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From "Hudson (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (MAPREDUCE-3862) Nodemanager can appear to hang on shutdown due to lingering DeletionService threads
Date Fri, 17 Feb 2012 23:10:57 GMT

    [ https://issues.apache.org/jira/browse/MAPREDUCE-3862?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13210657#comment-13210657
] 

Hudson commented on MAPREDUCE-3862:
-----------------------------------

Integrated in Hadoop-Common-0.23-Commit #568 (See [https://builds.apache.org/job/Hadoop-Common-0.23-Commit/568/])
    svn merge -c 1245781 from trunk to branch 0.23 FIXES MAPREDUCE-3862. Nodemanager can appear
to hang on shutdown due to lingering DeletionService threads (Jason Lowe via bobby) (Revision
1245794)

     Result = SUCCESS
bobby : http://svn.apache.org/viewcvs.cgi/?root=Apache-SVN&view=rev&rev=1245794
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/DeletionService.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/TestDeletionService.java

                
> Nodemanager can appear to hang on shutdown due to lingering DeletionService threads
> -----------------------------------------------------------------------------------
>
>                 Key: MAPREDUCE-3862
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-3862
>             Project: Hadoop Map/Reduce
>          Issue Type: Bug
>          Components: mrv2, nodemanager
>    Affects Versions: 0.23.1
>            Reporter: Jason Lowe
>            Assignee: Jason Lowe
>             Fix For: 0.23.2
>
>         Attachments: MAPREDUCE-3862.patch, MAPREDUCE-3862.patch
>
>
> When a nodemanager attempts to shutdown cleanly, it's possible for it to appear to hang
due to lingering DeletionService threads.  This can occur when yarn.nodemanager.delete.debug-delay-sec
is set to a relatively large value and one or more containers executes on the node shortly
before the shutdown.
> The DeletionService is never calling {{setExecuteExistingDelayedTasksAfterShutdownPolicy()}}
on the ScheduledThreadPoolExecutor, and it defaults to waiting for all scheduled tasks to
complete before exiting.

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