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https://issues.apache.org/jira/browse/HDFS-15808?focusedWorklogId=556122&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-556122
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ASF GitHub Bot logged work on HDFS-15808:
-----------------------------------------
Author: ASF GitHub Bot
Created on: 23/Feb/21 01:26
Start Date: 23/Feb/21 01:26
Worklog Time Spent: 10m
Work Description: tomscut commented on pull request #2668:
URL: https://github.com/apache/hadoop/pull/2668#issuecomment-783798764
Failed junit tests
hadoop.hdfs.server.namenode.ha.TestHAAppend
hadoop.hdfs.qjournal.server.TestJournalNodeSync
hadoop.hdfs.server.blockmanagement.TestUnderReplicatedBlocks
hadoop.hdfs.server.datanode.TestBlockScanner
Those failed unit tests were unrelated to the change. And they worked fine
locally.
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Issue Time Tracking
-------------------
Worklog Id: (was: 556122)
Time Spent: 5.5h (was: 5h 20m)
> 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: 5.5h
> 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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