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https://issues.apache.org/jira/browse/HDFS-17433?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17828574#comment-17828574
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ASF GitHub Bot commented on HDFS-17433:
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hfutatzhanghb opened a new pull request, #6644:
URL: https://github.com/apache/hadoop/pull/6644
### Description of PR
We add an phone alarm on metrics sumOfActorCommandQueueLength when it
beyond 3000.
Recently, we received the alarm and we found that `DatanodeCommand[] cmds`
with array length equals to 0 was
still put into queue and incrActorCmdQueueLength.
When processedCommandsOpAvgTime is high, those empty cmds were put into
queue every heartbeat intervel.
sumOfActorCommandQueueLength should better only record valid commands.
> metrics sumOfActorCommandQueueLength should only record valid commands
> ----------------------------------------------------------------------
>
> Key: HDFS-17433
> URL: https://issues.apache.org/jira/browse/HDFS-17433
> Project: Hadoop HDFS
> Issue Type: Improvement
> Components: datanode
> Affects Versions: 3.4.0
> Reporter: farmmamba
> Assignee: farmmamba
> Priority: Minor
>
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