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Posted to mapreduce-issues@hadoop.apache.org by "Benoy Antony (JIRA)" <ji...@apache.org> on 2012/05/10 03:24:49 UTC

[jira] [Updated] (MAPREDUCE-2224) Synchronization bugs in JvmManager

     [ https://issues.apache.org/jira/browse/MAPREDUCE-2224?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Benoy Antony updated MAPREDUCE-2224:
------------------------------------

    Attachment: mr-2224-0.22.patch

Patch for 0.22
                
> Synchronization bugs in JvmManager
> ----------------------------------
>
>                 Key: MAPREDUCE-2224
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-2224
>             Project: Hadoop Map/Reduce
>          Issue Type: Bug
>          Components: tasktracker
>    Affects Versions: 0.22.0
>            Reporter: Todd Lipcon
>            Assignee: Todd Lipcon
>            Priority: Critical
>             Fix For: 0.22.0
>
>         Attachments: mapreduce-2224-cdh3.txt, mapreduce-2224.txt, mapreduce-2224.txt, mapreduce-2224.txt, mapreduce-2224.txt, mr-2224-0.22.patch
>
>
> JvmManager.JvmManagerForType has several HashMap members that are inconsistently synchronized. I've seen sporadic NPEs in the 0.20 version of this code which has similar bugs.

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