[jira] [Commented] (HDFS-16808) HDFS metrics will hold the previous value if there is no new call

["ASF GitHub Bot (Jira)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/HDFS-16808?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17620779#comment-17620779 ] 

ASF GitHub Bot commented on HDFS-16808:
---------------------------------------

ted12138 opened a new pull request, #5049:
URL: https://github.com/apache/hadoop/pull/5049

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> HDFS metrics will hold the previous value if there is no new call
> -----------------------------------------------------------------
>
>                 Key: HDFS-16808
>                 URL: https://issues.apache.org/jira/browse/HDFS-16808
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>          Components: hdfs
>            Reporter: leo sun
>            Priority: Major
>         Attachments: image-2022-10-19-23-59-19-673.png
>
>
> According to the implementation of MutableStat.snapshot(), HDFS metrics will always hold the previous value if there is no more new call.
> It will cause even if user switch active and standby, the previous ANN(standby now) will always output the old value as the pic shows
> !image-2022-10-19-23-59-19-673.png!



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