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https://issues.apache.org/jira/browse/HDFS-15808?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17287458#comment-17287458
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tomscut edited comment on HDFS-15808 at 2/20/21, 7:18 AM:
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Thanks [~xkrogen] for your good point and [~shv] for your suggestion. I added
the type value on the {{@Metric}} annotation.
was (Author: tomscut):
Thanks [~xkrogen] for your good point and [~shv] for your suggestion. I fixed
it.
> 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
> Attachments: ExpiredHeartbeat.png, lockLongHoldCount
>
> Time Spent: 4.5h
> 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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