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https://issues.apache.org/jira/browse/HDFS-15727?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17248080#comment-17248080
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Aihua Xu commented on HDFS-15727:
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[~kihwal] Seems it doesn't cause issues but wrong metrics. BTW: this metrics is
actually for 8020 port of the client RPC calls, not for 8022 port of RPC calls
from internal communication.
> RpcQueueTimeAvgTime of the NameNode increases after it becomes StandBy
> ----------------------------------------------------------------------
>
> Key: HDFS-15727
> URL: https://issues.apache.org/jira/browse/HDFS-15727
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: hdfs
> Affects Versions: 2.8.2
> Reporter: Aihua Xu
> Priority: Major
> Attachments: image-2020-12-10-13-30-44-288.png
>
>
> RpcQueueTimeAvgTime of the NameNode increases after it becomes StandBy. It
> will get resolved after it gets restarted. Seems there is something incorrect
> about this metrics.
> See the following graph, the NameNode becomes StandBy at 10:13 while
> RpcQueueTimeAvgTime increases instead.
> !image-2020-12-10-13-30-44-288.png!
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