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Posted to common-dev@hadoop.apache.org by "Devaraj Das (JIRA)" <ji...@apache.org> on 2009/01/21 08:31:02 UTC

[jira] Updated: (HADOOP-4924) Race condition in re-init of TaskTracker

     [ https://issues.apache.org/jira/browse/HADOOP-4924?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Devaraj Das updated HADOOP-4924:
--------------------------------

    Fix Version/s: 0.18.3

I committed this to the 0.18 branch too.

> Race condition in re-init of TaskTracker
> ----------------------------------------
>
>                 Key: HADOOP-4924
>                 URL: https://issues.apache.org/jira/browse/HADOOP-4924
>             Project: Hadoop Core
>          Issue Type: Bug
>            Reporter: Devaraj Das
>            Assignee: Devaraj Das
>            Priority: Blocker
>             Fix For: 0.18.3, 0.19.1, 0.20.0
>
>         Attachments: 4924.patch
>
>
> The taskReportServer is stopped in the TaskTracker.close() method in a thread. The race condition is:
> 1) TaskTracker.close() is invoked - this starts a thread to stop the taskReportServer
> 2) TaskTracker.initialize is invoked - this tries to create a new taskReportServer
> Assume that the thread started to stop the taskReportServer gets to start its work after (2) above. The thread will end up stopping the newly created taskReportServer.

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