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https://issues.apache.org/jira/browse/HDFS-11096?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16081348#comment-16081348
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Sean Mackrory commented on HDFS-11096:
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That's a good idea, [~rchiang]. Adding in some delays between each step should
be trivial and would dramatically increase the surface area of the test.
Also, regarding the YARN-3583 issue, it was fortunately addressed by YARN-6143.
I have marked the JIRAs as related.
> 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
> Assignee: Lei (Eddy) Xu
> 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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