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https://issues.apache.org/jira/browse/HDFS-7053?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14131807#comment-14131807
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Jing Zhao commented on HDFS-7053:
---------------------------------
Hi [~sam liu], when you do the rollback, you're actually utilizing upgrade
functionality with version 2.2.0 in HA setup. Unfortunately, HDFS upgrade
(including rollback) in HA is only supported since 2.4.0. Please see HDFS-5138
for details.
> Failed to rollback hdfs version from 2.4.1 to 2.2.0
> ---------------------------------------------------
>
> Key: HDFS-7053
> URL: https://issues.apache.org/jira/browse/HDFS-7053
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: ha, namenode
> Affects Versions: 2.4.1
> Reporter: sam liu
> Priority: Blocker
>
> I can successfully upgrade from 2.2.0 to 2.4.1 with QJM HA enabled and with
> downtime, but failed to rollback from 2.4.1 to 2.2.0. The error message:
> 2014-09-10 16:50:29,599 FATAL
> org.apache.hadoop.hdfs.server.namenode.NameNode: Exception in namenode join
> org.apache.hadoop.HadoopIllegalArgumentException: Invalid startup option.
> Cannot perform DFS upgrade with HA enabled.
> at
> org.apache.hadoop.hdfs.server.namenode.NameNode.createNameNode(NameNode.java:1207)
> at
> org.apache.hadoop.hdfs.server.namenode.NameNode.main(NameNode.java:1320)
> 2014-09-10 16:50:29,601 INFO org.apache.hadoop.util.ExitUtil: Exiting with
> status 1
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