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https://issues.apache.org/jira/browse/HDFS-1922?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13036326#comment-13036326
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Luke Lu commented on HDFS-1922:
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The only difference between the new behavior and metrics v1 is that in metrics
v1, the metrics related mbeans are started whether or not metrics context are
configured.
In hindsight, I think I should've treated missing config as default/empty
config for better compatibility and less surprises. I just opened HADOOP-7306
to revert the metrics system to the old behavior.
> Recurring failure in TestJMXGet.testNameNode since build 477 on May 11
> ----------------------------------------------------------------------
>
> Key: HDFS-1922
> URL: https://issues.apache.org/jira/browse/HDFS-1922
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Components: test
> Reporter: Matt Foley
> Assignee: Luke Lu
> Fix For: 0.23.0
>
> Attachments: hdfs-1922-conf-v1.patch
>
>
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