[jira] [Created] (HDFS-7182) RollingUpgradeStatus JMX metrics can't be accessed when NN is busy

[Ming Ma (JIRA)]

Ming Ma created HDFS-7182:
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             Summary: 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


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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