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https://issues.apache.org/jira/browse/HADOOP-1605?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12519089
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Koji Noguchi commented on HADOOP-1605:
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Does the Namenode restart when any of the critical threads goes away or throws
runtime error?
Not only replicationMonitor thread, but also heartbeatMonitor, leasemonitor,
somethingmonitor, etc .
> Automatic namenode restart when it encounters an error situation
> ----------------------------------------------------------------
>
> Key: HADOOP-1605
> URL: https://issues.apache.org/jira/browse/HADOOP-1605
> Project: Hadoop
> Issue Type: Improvement
> Components: dfs
> Reporter: dhruba borthakur
> Assignee: dhruba borthakur
> Fix For: 0.15.0
>
> Attachments: namenodeRestart4.patch
>
>
> The namenode dies when it encounters an unexpected Runtime Exception.
> Instead, it can catch exceptions, clears up all its internal data structures
> and restarts. This was attempted in HADOOP-1486 earlier.
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