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From "Todd Lipcon (Updated) (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HDFS-2913) Add graceful shutdown command for the NN
Date Thu, 16 Feb 2012 22:25:00 GMT

     [ https://issues.apache.org/jira/browse/HDFS-2913?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Todd Lipcon updated HDFS-2913:
------------------------------

    Target Version/s:   (was: HA branch (HDFS-1623))
             Summary: Add graceful shutdown command for the NN  (was: HA: Need a way to shutdown
the Name Node)

Moved to be a non-HA-specific task, renamed to match the new purpose.
                
> Add graceful shutdown command for the NN
> ----------------------------------------
>
>                 Key: HDFS-2913
>                 URL: https://issues.apache.org/jira/browse/HDFS-2913
>             Project: Hadoop HDFS
>          Issue Type: New Feature
>          Components: name-node
>            Reporter: Bikas Saha
>            Assignee: Bikas Saha
>
> Ideally, NameNode.stop() needs to be called because it will change the HA state and shutdown
all services. NameNode reference is not available anywhere. Hence it is not possible to shutdown
the name node gracefully.
> A possible solution could be to have a Service interface that gets passed down to components
like FSNameSystem, via which they can inform the NameNode about irrecoverable errors. NameNode
could then decide to shutdown.

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