Merge -r 705419:705420 from trunk to branch-0.17 to fix HADOOP-3127.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/core/branches/branch-0.17@705426 13f79535-47bb-0310-9956-ffa450edef68

src/contrib/hod/CHANGES.txt

@@ -1,6 +1,13 @@
 HOD Change Log
 
 
+Release 0.17.3 - Unreleased 
+
+  BUG FIXES
+
+    HADOOP-3217. Decrease the rate at which the hod queries the resource
+    manager for job status. (Hemanth Yamijala via acmurthy) 
+
 Release 0.17.0 - 2008-05-18
 
   INCOMPATIBLE CHANGES

src/contrib/hod/bin/hod

@@ -152,7 +152,20 @@ defList = { 'hod' : (
               True, None, False, True, 'l'),
 
              ('script-wait-time', 'pos_int', 'Specifies the time to wait before running the script. Used with the hod.script option.',
-              True, 10, False, True, 'W')),
+              True, 10, False, True, 'W'),
+
+             ('job-status-query-interval', 'pos_int', 'Specifies the time between checking for job status', 
+              False, 30, False, True),
+
+             ('job-command-failure-interval', 'pos_int', 'Specifies the time between checking for failed job status or submission commands', 
+              False, 10, False, True),
+
+             ('job-status-query-failure-retries', 'pos_int', 'Specifies the number of times job status failure queries are retried', 
+              False, 3, False, True),
+
+             ('job-submission-failure-retries', 'pos_int', 'Specifies the number of times job submission failure queries are retried',
+              False, 3, False, True)),
+
 
             'resource_manager' : (
              ('id', 'string', 'Batch scheduler ID: torque|condor.',

src/contrib/hod/hodlib/Hod/hadoop.py

@@ -182,22 +182,26 @@ class hadoopCluster:
     return serviceData
   
   def __check_job_status(self):
-    initWaitCount = 20
-    count = 0
+    failureCount = 0
     status = False
     state = 'Q'
-    while state == 'Q':
+    while (state=='Q') or (state==False):
       if hodInterrupt.isSet():
         raise HodInterruptException()
 
       state = self.__nodePool.getJobState()
-      if (state==False) or (state!='Q'):
+      self.__log.debug('job state %s' % state)
+      if state == False:
+        failureCount += 1
+        if (failureCount >= self.__cfg['hod']['job-status-query-failure-retries']):
+          self.__log.debug('Number of retries reached max limit while querying job status')
+          break
+        time.sleep(self.__cfg['hod']['job-command-failure-interval'])
+      elif state!='Q':
         break
-      count = count + 1
-      if count < initWaitCount:
-        time.sleep(0.5)
       else:
-        time.sleep(10)
+        self.__log.debug('querying for job status after job-status-query-interval')
+        time.sleep(self.__cfg['hod']['job-status-query-interval'])
     
     if state and state != 'C':
       status = True
@@ -237,7 +241,7 @@ class hadoopCluster:
           time.sleep(1)
           count = count + 1
           # check to see if the job exited by any chance in that time:
-          if (count % 10 == 0):
+          if (count % self.__cfg['hod']['job-status-query-interval'] == 0):
             if not self.__check_job_status():
               break
 
@@ -256,9 +260,9 @@ class hadoopCluster:
         serviceAddress = xmlrpcClient.getServiceAddr(serviceName)
         if serviceAddress:
           if serviceAddress == 'not found':
-            time.sleep(.5)
+            time.sleep(1)
           # check to see if the job exited by any chance in that time:
-            if (i % 10 == 0):
+            if ((i+1) % self.__cfg['hod']['job-status-query-interval'] == 0):
               if not self.__check_job_status():
                 break
           else:
@@ -420,6 +424,7 @@ class hadoopCluster:
          
   def allocate(self, clusterDir, min, max=None):
     status = 0  
+    failureCount = 0
     self.__svcrgyClient = self.__get_svcrgy_client()
         
     self.__log.debug("allocate %s %s %s" % (clusterDir, min, max))
@@ -432,7 +437,25 @@ class hadoopCluster:
       walltime = None
       if self.__cfg['hod'].has_key('walltime'):
         walltime = self.__cfg['hod']['walltime']
+      
       self.jobId, exitCode = self.__nodePool.submitNodeSet(nodeSet, walltime)
+      # if the job submission returned an error other than no resources
+      # retry a couple of times
+      while (self.jobId is False) and (exitCode != 188):
+        if hodInterrupt.isSet():
+          raise HodInterruptException()
+
+        failureCount += 1
+        if (failureCount >= self.__cfg['hod']['job-status-query-failure-retries']):
+          self.__log.debug("failed submitting job more than the retries. exiting")
+          break
+        else:
+          # wait a bit before retrying
+          time.sleep(self.__cfg['hod']['job-command-failure-interval'])
+          if hodInterrupt.isSet():
+            raise HodInterruptException()
+          self.jobId, exitCode = self.__nodePool.submitNodeSet(nodeSet, walltime)
+
       if self.jobId:
         try:
           jobStatus = self.__check_job_status()
@@ -558,12 +581,12 @@ class hadoopCluster:
         if exitCode == 188:
           self.__log.critical("Request execeeded maximum resource allocation.")
         else:
-          self.__log.critical("Insufficient resources available.")
+          self.__log.critical("Job submission failed with exit code %s" % exitCode)
         status = 4
-      else:    
+      else:
         self.__log.critical("Scheduler failure, allocation failed.\n\n")        
         status = 4
-    
+
     return status
 
   def __isRingMasterAlive(self, rmAddr):

src/contrib/hod/hodlib/NodePools/torque.py

@@ -265,23 +265,12 @@ class TorquePool(NodePool):
     return id
 
   def getJobState(self):
-    #torque error code when credentials fail, a temporary condition sometimes.
-    credFailureErrorCode = 171 
-    credFailureRetries = 10
-    i = 0
     jobState = False
     
-    while i < credFailureRetries:
-      qstatInfo, exitCode = self.__torque.qstat(self.getServiceId())
-      if exitCode == 0:
-        jobState = qstatInfo['job_state'] 
-        break
-      else:
-        if exitCode == credFailureErrorCode:
-          time.sleep(1)
-          i = i+1
-        else:
-          break
+    qstatInfo, exitCode = self.__torque.qstat(self.getServiceId())
+    if exitCode == 0:
+      jobState = qstatInfo['job_state'] 
+
     return jobState
 
   def deleteJob(self, jobId):