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https://issues.apache.org/jira/browse/HDFS-7932?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14369740#comment-14369740
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Daryn Sharp commented on HDFS-7932:
-----------------------------------
+1 Looks good, definitely need to prevent slow nodes from delaying the upgrade
process.
> Speed up the shutdown of datanode during rolling upgrade
> --------------------------------------------------------
>
> Key: HDFS-7932
> URL: https://issues.apache.org/jira/browse/HDFS-7932
> Project: Hadoop HDFS
> Issue Type: Bug
> Reporter: Kihwal Lee
> Assignee: Kihwal Lee
> Attachments: HDFS-7932.patch, HDFS-7932.patch
>
>
> Datanode normally exits in 3 seconds after receiving {{shutdownDatanode}}
> command. However, sometimes it doesn't, especially when the IO is busy.
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