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From "Jing Zhao (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-7053) Failed to rollback hdfs version from 2.4.1 to 2.2.0
Date Thu, 18 Sep 2014 20:10:33 GMT

    [ https://issues.apache.org/jira/browse/HDFS-7053?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14139422#comment-14139422
] 

Jing Zhao commented on HDFS-7053:
---------------------------------

I guess you're hitting HDFS-5526?

> 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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