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https://issues.apache.org/jira/browse/HDFS-11188?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15753100#comment-15753100
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Hudson commented on HDFS-11188:
-------------------------------
SUCCESS: Integrated in Jenkins build Hadoop-trunk-Commit #11006 (See
[https://builds.apache.org/job/Hadoop-trunk-Commit/11006/])
HDFS-11188. Change min supported DN and NN versions back to 2.x. (xiao: rev
cee0c468b0ebe2ae8727502620e345745ba11f77)
* (edit)
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/DFSConfigKeys.java
> Change min supported DN and NN versions back to 2.x
> ---------------------------------------------------
>
> Key: HDFS-11188
> URL: https://issues.apache.org/jira/browse/HDFS-11188
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Components: rolling upgrades
> Affects Versions: 3.0.0-alpha1
> Reporter: Andrew Wang
> Assignee: Andrew Wang
> Priority: Critical
> Fix For: 3.0.0-alpha2
>
> Attachments: HDFS-11188.001.patch
>
>
> This is the inverse of HDFS-10398 and HADOOP-13142. Currently, trunk requires
> a software DN and NN version of 3.0.0-alpha1. This means we cannot perform a
> rolling upgrade from 2.x to 3.x.
> The first step towards supporting rolling upgrade is changing these back to a
> 2.x version. For reference, branch-2 has these versions set to "2.1.0-beta".
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