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https://issues.apache.org/jira/browse/HDFS-15808?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17285261#comment-17285261
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tomscut edited comment on HDFS-15808 at 2/16/21, 3:10 PM:
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OK, thank you for your reply. [~arp]
[~aengineer] [~xyao] Excuse me, do you have time to review the code?
was (Author: tomscut):
OK, thank you for your reply. [~arp]
> Add metrics for FSNamesystem read/write lock hold long time
> -----------------------------------------------------------
>
> Key: HDFS-15808
> URL: https://issues.apache.org/jira/browse/HDFS-15808
> Project: Hadoop HDFS
> Issue Type: Wish
> Components: hdfs
> Reporter: tomscut
> Assignee: tomscut
> Priority: Major
> Labels: hdfs, lock, metrics, pull-request-available
> Time Spent: 2h 20m
> Remaining Estimate: 0h
>
> To monitor how often read/write locks exceed thresholds, we can add two
> metrics(ReadLockWarning/WriteLockWarning), which are exposed in JMX.
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