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https://issues.apache.org/jira/browse/HDFS-15618?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Ahmed Hussein reopened HDFS-15618:
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Reopening to submit a patch for branch-2.10
> Improve datanode shutdown latency
> ---------------------------------
>
> Key: HDFS-15618
> URL: https://issues.apache.org/jira/browse/HDFS-15618
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: datanode
> Reporter: Ahmed Hussein
> Assignee: Ahmed Hussein
> Priority: Major
> Fix For: 3.2.2, 3.3.1, 3.4.0, 3.2.3
>
> Attachments: HDFS-15618-branch-3.3.004.patch, HDFS-15618.001.patch,
> HDFS-15618.002.patch, HDFS-15618.003.patch, HDFS-15618.004.patch
>
>
> The shutdown of Datanode is a very long latency. A block scanner waits for 5
> minutes to join on each VolumeScanner thread.
> Since the scanners are daemon threads and do not alter the block content, it
> is safe to ignore such conditions on shutdown of Datanode.
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