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https://issues.apache.org/jira/browse/HDFS-3133?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Aaron T. Myers resolved HDFS-3133.
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Resolution: Duplicate
Resolving as a duplicate of HDFS-5138, which has a lot more discussion about
how best to do this.
> Add support for DFS upgrade with HA enabled
> -------------------------------------------
>
> Key: HDFS-3133
> URL: https://issues.apache.org/jira/browse/HDFS-3133
> Project: Hadoop HDFS
> Issue Type: Improvement
> Components: ha, namenode
> Affects Versions: 2.0.0-alpha
> Reporter: Aaron T. Myers
>
> For the first implementation of HA NameNode, we punted on allowing DFS
> upgrade with HA enabled, which makes doing a DFS upgrade on an HA-enabled
> cluster quite cumbersome and error-prone. We should add better support for
> this.
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