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From "Tsz Wo Nicholas Sze (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HDFS-7849) Update documentation for enabling a new feature in rolling upgrade
Date Thu, 26 Feb 2015 03:19:04 GMT
Tsz Wo Nicholas Sze created HDFS-7849:
-----------------------------------------

             Summary: 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: Tsz Wo Nicholas Sze
            Priority: Minor


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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