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From "Harsh J (JIRA)" <j...@apache.org>
Subject [jira] [Resolved] (MAPREDUCE-1109) ConcurrentModificationException in jobtracker.jsp
Date Mon, 09 Jul 2012 02:30:34 GMT

     [ https://issues.apache.org/jira/browse/MAPREDUCE-1109?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Harsh J resolved MAPREDUCE-1109.
--------------------------------

    Resolution: Not A Problem

I've not seen this CME occur on the JT UI in 1.x nor heard any further reports of it either.
I'm resolving as Not a Problem for now.
                
> ConcurrentModificationException in jobtracker.jsp
> -------------------------------------------------
>
>                 Key: MAPREDUCE-1109
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-1109
>             Project: Hadoop Map/Reduce
>          Issue Type: Bug
>          Components: jobtracker
>    Affects Versions: 0.20.1
>            Reporter: dhruba borthakur
>            Assignee: Harsh J
>         Attachments: MAPREDUCE-1109.patch, MAPREDUCE-1109.patch
>
>
> The jobtracker.jsp invoked methods tracker.runningJobs(), tracker.completedJobs() and
tracker.failedJobs() but these methods are not synchronized and can cause ConcurrentModificationException
if the JT is concurrently changing the contents of these datastructures.

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