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From "Benoy Antony (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (MAPREDUCE-2224) Synchronization bugs in JvmManager
Date Thu, 10 May 2012 01:24:49 GMT

     [ 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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