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From "Jerry Chen (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (MAPREDUCE-4794) DefaultSpeculator generates error messages on normal shutdown
Date Tue, 11 Dec 2012 09:01:25 GMT

    [ https://issues.apache.org/jira/browse/MAPREDUCE-4794?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13528825#comment-13528825
] 

Jerry Chen commented on MAPREDUCE-4794:
---------------------------------------

I reproduced this problem and I will help to fix this.
                
> DefaultSpeculator generates error messages on normal shutdown
> -------------------------------------------------------------
>
>                 Key: MAPREDUCE-4794
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-4794
>             Project: Hadoop Map/Reduce
>          Issue Type: Bug
>          Components: applicationmaster
>    Affects Versions: 0.23.3, 2.0.1-alpha
>            Reporter: Jason Lowe
>
> DefaultSpeculator can log the following error message on a normal shutdown of the ApplicationMaster:
> {noformat}
> 2012-11-13 01:35:31,841 ERROR [DefaultSpeculator background processing] org.apache.hadoop.mapreduce.v2.app.speculate.DefaultSpeculator:
Background thread returning, interrupted : java.lang.InterruptedException
> {noformat}
> and in addition for some reason it logs the corresponding backtrace to stdout.
> Like the errors fixed in MAPREDUCE-4741, this error message in the syslog and backtrace
on stdout can be confusing to users as to whether the job really succeeded.

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