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From "Ming Ma (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HDFS-7182) RollingUpgradeStatus JMX metrics can't be accessed when NN is busy
Date Thu, 02 Oct 2014 19:08:35 GMT

     [ https://issues.apache.org/jira/browse/HDFS-7182?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Ming Ma updated HDFS-7182:
--------------------------
    Attachment: HDFS-7182.patch

getRollingUpgradeStatus doesn't have to take FSNamesystem's read lock.

Also fix the unit test so that any new metrics will be covered automatically.

> RollingUpgradeStatus JMX metrics can't be accessed when NN is busy 
> -------------------------------------------------------------------
>
>                 Key: HDFS-7182
>                 URL: https://issues.apache.org/jira/browse/HDFS-7182
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>            Reporter: Ming Ma
>         Attachments: HDFS-7182.patch
>
>
> HDFS-5693 has addressed all NN JMX metrics in hadoop 2.0.5. Since then couple new metrics
have been added. It turns out "RollingUpgradeStatus" requires FSNamesystem read lock.



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