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From "Devaraj Das (JIRA)" <j...@apache.org>
Subject [jira] Updated: (HADOOP-4924) Race condition in re-init of TaskTracker
Date Tue, 30 Dec 2008 12:10:44 GMT

     [ 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: 0.20.0

> 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: 0.19.1, 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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