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https://issues.apache.org/jira/browse/HDFS-15808?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17282570#comment-17282570
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Erik Krogen commented on HDFS-15808:
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Hi [~tomscut], the proposal looks pretty reasonable to me from a quick glance,
but I'm not working in this area these days so can't allocate time at the
moment. cc some folks that are hopefully more currently relevant: [~shv]
[~daryn] [~vinayakumarb] [~kihwal]
One thing I'll say is that I think "LockWarning" is not a great name, maybe
"LockLongHoldTime" or something similar to be more clear about what it is
measuring.
> Add metrics for FSNamesystem read/write lock warnings
> -----------------------------------------------------
>
> 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: 1h 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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