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From "Chris Douglas (JIRA)" <j...@apache.org>
Subject [jira] Commented: (MAPREDUCE-1497) TaskTracker.indexCache is incorrectly synchronized
Date Tue, 16 Feb 2010 10:21:28 GMT

    [ https://issues.apache.org/jira/browse/MAPREDUCE-1497?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12834146#action_12834146
] 

Chris Douglas commented on MAPREDUCE-1497:
------------------------------------------

{{IndexCache}} is threadsafe. Any synchronization should be for the protection of other data
structures in the block.

> TaskTracker.indexCache is incorrectly synchronized
> --------------------------------------------------
>
>                 Key: MAPREDUCE-1497
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-1497
>             Project: Hadoop Map/Reduce
>          Issue Type: Bug
>          Components: tasktracker
>            Reporter: Amareshwari Sriramadasu
>             Fix For: 0.22.0
>
>
> TaskTracker.indexCache is incorrectly synchronized. 
> It is not accessed synchronously from MapOutputServlet.doGet, TaskCleanupThread and 
TaskTracker.killOverflowingTasks() method. Other callers access it synchronously.

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