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From "Tsz Wo Nicholas Sze (JIRA)" <j...@apache.org>
Subject [jira] [Assigned] (HDFS-7849) Update documentation for enabling a new feature in rolling upgrade
Date Fri, 13 Mar 2015 05:42:38 GMT

     [ https://issues.apache.org/jira/browse/HDFS-7849?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Tsz Wo Nicholas Sze reassigned HDFS-7849:
-----------------------------------------

    Assignee: J.Andreina  (was: Tsz Wo Nicholas Sze)

Sure, thanks a lot!

> 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
>         Attachments: HDFS-7849.1.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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