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https://issues.apache.org/jira/browse/HDFS-8991?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15359754#comment-15359754
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Jitendra Nath Pandey edited comment on HDFS-8991 at 7/1/16 10:57 PM:
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Could you please paste the output of the jmx before and after this patch,
covering the relevant parts of the output?
was (Author: jnp):
Could you please paste the out of the jmx before and after this patch, covering
the relevant parts of the output?
> Provide information on BPOfferService in DN JMX
> -----------------------------------------------
>
> Key: HDFS-8991
> URL: https://issues.apache.org/jira/browse/HDFS-8991
> Project: Hadoop HDFS
> Issue Type: Improvement
> Components: datanode
> Reporter: Haohui Mai
> Assignee: Mingliang Liu
> Attachments: HDFS-8991.000.patch, HDFS-8991.001.patch
>
>
> In cases like HDFS-7714 where the BPOfferService thread is missing, which
> require nontrivial effort to debug that which NN that the DN thinks it active
> / standby.
> It would make sense to make the information more accessible through JMX or
> Web UI.
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