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https://issues.apache.org/jira/browse/YARN-170?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13507056#comment-13507056
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Sandy Ryza commented on YARN-170:
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I put in the license headers, changed the reboot() method to private, and added
a test that makes sure the NodeManager's stop method only gets called once.
> NodeManager stop() gets called twice on shutdown
> ------------------------------------------------
>
> Key: YARN-170
> URL: https://issues.apache.org/jira/browse/YARN-170
> Project: Hadoop YARN
> Issue Type: Bug
> Components: nodemanager
> Affects Versions: 2.0.2-alpha
> Reporter: Sandy Ryza
> Assignee: Sandy Ryza
> Attachments: YARN-170-1.patch, YARN-170-2.patch, YARN-170.patch
>
>
> The stop method in the NodeManager gets called twice when the NodeManager is
> shut down via the shutdown hook.
> The first is the stop that gets called directly by the shutdown hook. The
> second occurs when the NodeStatusUpdaterImpl is stopped. The NodeManager
> responds to the NodeStatusUpdaterImpl stop stateChanged event by stopping
> itself. This is so that NodeStatusUpdaterImpl can notify the NodeManager to
> stop, by stopping itself in response to a request from the ResourceManager
> This could be avoided if the NodeStatusUpdaterImpl were to stop the
> NodeManager by calling its stop method directly.
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