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From "Hemanth Yamijala (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HADOOP-4933) ConcurrentModificationException in JobHistory.java
Date Fri, 30 Oct 2009 13:17:59 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-4933?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12771937#action_12771937
] 

Hemanth Yamijala commented on HADOOP-4933:
------------------------------------------

The existing tests related to job history verify the fix as well. Difficult to specifically
test this condition, because it happens due to concurrent access that is purely timing based.
I am +1 for the patch applied to the Yahoo! hadoop distribution.

> ConcurrentModificationException in JobHistory.java
> --------------------------------------------------
>
>                 Key: HADOOP-4933
>                 URL: https://issues.apache.org/jira/browse/HADOOP-4933
>             Project: Hadoop Common
>          Issue Type: Bug
>    Affects Versions: 0.20.0
>            Reporter: Amar Kamat
>            Assignee: Amar Kamat
>            Priority: Blocker
>             Fix For: 0.21.0
>
>         Attachments: HADOOP-4933-v1.1.patch
>
>
> {{JobHistory.java}} throws {{ConcurrentModificationException}} while finding out the
job history version.

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