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From "Robert Joseph Evans (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (MAPREDUCE-4226) ConcurrentModificationException in FileSystemCounterGroup
Date Mon, 07 May 2012 16:12:47 GMT

    [ https://issues.apache.org/jira/browse/MAPREDUCE-4226?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13269737#comment-13269737
] 

Robert Joseph Evans commented on MAPREDUCE-4226:
------------------------------------------------

I wasn't sure if it was a critical issue or not, because I didn't have much context with how
this class was used.  I am +1 for putting in the patch unchanged.  I still think it needs
to be fixed, mostly as defensive programming so that if things do change in the future this
issue does not crop up.  Especially because it is just a single line change that should not
really impact the performance as it is only being called from something that is holding a
bigger lock.
                
> ConcurrentModificationException in FileSystemCounterGroup
> ---------------------------------------------------------
>
>                 Key: MAPREDUCE-4226
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-4226
>             Project: Hadoop Map/Reduce
>          Issue Type: Bug
>          Components: mrv2
>    Affects Versions: 0.23.1
>            Reporter: Tom White
>            Assignee: Tom White
>         Attachments: MAPREDUCE-4226.patch
>
>
> This was seen in a Hive job. I'll attach a failing test case.

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