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https://issues.apache.org/jira/browse/HDFS-16348?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Takanobu Asanuma resolved HDFS-16348.
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Fix Version/s: 3.4.0
Resolution: Fixed
> Mark slownode as badnode to recover pipeline
> --------------------------------------------
>
> Key: HDFS-16348
> URL: https://issues.apache.org/jira/browse/HDFS-16348
> Project: Hadoop HDFS
> Issue Type: Improvement
> Reporter: Janus Chow
> Assignee: Janus Chow
> Priority: Major
> Labels: pull-request-available
> Fix For: 3.4.0
>
> Time Spent: 4h 10m
> Remaining Estimate: 0h
>
> In HDFS-16320, the DataNode can retrieve the SLOW status from each NameNode.
> This ticket is to send this information back to Clients who are writing
> blocks. If a Clients noticed the pipeline is build on a slownode, he/she can
> choose to mark the slownode as a badnode to exclude the node or rebuild a
> pipeline.
> In order to avoid the false positives, we added a config of "threshold", only
> clients continuously receives slownode reply from the same node will the node
> be marked as SLOW.
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