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https://issues.apache.org/jira/browse/HDFS-9574?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Vinod Kumar Vavilapalli updated HDFS-9574:
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Fix Version/s: (was: 3.0.0)
bq. This is an important improvement for rolling upgrades. Committed to
branch-2.7 and branch-2.6.
+1 for this after the fact.
> Reduce client failures during datanode restart
> ----------------------------------------------
>
> Key: HDFS-9574
> URL: https://issues.apache.org/jira/browse/HDFS-9574
> Project: Hadoop HDFS
> Issue Type: Bug
> Reporter: Kihwal Lee
> Assignee: Kihwal Lee
> Fix For: 2.7.2, 2.6.4
>
> Attachments: HDFS-9574.patch, HDFS-9574.v2.patch,
> HDFS-9574.v3.br26.patch, HDFS-9574.v3.br27.patch, HDFS-9574.v3.patch
>
>
> Since DataXceiverServer is initialized before BP is fully up, client requests
> will fail until the datanode registers.
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