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https://issues.apache.org/jira/browse/HDFS-7182?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14252561#comment-14252561
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Hadoop QA commented on HDFS-7182:
---------------------------------
{color:red}-1 overall{color}. Here are the results of testing the latest
attachment
http://issues.apache.org/jira/secure/attachment/12672609/HDFS-7182.patch
against trunk revision 0402bad.
{color:red}-1 patch{color}. The patch command could not apply the patch.
Console output: https://builds.apache.org/job/PreCommit-HDFS-Build/9083//console
This message is automatically generated.
> JMX metrics aren't accessible 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
> Assignee: 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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