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https://issues.apache.org/jira/browse/HDFS-6110?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13955884#comment-13955884
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Todd Lipcon commented on HDFS-6110:
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Patch looks good to me. +1. Please fill in the release note field after
committing - I imagine a lot of folks are going to be curious about these new
warnings and will want to know how to turn it off (eg by setting the warning
level to 60sec or something)
> adding more slow action log in critical write path
> --------------------------------------------------
>
> Key: HDFS-6110
> URL: https://issues.apache.org/jira/browse/HDFS-6110
> Project: Hadoop HDFS
> Issue Type: Improvement
> Components: datanode
> Affects Versions: 3.0.0, 2.3.0
> Reporter: Liang Xie
> Assignee: Liang Xie
> Attachments: HDFS-6110-v2.txt, HDFS-6110.txt, HDFS-6110v3.txt
>
>
> After digging a HBase write spike issue caused by slow buffer io in our
> cluster, just realize we'd better to add more abnormal latency warning log in
> write flow, such that if other guys hit HLog sync spike, we could know more
> detail info from HDFS side at the same time.
> Patch will be uploaded soon.
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