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https://issues.apache.org/jira/browse/HADOOP-4924?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Devaraj Das updated HADOOP-4924:
--------------------------------
Attachment: 4924.patch
In the attached patch, I removed the thread doing the taskReportServer.stop().
Instead the TaskTracker.close() stops the taskReportServer inline (this is
anyway required for the case where the config for the TaskTracker specifies the
RPC port as some non-zero number).
> 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: 0.20.0
>
> 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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