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https://issues.apache.org/jira/browse/HDFS-11363?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Xiao Chen updated HDFS-11363:
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Target Version/s: 2.9.0
Status: Patch Available (was: Open)
> Need more diagnosis info when seeing Slow waitForAckedSeqno
> -----------------------------------------------------------
>
> Key: HDFS-11363
> URL: https://issues.apache.org/jira/browse/HDFS-11363
> Project: Hadoop HDFS
> Issue Type: Bug
> Reporter: Yongjun Zhang
> Assignee: Xiao Chen
> Attachments: HDFS-11363.01.patch
>
>
> When client writes a file, it may get the following message when ACK doesn't
> get back in a timely manner:
> WARN hdfs.DFSClient: Slow waitForAckedSeqno took 39264ms (threshold=30000ms)
> It would be nice to tell what file it's writing, and what DataNodes are in
> the pipeline, together with this message, to facilitate investigating related
> performance issue.
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