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From "Hudson (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (MAPREDUCE-6334) Fetcher#copyMapOutput is leaking usedMemory upon IOException during InMemoryMapOutput shuffle handler
Date Wed, 29 Apr 2015 15:34:06 GMT

    [ https://issues.apache.org/jira/browse/MAPREDUCE-6334?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14519567#comment-14519567
] 

Hudson commented on MAPREDUCE-6334:
-----------------------------------

FAILURE: Integrated in Hadoop-Mapreduce-trunk #2128 (See [https://builds.apache.org/job/Hadoop-Mapreduce-trunk/2128/])
MAPREDUCE-6334. Fetcher#copyMapOutput is leaking usedMemory upon IOException during InMemoryMapOutput
shuffle handler. Contributed by Eric Payne (jlowe: rev bc1bd7e5c4047b374420683d36a8c30eda6d75b6)
* hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-core/src/main/java/org/apache/hadoop/mapreduce/task/reduce/Fetcher.java
* hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-core/src/test/java/org/apache/hadoop/mapreduce/task/reduce/TestFetcher.java
* hadoop-mapreduce-project/CHANGES.txt


> Fetcher#copyMapOutput is leaking usedMemory upon IOException during InMemoryMapOutput
shuffle handler
> -----------------------------------------------------------------------------------------------------
>
>                 Key: MAPREDUCE-6334
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-6334
>             Project: Hadoop Map/Reduce
>          Issue Type: Bug
>    Affects Versions: 2.7.0
>            Reporter: Eric Payne
>            Assignee: Eric Payne
>            Priority: Blocker
>             Fix For: 2.7.1
>
>         Attachments: MAPREDUCE-6334.001.patch, MAPREDUCE-6334.002.patch
>
>
> We are seeing this happen when
> - an NM's disk goes bad during the creation of map output(s)
> - the reducer's fetcher can read the shuffle header and reserve the memory
> - but gets an IOException when trying to shuffle for InMemoryMapOutput
> - shuffle fetch retry is enabled



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