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Hudson commented on MAPREDUCE-3738: ----------------------------------- Integrated in Hadoop-Mapreduce-0.23-Build #206 (See [https://builds.apache.org/job/Hadoop-Mapreduce-0.23-Build/206/]) merge MAPREDUCE-3738 from trunk (Revision 1293061) Result = FAILURE sseth : http://svn.apache.org/viewcvs.cgi/?root=Apache-SVN&view=rev&rev=1293061 Files : * /hadoop/common/branches/branch-0.23/hadoop-mapreduce-project/CHANGES.txt * /hadoop/common/branches/branch-0.23/hadoop-mapreduce-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-nodemanager/src/main/java/org/apache/hadoop/yarn/server/nodemanager/containermanager/logaggregation/AppLogAggregatorImpl.java * /hadoop/common/branches/branch-0.23/hadoop-mapreduce-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-nodemanager/src/test/java/org/apache/hadoop/yarn/server/nodemanager/containermanager/logaggregation/TestLogAggregationService.java > NM can hang during shutdown if AppLogAggregatorImpl thread dies unexpectedly > ---------------------------------------------------------------------------- > > Key: MAPREDUCE-3738 > URL: https://issues.apache.org/jira/browse/MAPREDUCE-3738 > Project: Hadoop Map/Reduce > Issue Type: Bug > Components: mrv2, nodemanager > Affects Versions: 0.23.1, 0.24.0 > Reporter: Jason Lowe > Assignee: Jason Lowe > Priority: Critical > Fix For: 0.23.2 > > Attachments: MAPREDUCE-3738.patch, livehistdump.txt > > > If an AppLogAggregator thread dies unexpectedly (e.g.: uncaught exception > like OutOfMemoryError in the case I saw) then this will lead to a hang during > nodemanager shutdown. The NM calls AppLogAggregatorImpl.join() during > shutdown to make sure log aggregation has completed, and that method > internally waits for an atomic boolean to be set by the log aggregation > thread to indicate it has finished. Since the thread was killed off earlier > due to an uncaught exception, the boolean will never be set and the NM hangs > during shutdown repeating something like this every second in the log file: > 2012-01-25 22:20:56,366 INFO > org.apache.hadoop.yarn.server.nodemanager.containermanager.logaggregation.AppLogAggregatorImpl: > Waiting for aggregation to complete for application_1326848182580_2806 -- This message is automatically generated by JIRA. If you think it was sent incorrectly, please contact your JIRA administrators: https://issues.apache.org/jira/secure/ContactAdministrators!default.jspa For more information on JIRA, see: http://www.atlassian.com/software/jira