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https://issues.apache.org/jira/browse/HADOOP-18502?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17628465#comment-17628465
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ASF GitHub Bot commented on HADOOP-18502:
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ashutoshcipher commented on PR #5058:
URL: https://github.com/apache/hadoop/pull/5058#issuecomment-1302499545
> @ted12138 Thanks for your contribution. This PR make sense.
>
> Leave some minor comment. Please check it.
>
> @ashutoshcipher Can help review this PR?
Thanks @ZanderXu for involving me. Changes makes sense to me. Good to have
UTs as mentioned by you already.
> Hadoop metrics should return 0 when there is no change
> ------------------------------------------------------
>
> Key: HADOOP-18502
> URL: https://issues.apache.org/jira/browse/HADOOP-18502
> Project: Hadoop Common
> Issue Type: Improvement
> Reporter: leo sun
> Assignee: leo sun
> Priority: Major
> Labels: pull-request-available
> Attachments: image-2022-10-21-14-41-43-105.png
>
>
> When we try to switch active NN to standby, we find that the
> getContentSummary average time is always a very high value even if there is
> no more query. For us, the metrics return 0 is more reasonable. The monitor
> is as below:
> !image-2022-10-21-14-41-43-105.png!
>
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