffers
-    multiple times.  (Kai Sasaki via szetszwo)
-
-    HDFS-8468. 2 RPC calls for every file read in DFSClient#open(..) resulting in
-    double Audit log entries (vinayakumarb)
-
-    HDFS-8684. Erasure Coding: fix some block number calculation for striped
-    block. (yliu)
-
-    HDFS-8461. Erasure coding: fix priority level of UnderReplicatedBlocks for
-    striped block. (Walter Su via jing9)
-
-    HDFS-8719. Erasure Coding: client generates too many small packets when
-    writing parity data. (Li Bo via waltersu4549)
-
-    HDFS-8563. Erasure Coding: fsck handles file smaller than a full stripe.
-    (Walter Su via jing9)
-
-    HDFS-8484. Erasure coding: Two contiguous blocks occupy IDs belong to same
-    striped group. (Walter Su via jing9)
-
-    HDFS-8744. Erasure Coding: the number of chunks in packet is not updated
-    when writing parity data. (Li Bo)
-
-    HDFS-8669. Erasure Coding: handle missing internal block locations in
-    DFSStripedInputStream. (jing9)
-
-    HDFS-8702. Erasure coding: update BlockManager.blockHasEnoughRacks(..) logic
-    for striped block. (Kai Sasaki via jing9)
-
-    HDFS-8734. Erasure Coding: fix one cell need two packets. (Walter Su via
-    jing9)
-
-    HDFS-8619. Erasure Coding: revisit replica counting for striped blocks.
-    (Jing Zhao via yliu)
-
-    HDFS-8058. Erasure coding: use BlockInfo[] for both striped and contiguous
-    blocks in INodeFile. (Zhe Zhang and Yi Liu via zhz)
-
-    HDFS-8787. Erasure coding: rename BlockInfoContiguousUC and BlockInfoStripedUC
-    to be consistent with trunk. (zhz)
-
-    HDFS-8433. Erasure coding: set blockToken in LocatedStripedBlock.(waltersu4549)
-
-    HDFS-8760. Erasure Coding: reuse BlockReader when reading the same block in pread.
-    (jing9)
-
-    HDFS-8781. Erasure Coding: Correctly handle BlockManager#InvalidateBlocks for
-    striped block. (Yi Liu via jing9)
-
-    HDFS-8813. Erasure Coding: Client no need to decode missing parity blocks.
-    (Walter Su via jing9)
-
-    HDFS-8798. Erasure Coding: fix DFSStripedInputStream/DFSStripedOutputStream
-    re-fetch token when expired. (Walter Su via jing9)
-
-    HDFS-8769. Erasure coding: unit test for SequentialBlockGroupIdGenerator.
-    (Rakesh R via waltersu4549)
-
-    HDFS-8202. Improve end to end stirpping file test to add erasure recovering
-    test. (Xinwei Qin via zhz)
-
-    HDFS-8804. Erasure Coding: use DirectBufferPool in DFSStripedInputStream for
-    buffer allocation. (jing9)
-
-    HDFS-8399. Erasure Coding: unit test the behaviour of BlockManager recovery
-    work for the deleted blocks. (Rakesh R via zhz)
-
-    HDFS-8857. Erasure Coding: Fix ArrayIndexOutOfBoundsException in
-    TestWriteStripedFileWithFailure. (Li Bo)
-
-    HDFS-8827. Erasure Coding: Fix NPE when NameNode processes over-replicated
-    striped blocks. (Walter Su and Takuya Fukudome via jing9)
-
-    HDFS-8854. Erasure coding: add ECPolicy to replace schema+cellSize in
-    hadoop-hdfs. (Walter Su via zhz)
-
-    HDFS-8220. Erasure Coding: StripedDataStreamer fails to handle the
-    blocklocations which doesn't satisfy BlockGroupSize. (Rakesh R via zhz)
-
-    HDFS-8838. Erasure Coding: Tolerate datanode failures in DFSStripedOutputStream
-    when the data length is small. (szetszwo via waltersu4549)
-
-    HDFS-8909. Erasure coding: update BlockInfoContiguousUC and BlockInfoStripedUC
-    to use BlockUnderConstructionFeature. (Jing Zhao via waltersu4549)
-
-    HDFS-8937. Erasure coding: do not throw exception when setting replication on
-    EC file. (Gao Rui via jing9)
-
-    HDFS-8978. Erasure coding: fix 2 failed tests of DFSStripedOutputStream.
-    (Walter Su via jing9)
-
-    HDFS-8833. Erasure coding: store EC schema and cell size in INodeFile and 
-    eliminate notion of EC zones. (zhz)
-
-    HDFS-8853. Erasure Coding: Provide ECSchema validation when setting EC
-    policy. (andreina via zhz)
-
-    HDFS-8975. Erasure coding : Fix random failure in TestSafeModeWithStripedFile
-    (J.Andreina via vinayakumarb)
-
-    HDFS-7351. Document the HDFS Erasure Coding feature.
-    (umamahesh and Zhe Zhang via wang)
-
-    HDFS-8899. Erasure Coding: use threadpool for EC recovery tasks on DataNode.
-    (Rakesh R via zhz)
-
-    HDFS-9088. Cleanup erasure coding documentation. (wang via zhz)
-
-    HDFS-9097. Erasure coding: update EC command "-s" flag to "-p" when 
-    specifying policy. (zhz)
-
-    HDFS-9086. Rename dfs.datanode.stripedread.threshold.millis to 
-    dfs.datanode.stripedread.timeout.millis. (wang via zhz)
-
-    HDFS-8550. Erasure Coding: Fix FindBugs Multithreaded correctness Warning.
-    (Rakesh R via zhz)
-
-    HDFS-9113. ErasureCodingWorker#processErasureCodingTasks should not fail to process
-    remaining tasks due to one invalid ECTask (umamahesh)
-
-    HDFS-9091. Erasure Coding: Provide DistributedFilesystem API to 
-    getAllErasureCodingPolicies. (Rakesh R via zhz)
-
-    HDFS-8920. Erasure Coding: when recovering lost blocks, logs can be too
-    verbose and hurt performance. (Rui Li via Kai Zheng)
-
-    HDFS-8882. Erasure Coding: Use datablocks, parityblocks and cell size from
-    ErasureCodingPolicy (Vinayakumar B via zhz)
-
-    HDFS-9040. Erasure coding: coordinate data streamers in
-    DFSStripedOutputStream. (jing9 and Walter Su)
-
-    HDFS-9185. Fix null tracer in ErasureCodingWorker. (Rakesh R via jing9)
-
-    HDFS-9180. Update excluded DataNodes in DFSStripedOutputStream based on failures
-    in data streamers. (jing9)

hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt

@@ -170,6 +170,9 @@ Trunk (Unreleased)
     HDFS-5033. Bad error message for fs -put/copyFromLocal if user
     doesn't have permissions to read the source (Darrell Taylor via aw)
 
+    HDFS-9182. Cleanup the findbugs and other issues after HDFS EC merged to trunk.
+    (umamahesh)
+
   OPTIMIZATIONS
 
   BUG FIXES
@@ -350,6 +353,467 @@ Trunk (Unreleased)
 
     HDFS-8800. hdfs --daemon stop namenode corrupts logs (John Smith via aw)
 
+    BREAKDOWN OF HDFS-7285 SUBTASKS AND RELATED JIRAS
+
+      HDFS-7347. Configurable erasure coding policy for individual files and
+      directories ( Zhe Zhang via vinayakumarb )
+
+      HDFS-7339. Representing striped block groups in NameNode with hierarchical
+      naming protocol ( Zhe Zhang )
+
+      HDFS-7652. Process block reports for erasure coded blocks (Zhe Zhang)
+
+      HDFS-7716. Erasure Coding: extend BlockInfo to handle EC info (Jing Zhao)
+
+      HDFS-7749. Erasure Coding: Add striped block support in INodeFile (Jing Zhao)
+
+      HDFS-7837. Erasure Coding: allocate and persist striped blocks in NameNode
+      (Jing Zhao via Zhe Zhang)
+
+      HDFS-7872. Erasure Coding: INodeFile.dumpTreeRecursively() supports to print
+      striped blocks (Takuya Fukudome via jing9)
+
+      HDFS-7853. Erasure coding: extend LocatedBlocks to support reading from
+      striped files (Jing Zhao)
+
+      HDFS-7826. Erasure Coding: Update INodeFile quota computation for striped
+      blocks ( Kai Sasaki via jing9 )
+
+      HDFS-7912. Erasure Coding: track BlockInfo instead of Block in
+      UnderReplicatedBlocks and PendingReplicationBlocks (Jing Zhao)
+
+      HDFS-7369. Erasure coding: distribute recovery work for striped blocks to
+      DataNode (Zhe Zhang)
+
+      HDFS-7864. Erasure Coding: Update safemode calculation for striped blocks
+      (GAO Rui via jing9)
+
+      HDFS-7827. Erasure Coding: support striped blocks in non-protobuf fsimage
+      ( Hui Zheng via jing9 )
+
+      HDFS-7616. Add a test for BlockGroup support in FSImage.
+      (Takuya Fukudome via szetszwo)
+
+      HDFS-7907. Erasure Coding: track invalid, corrupt, and under-recovery striped
+      blocks in NameNode (Jing Zhao)
+
+      HDFS-8005. Erasure Coding: simplify striped block recovery work computation
+      and add tests (Jing Zhao)
+
+      HDFS-7617. Add unit tests for editlog transactions for EC
+      (Hui Zheng via Zhe Zhang)
+
+      HDFS-7839. Erasure coding: implement facilities in NameNode to create and
+      manage EC zones (Zhe Zhang)
+
+      HDFS-7969. Erasure coding: NameNode support for lease recovery of striped
+      block groups. (Zhe Zhang)
+
+      HDFS-7782. Erasure coding: pread from files in striped layout.
+      (Zhe Zhang and Jing Zhao via Zhe Zhang)
+
+      HDFS-8023. Erasure Coding: retrieve eraure coding schema for a file from
+      NameNode (vinayakumarb)
+
+      HDFS-8074. Define a system-wide default EC schema. (Kai Zheng)
+
+      HDFS-8077. Erasure coding: fix bugs in EC zone and symlinks.
+      (Jing Zhao and Zhe Zhang via Jing Zhao)
+
+      HDFS-8104. Make hard-coded values consistent with the system default schema first before remove them. (Kai Zheng)
+
+      HDFS-7889. Subclass DFSOutputStream to support writing striping layout files. (Li Bo via Kai Zheng)
+
+      HDFS-8090. Erasure Coding: Add RPC to client-namenode to list all
+      ECSchemas loaded in Namenode. (vinayakumarb)
+
+      HDFS-8122. Erasure Coding: Support specifying ECSchema during creation of ECZone.
+      (Vinayakumar B via Zhe Zhang)
+
+      HDFS-8114. Erasure coding: Add auditlog FSNamesystem#createErasureCodingZone if this
+      operation fails. (Rakesh R via Zhe Zhang)
+
+      HDFS-8123. Erasure Coding: Better to move EC related proto messages to a
+      separate erasurecoding proto file (Rakesh R via vinayakumarb)
+
+      HDFS-7349. Support DFS command for the EC encoding (vinayakumarb)
+
+      HDFS-8120. Erasure coding: created util class to analyze striped block groups.
+      (Contributed by Zhe Zhang and Li Bo via Jing Zhao)
+
+      HDFS-7994. Detect if resevered EC Block ID is already used during namenode
+      startup. (Hui Zheng via szetszwo)
+
+      HDFS-8167. BlockManager.addBlockCollectionWithCheck should check if the block is a striped block. (Hui Zheng via zhz).
+
+      HDFS-8166. DFSStripedOutputStream should not create empty blocks. (Jing Zhao)
+
+      HDFS-7937. Erasure Coding: INodeFile quota computation unit tests.
+      (Kai Sasaki via Jing Zhao)
+
+      HDFS-8145. Fix the editlog corruption exposed by failed TestAddStripedBlocks.
+      (Jing Zhao)
+
+      HDFS-8146. Protobuf changes for BlockECRecoveryCommand and its fields for
+      making it ready for transfer to DN (Uma Maheswara Rao G via vinayakumarb)
+
+      HDFS-8181. createErasureCodingZone sets retryCache state as false always
+      (Uma Maheswara Rao G via vinayakumarb)
+
+      HDFS-8190. StripedBlockUtil.getInternalBlockLength may have overflow error.
+      (szetszwo)
+
+      HDFS-8216. TestDFSStripedOutputStream should use BlockReaderTestUtil to
+      create BlockReader. (szetszwo via Zhe Zhang)
+
+      HDFS-8212. DistributedFileSystem.createErasureCodingZone should pass schema
+      in FileSystemLinkResolver. (szetszwo via Zhe Zhang)
+
+      HDFS-8024. Erasure Coding: ECworker frame, basics, bootstraping and configuration.
+      (umamahesh)
+
+      HDFS-8156. Add/implement necessary APIs even we just have the system default
+      schema. (Kai Zheng via Zhe Zhang)
+
+      HDFS-8136. Client gets and uses EC schema when reads and writes a stripping
+      file. (Kai Sasaki via Kai Zheng)
+
+      HDFS-8233. Fix DFSStripedOutputStream#getCurrentBlockGroupBytes when the last
+      stripe is at the block group boundary. (jing9)
+
+      HDFS-8223. Should calculate checksum for parity blocks in DFSStripedOutputStream.
+      (Yi Liu via jing9)
+
+      HDFS-8228. Erasure Coding: SequentialBlockGroupIdGenerator#nextValue may cause
+      block id conflicts (Jing Zhao via Zhe Zhang)
+
+      HDFS-8033. Erasure coding: stateful (non-positional) read from files in
+      striped layout (Zhe Zhang)
+
+      HDFS-8230. Erasure Coding: Ignore DatanodeProtocol#DNA_ERASURE_CODING_RECOVERY
+      commands from standbynode if any (vinayakumarb)
+
+      HDFS-8189. ClientProtocol#createErasureCodingZone API was wrongly annotated
+      as Idempotent (vinayakumarb)
+
+      HDFS-8235. Erasure Coding: Create DFSStripedInputStream in DFSClient#open.
+      (Kai Sasaki via jing9)
+
+      HDFS-8272. Erasure Coding: simplify the retry logic in DFSStripedInputStream
+      (stateful read). (Jing Zhao via Zhe Zhang)
+
+      HDFS-8282. Erasure coding: move striped reading logic to StripedBlockUtil.
+      (Zhe Zhang)
+
+      HDFS-8183. Erasure Coding: Improve DFSStripedOutputStream closing of
+      datastreamer threads. (Rakesh R via Zhe Zhang)
+
+      HDFS-8308. Erasure Coding: NameNode may get blocked in waitForLoadingFSImage()
+      when loading editlog. (jing9)
+
+      HDFS-7949. WebImageViewer need support file size calculation with striped
+      blocks. (Rakesh R via Zhe Zhang)
+
+      HDFS-8316. Erasure coding: refactor EC constants to be consistent with HDFS-8249.
+      (Zhe Zhang via jing9)
+
+      HDFS-8281. Erasure Coding: implement parallel stateful reading for striped layout.
+      (jing9)
+
+      HDFS-8137. Send the EC schema to DataNode via EC encoding/recovering command(umamahesh)
+
+      HDFS-8242. Erasure Coding: XML based end-to-end test for ECCli commands
+      (Rakesh R via vinayakumarb)
+
+      HDFS-8324. Add trace info to DFSClient#getErasureCodingZoneInfo(..) (vinayakumarb via
+      umamahesh)
+
+      HDFS-7672. Handle write failure for stripping blocks and refactor the
+      existing code in DFSStripedOutputStream and StripedDataStreamer.  (szetszwo)
+
+      HDFS-7348. Erasure Coding: DataNode reconstruct striped blocks.
+      (Yi Liu via Zhe Zhang)
+
+      HDFS-8334. Erasure coding: rename DFSStripedInputStream related test
+      classes. (Zhe Zhang)
+
+      HDFS-8129. Erasure Coding: Maintain consistent naming for Erasure Coding related classes - EC/ErasureCoding
+      (umamahesh)
+
+      HDFS-8203. Erasure Coding: Seek and other Ops in DFSStripedInputStream.
+      (Yi Liu via jing9)
+
+      HDFS-8289. Erasure Coding: add ECSchema to HdfsFileStatus. (Yong Zhang via
+      jing9)
+
+      HDFS-8355. Erasure Coding: Refactor BlockInfo and BlockInfoUnderConstruction.
+      (Tsz Wo Nicholas Sze via jing9)
+
+      HDFS-7678. Erasure coding: DFSInputStream with decode functionality (pread).
+      (Zhe Zhang)
+
+      HDFS-8372. Erasure coding: compute storage type quotas for striped files,
+      to be consistent with HDFS-8327. (Zhe Zhang via jing9)
+
+      HDFS-8368. Erasure Coding: DFS opening a non-existent file need to be
+      handled properly (Rakesh R via zhz)
+
+      HDFS-8363. Erasure Coding: DFSStripedInputStream#seekToNewSource. (yliu)
+
+      HDFS-8195. Erasure coding: Fix file quota change when we complete/commit
+      the striped blocks. (Takuya Fukudome via zhz)
+
+      HDFS-8364. Erasure coding: fix some minor bugs in EC CLI
+      (Walter Su via vinayakumarb)
+
+      HDFS-8391. NN should consider current EC tasks handling count from DN while
+      assigning new tasks. (umamahesh)
+
+      HDFS-8367. BlockInfoStriped uses EC schema. (Kai Sasaki via Kai Zheng)
+
+      HDFS-8352. Erasure Coding: test webhdfs read write stripe file. (waltersu4549)
+
+      HDFS-8417. Erasure Coding: Pread failed to read data starting from not-first stripe.
+      (Walter Su via jing9)
+
+      HDFS-8418. Fix the isNeededReplication calculation for Striped block in NN.
+      (Yi Liu via jing9)
+
+      HDFS-8320. Erasure coding: consolidate striping-related terminologies. (zhz)
+
+      HDFS-8366. Erasure Coding: Make the timeout parameter of polling blocking queue
+      configurable in DFSStripedOutputStream. (Li Bo)
+
+      HDFS-8378. Erasure Coding: Few improvements for the erasure coding worker.
+      (Rakesh R via waltersu4549)
+
+      HDFS-8375. Add cellSize as an XAttr to ECZone. ( Vinayakumar B via zhz).
+
+      HDFS-8428. Erasure Coding: Fix the NullPointerException when deleting file.
+      (Yi Liu via zhz).
+
+      HDFS-8323. Bump GenerationStamp for write faliure in DFSStripedOutputStream.
+      (Tsz Wo Nicholas Sze via jing9)
+
+      HDFS-8427. Remove dataBlockNum and parityBlockNum from BlockInfoStriped.
+      (Kai Sasaki via jing9)
+
+      HDFS-8186. Erasure coding: Make block placement policy for EC file configurable.
+      (Walter Su via zhz)
+
+      HDFS-8294. Erasure Coding: Fix Findbug warnings present in erasure coding.
+      (Rakesh R via zhz)
+
+      HDFS-8441. Erasure Coding: make condition check earlier for setReplication.
+      (waltersu4549)
+
+      HDFS-7768. Change fsck to support EC files.  (Takanobu Asanuma via szetszwo)
+
+      HDFS-8382. Remove chunkSize and initialize from erasure coder. (Kai Zheng)
+
+      HDFS-8408. Revisit and refactor ErasureCodingInfo (vinayakumarb)
+
+      HDFS-8479. Erasure coding: fix striping related logic in FSDirWriteFileOp to
+      sync with HDFS-8421. (Zhe Zhang via jing9)
+
+      HDFS-8481. Erasure coding: remove workarounds in client side stripped blocks
+      recovering. (zhz)
+
+      HDFS-8336. Expose some administrative erasure coding operations to HdfsAdmin
+      (Uma Maheswara Rao G via vinayakumarb)
+
+      HDFS-8444. Erasure Coding: fix cannot rename a zone dir
+      (Walter Su via vinayakumarb)
+
+      HDFS-8517. Fix a decoding issue in stripped block recovering in client side.
+      (Kai Zheng via jing9)
+
+      HDFS-8453. Erasure coding: properly handle start offset for internal blocks
+      in a block group. (Zhe Zhang via jing9)
+
+      HDFS-7621. Erasure Coding: update the Balancer/Mover data migration logic.
+      (Walter Su via zhz)
+
+      HDFS-8328. Follow-on to update decode for DataNode striped blocks
+      reconstruction. (yliu)
+
+      HDFS-8319. Erasure Coding: support decoding for stateful read.
+      (Jing Zhao via zhz)
+
+      HDFS-8460. Erasure Coding: stateful read result doesn't match data
+      occasionally because of flawed test. (Walter Su via zhz)
+
+      HDFS-8556. Erasure Coding: Fix usage of 'createZone' (vinayakumarb)
+
+      HDFS-8571. Fix TestErasureCodingCli test (Vinayakumar B via waltersu4549)
+
+      HDFS-8450. Erasure Coding: Consolidate erasure coding zone related
+      implementation into a single class (Rakesh R via vinayakumarb)
+
+      HDFS-8585. Erasure Coding: Remove dataBlockNum and parityBlockNum from
+      StripedBlockProto. (Yi Liu via jing9)
+
+      HDFS-8559. Erasure Coding: fix non-protobuf fsimage for striped blocks.
+      (Jing Zhao via yliu)
+
+      HDFS-8580. Erasure coding: Persist cellSize in BlockInfoStriped and
+      StripedBlocksFeature. (Walter Su via jing9)
+
+      HDFS-8466. Refactor BlockInfoContiguous and fix NPE in
+      TestBlockInfo#testCopyConstructor() (vinayakumarb)
+
+      HDFS-8254. Avoid assigning a leading streamer in StripedDataStreamer to
+      tolerate datanode failure. (Tsz Wo Nicholas Sze via jing9)
+
+      HDFS-8543. Erasure Coding: processOverReplicatedBlock() handles striped block.
+      (Walter Su via jing9)
+
+      HDFS-8602. Erasure Coding: Client can't read(decode) the EC files which have
+      corrupt blocks. (jing9 and Kai Sasaki)
+
+      HDFS-8567. Erasure Coding: SafeMode handles file smaller than a full stripe.
+      (Walter Su via jing9)
+
+      HDFS-8253. DFSStripedOutputStream.closeThreads releases cellBuffers
+      multiple times.  (Kai Sasaki via szetszwo)
+
+      HDFS-8468. 2 RPC calls for every file read in DFSClient#open(..) resulting in
+      double Audit log entries (vinayakumarb)
+
+      HDFS-8684. Erasure Coding: fix some block number calculation for striped
+      block. (yliu)
+
+      HDFS-8461. Erasure coding: fix priority level of UnderReplicatedBlocks for
+      striped block. (Walter Su via jing9)
+
+      HDFS-8719. Erasure Coding: client generates too many small packets when
+      writing parity data. (Li Bo via waltersu4549)
+
+      HDFS-8563. Erasure Coding: fsck handles file smaller than a full stripe.
+      (Walter Su via jing9)
+
+      HDFS-8484. Erasure coding: Two contiguous blocks occupy IDs belong to same
+      striped group. (Walter Su via jing9)
+
+      HDFS-8744. Erasure Coding: the number of chunks in packet is not updated
+      when writing parity data. (Li Bo)
+
+      HDFS-8669. Erasure Coding: handle missing internal block locations in
+      DFSStripedInputStream. (jing9)
+
+      HDFS-8702. Erasure coding: update BlockManager.blockHasEnoughRacks(..) logic
+      for striped block. (Kai Sasaki via jing9)
+
+      HDFS-8734. Erasure Coding: fix one cell need two packets. (Walter Su via
+      jing9)
+
+      HDFS-8619. Erasure Coding: revisit replica counting for striped blocks.
+      (Jing Zhao via yliu)
+
+      HDFS-8058. Erasure coding: use BlockInfo[] for both striped and contiguous
+      blocks in INodeFile. (Zhe Zhang and Yi Liu via zhz)
+
+      HDFS-8787. Erasure coding: rename BlockInfoContiguousUC and BlockInfoStripedUC
+      to be consistent with trunk. (zhz)
+
+      HDFS-8433. Erasure coding: set blockToken in LocatedStripedBlock.(waltersu4549)
+
+      HDFS-8760. Erasure Coding: reuse BlockReader when reading the same block in pread.
+      (jing9)
+
+      HDFS-8781. Erasure Coding: Correctly handle BlockManager#InvalidateBlocks for
+      striped block. (Yi Liu via jing9)
+
+      HDFS-8813. Erasure Coding: Client no need to decode missing parity blocks.
+      (Walter Su via jing9)
+
+      HDFS-8798. Erasure Coding: fix DFSStripedInputStream/DFSStripedOutputStream
+      re-fetch token when expired. (Walter Su via jing9)
+
+      HDFS-8769. Erasure coding: unit test for SequentialBlockGroupIdGenerator.
+      (Rakesh R via waltersu4549)
+
+      HDFS-8202. Improve end to end stirpping file test to add erasure recovering
+      test. (Xinwei Qin via zhz)
+
+      HDFS-8804. Erasure Coding: use DirectBufferPool in DFSStripedInputStream for
+      buffer allocation. (jing9)
+
+      HDFS-8399. Erasure Coding: unit test the behaviour of BlockManager recovery
+      work for the deleted blocks. (Rakesh R via zhz)
+
+      HDFS-8857. Erasure Coding: Fix ArrayIndexOutOfBoundsException in
+      TestWriteStripedFileWithFailure. (Li Bo)
+
+      HDFS-8827. Erasure Coding: Fix NPE when NameNode processes over-replicated
+      striped blocks. (Walter Su and Takuya Fukudome via jing9)
+
+      HDFS-8854. Erasure coding: add ECPolicy to replace schema+cellSize in
+      hadoop-hdfs. (Walter Su via zhz)
+
+      HDFS-8220. Erasure Coding: StripedDataStreamer fails to handle the
+      blocklocations which doesn't satisfy BlockGroupSize. (Rakesh R via zhz)
+
+      HDFS-8838. Erasure Coding: Tolerate datanode failures in DFSStripedOutputStream
+      when the data length is small. (szetszwo via waltersu4549)
+
+      HDFS-8909. Erasure coding: update BlockInfoContiguousUC and BlockInfoStripedUC
+      to use BlockUnderConstructionFeature. (Jing Zhao via waltersu4549)
+
+      HDFS-8937. Erasure coding: do not throw exception when setting replication on
+      EC file. (Gao Rui via jing9)
+
+      HDFS-8978. Erasure coding: fix 2 failed tests of DFSStripedOutputStream.
+      (Walter Su via jing9)
+
+      HDFS-8833. Erasure coding: store EC schema and cell size in INodeFile and
+      eliminate notion of EC zones. (zhz)
+
+      HDFS-8853. Erasure Coding: Provide ECSchema validation when setting EC
+      policy. (andreina via zhz)
+
+      HDFS-8975. Erasure coding : Fix random failure in TestSafeModeWithStripedFile
+      (J.Andreina via vinayakumarb)
+
+      HDFS-7351. Document the HDFS Erasure Coding feature.
+      (umamahesh and Zhe Zhang via wang)
+
+      HDFS-8899. Erasure Coding: use threadpool for EC recovery tasks on DataNode.
+      (Rakesh R via zhz)
+
+      HDFS-9088. Cleanup erasure coding documentation. (wang via zhz)
+
+      HDFS-9097. Erasure coding: update EC command "-s" flag to "-p" when
+      specifying policy. (zhz)
+
+      HDFS-9086. Rename dfs.datanode.stripedread.threshold.millis to
+      dfs.datanode.stripedread.timeout.millis. (wang via zhz)
+
+      HDFS-8550. Erasure Coding: Fix FindBugs Multithreaded correctness Warning.
+      (Rakesh R via zhz)
+
+      HDFS-9113. ErasureCodingWorker#processErasureCodingTasks should not fail to process
+      remaining tasks due to one invalid ECTask (umamahesh)
+
+      HDFS-9091. Erasure Coding: Provide DistributedFilesystem API to
+      getAllErasureCodingPolicies. (Rakesh R via zhz)
+
+      HDFS-8920. Erasure Coding: when recovering lost blocks, logs can be too
+      verbose and hurt performance. (Rui Li via Kai Zheng)
+
+      HDFS-8882. Erasure Coding: Use datablocks, parityblocks and cell size from
+      ErasureCodingPolicy (Vinayakumar B via zhz)
+
+      HDFS-9040. Erasure coding: coordinate data streamers in
+      DFSStripedOutputStream. (jing9 and Walter Su)
+
+      HDFS-9185. Fix null tracer in ErasureCodingWorker. (Rakesh R via jing9)
+
+      HDFS-9180. Update excluded DataNodes in DFSStripedOutputStream based on failures
+      in data streamers. (jing9)
+
+      HDFS-8557. Allow to configure RS and XOR raw coders (Kai Zheng)
+
 Release 2.8.0 - UNRELEASED
 
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