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https://issues.apache.org/jira/browse/HDFS-7849?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Vinayakumar B updated HDFS-7849:
--------------------------------
Resolution: Fixed
Fix Version/s: 2.7.0
Hadoop Flags: Reviewed
Status: Resolved (was: Patch Available)
Committed to trunk, branch-2 and branch-2.7
Thanks for the contribution [~andreina]
Thanks for reporting [~szetszwo]
> Update documentation for enabling a new feature in rolling upgrade
> ------------------------------------------------------------------
>
> Key: HDFS-7849
> URL: https://issues.apache.org/jira/browse/HDFS-7849
> Project: Hadoop HDFS
> Issue Type: Improvement
> Components: documentation
> Reporter: Tsz Wo Nicholas Sze
> Assignee: J.Andreina
> Priority: Minor
> Fix For: 2.7.0
>
> Attachments: HDFS-7849.1.patch, HDFS-7849.2.patch
>
>
> When there is a new feature in a new software, the new feature may not work
> correctly with the old software. In such case, rolling upgrade should be
> done by the following steps:
> # disable the new feature,
> # upgrade the cluster, and
> # enable the new feature.
> We should clarify it in the documentation.
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