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From "Sean Mackrory (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-11096) Support rolling upgrade between 2.x and 3.x
Date Tue, 10 Jan 2017 23:20:58 GMT

    [ https://issues.apache.org/jira/browse/HDFS-11096?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15816505#comment-15816505
] 

Sean Mackrory commented on HDFS-11096:
--------------------------------------

The getHdfsBlockLocations removal is documented in HDFS-8895 - apparently that had been deprecated.
I filed HDFS-11312 and posted a patch for the nonDfsUsed discrepancy.


> Support rolling upgrade between 2.x and 3.x
> -------------------------------------------
>
>                 Key: HDFS-11096
>                 URL: https://issues.apache.org/jira/browse/HDFS-11096
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>          Components: rolling upgrades
>    Affects Versions: 3.0.0-alpha1
>            Reporter: Andrew Wang
>            Priority: Blocker
>
> trunk has a minimum software version of 3.0.0-alpha1. This means we can't rolling upgrade
between branch-2 and trunk.
> This is a showstopper for large deployments. Unless there are very compelling reasons
to break compatibility, let's restore the ability to rolling upgrade to 3.x releases.



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