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Posted to mapreduce-issues@hadoop.apache.org by "Jonathan Eagles (JIRA)" <ji...@apache.org> on 2012/04/25 00:02:06 UTC

[jira] [Updated] (MAPREDUCE-4194) ConcurrentModificationError in DirectoryCollection

     [ https://issues.apache.org/jira/browse/MAPREDUCE-4194?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Jonathan Eagles updated MAPREDUCE-4194:
---------------------------------------

    Attachment: MAPREDUCE-4194.patch
    
> ConcurrentModificationError in DirectoryCollection
> --------------------------------------------------
>
>                 Key: MAPREDUCE-4194
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-4194
>             Project: Hadoop Map/Reduce
>          Issue Type: Bug
>          Components: mrv2
>    Affects Versions: 0.23.3, 2.0.0
>            Reporter: Jonathan Eagles
>            Assignee: Jonathan Eagles
>         Attachments: MAPREDUCE-4194.patch
>
>
> As found as part of work on MAPREDUCE-4169, it is possible for a ConcurrentModificationException to be thrown upon disk failure. DirectoryCollection hands out its internal list structure that is accessed across multiple threads. Upon disk failure its internal list is modified, invalidating all current iterators to that structure.

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