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From "Hudson (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (MAPREDUCE-4730) AM crashes due to OOM while serving up map task completion events
Date Thu, 25 Oct 2012 12:41:20 GMT

    [ https://issues.apache.org/jira/browse/MAPREDUCE-4730?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13484079#comment-13484079
] 

Hudson commented on MAPREDUCE-4730:
-----------------------------------

Integrated in Hadoop-Hdfs-0.23-Build #415 (See [https://builds.apache.org/job/Hadoop-Hdfs-0.23-Build/415/])
    MAPREDUCE-4730. Fix Reducer's EventFetcher to scale the map-completion requests slowly
to avoid HADOOP-8942. Contributed by Jason Lowe.
svn merge --ignore-ancestry -c 1401941 ../../trunk/ (Revision 1401943)

     Result = SUCCESS
vinodkv : http://svn.apache.org/viewcvs.cgi/?root=Apache-SVN&view=rev&rev=1401943
Files : 
* /hadoop/common/branches/branch-0.23/hadoop-mapreduce-project/CHANGES.txt
* /hadoop/common/branches/branch-0.23/hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-core/src/main/java/org/apache/hadoop/mapreduce/task/reduce/EventFetcher.java
* /hadoop/common/branches/branch-0.23/hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-core/src/main/java/org/apache/hadoop/mapreduce/task/reduce/Shuffle.java
* /hadoop/common/branches/branch-0.23/hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-core/src/test/java/org/apache/hadoop/mapreduce/task/reduce/TestEventFetcher.java

                
> AM crashes due to OOM while serving up map task completion events
> -----------------------------------------------------------------
>
>                 Key: MAPREDUCE-4730
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-4730
>             Project: Hadoop Map/Reduce
>          Issue Type: Bug
>          Components: applicationmaster, mrv2
>    Affects Versions: 0.23.3
>            Reporter: Jason Lowe
>            Assignee: Jason Lowe
>            Priority: Blocker
>             Fix For: 2.0.3-alpha, 0.23.5
>
>         Attachments: MAPREDUCE-4730.patch, MAPREDUCE-4730.patch, MAPREDUCE-4730.patch
>
>
> We're seeing a repeatable OOM crash in the AM for a task with around 30000 maps and 3000
reducers.  Details to follow.

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