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https://issues.apache.org/jira/browse/HDFS-8211?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14511484#comment-14511484
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Arpit Agarwal commented on HDFS-8211:
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+1 for the new v2 patch, pending Jenkins. Thank you for updating the test case
Anu.
The Jenkins output may be misleading since there are two v2 patches in flight.
Will wait for +1 on the correct patch.
> DataNode UUID is always null in the JMX counter
> -----------------------------------------------
>
> Key: HDFS-8211
> URL: https://issues.apache.org/jira/browse/HDFS-8211
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: HDFS
> Affects Versions: 2.7.0
> Reporter: Anu Engineer
> Assignee: Anu Engineer
> Priority: Minor
> Attachments: hdfs-8211.001.patch, hdfs-8211.002.patch
>
>
> The DataNode JMX counters are tagged with DataNode UUID, but it always gets a
> null value instead of the UUID.
> {code}
> Hadoop:service=DataNode,name=FSDatasetState*-null*.
> {code}
> This null is supposed be the datanode UUID.
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