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From "Aaron Kimball (JIRA)" <j...@apache.org>
Subject [jira] Commented: (MAPREDUCE-1131) Using profilers other than hprof can cause JobClient to report job failure
Date Sat, 07 Nov 2009 01:19:32 GMT

    [ https://issues.apache.org/jira/browse/MAPREDUCE-1131?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12774527#action_12774527
] 

Aaron Kimball commented on MAPREDUCE-1131:
------------------------------------------

Looking at [http://java.sun.com/developer/technicalArticles/Programming/HPROF.html], I think
I'm just going to parse the output of {{conf.getProfileParams()}} to see if it contains the
strings {{-agentlib:hprof}} or {{-Xrunhprof}}. This is likely not a 100% solution, but would
cover an awful lot of uses...

> Using profilers other than hprof can cause JobClient to report job failure
> --------------------------------------------------------------------------
>
>                 Key: MAPREDUCE-1131
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-1131
>             Project: Hadoop Map/Reduce
>          Issue Type: Bug
>          Components: client
>            Reporter: Aaron Kimball
>            Assignee: Aaron Kimball
>         Attachments: MAPREDUCE-1131.2.patch, MAPREDUCE-1131.3.patch, MAPREDUCE-1131.patch
>
>
> If task profiling is enabled, the JobClient will download the {{profile.out}} file created
by the tasks under profile. If this causes an IOException, the job is reported as a failure
to the client, even though all the tasks themselves may complete successfully. The expected
result files are assumed to be generated by hprof. Using the profiling system with other profilers
will cause job failure.

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