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https://issues.apache.org/jira/browse/MAPREDUCE-3738?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13215581#comment-13215581
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Hudson commented on MAPREDUCE-3738:
-----------------------------------
Integrated in Hadoop-Hdfs-0.23-Build #178 (See
[https://builds.apache.org/job/Hadoop-Hdfs-0.23-Build/178/])
merge MAPREDUCE-3738 from trunk (Revision 1293061)
Result = SUCCESS
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
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