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From "Sandy Ryza (JIRA)" <j...@apache.org>
Subject [jira] [Created] (YARN-170) NodeManager stop() gets called twice on shutdown
Date Thu, 18 Oct 2012 20:36:02 GMT
Sandy Ryza created YARN-170:

             Summary: 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

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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