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https://issues.apache.org/jira/browse/HDFS-7182?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14272542#comment-14272542
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Hudson commented on HDFS-7182:
------------------------------
SUCCESS: Integrated in Hadoop-Mapreduce-trunk #2020 (See
[https://builds.apache.org/job/Hadoop-Mapreduce-trunk/2020/])
HDFS-7182. JMX metrics aren't accessible when NN is busy. Contributed by Ming
Ma. (jing9: rev 2a06101e61f2f7a08913c2367d9dbefb910e64a7)
*
hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/namenode/TestFSNamesystemMBean.java
* hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt
*
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/FSNamesystem.java
> 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
> Fix For: 2.7.0
>
> Attachments: HDFS-7182-2.patch, HDFS-7182-3.patch, 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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