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https://issues.apache.org/jira/browse/HDFS-16348?focusedWorklogId=692254&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-692254
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ASF GitHub Bot logged work on HDFS-16348:
-----------------------------------------
Author: ASF GitHub Bot
Created on: 08/Dec/21 06:24
Start Date: 08/Dec/21 06:24
Worklog Time Spent: 10m
Work Description: tasanuma commented on pull request #3704:
URL: https://github.com/apache/hadoop/pull/3704#issuecomment-988535550
@symious Sorry for reviewing it very late. I looked through it, and it
mostly looks good to me.
I have one question. This feature is similar to ECN. The configuration of
ECN is `dfs.pipeline.ecn`, which is for the DataNode configuration.
`dfs.client.mark.slownode.as.badnode` seems the client configuration. If it
works the same way as ECN, it would be better to make it on the DataNode
configuration. What do you think?
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Issue Time Tracking
-------------------
Worklog Id: (was: 692254)
Time Spent: 50m (was: 40m)
> 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
> Time Spent: 50m
> 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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