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From "Hudson (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-7182) JMX metrics aren't accessible when NN is busy
Date Sat, 10 Jan 2015 15:28:35 GMT

    [ https://issues.apache.org/jira/browse/HDFS-7182?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14272542#comment-14272542
] 

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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