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https://issues.apache.org/jira/browse/HDFS-5905?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Tsz Wo (Nicholas), SZE resolved HDFS-5905.
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Resolution: Duplicate
This was fixed by HDFS-5945.
> Upgrade and rolling upgrade should not be allowed simultaneously
> ----------------------------------------------------------------
>
> Key: HDFS-5905
> URL: https://issues.apache.org/jira/browse/HDFS-5905
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Components: namenode
> Reporter: Tsz Wo (Nicholas), SZE
> Assignee: Tsz Wo (Nicholas), SZE
>
> The existing upgrade/finalize mechanism and the new rolling upgrade mechanism
> are two distinct features for upgrading the HDFS software. They cannot be
> executed simultaneously.
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