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Tsz Wo Nicholas Sze commented on HDFS-7302: ------------------------------------------- Yes. We should print a warning message when "-rollingUpgrade downgrade" is used. The message could simply point to the documentation. > namenode -rollingUpgrade downgrade may finalize a rolling upgrade > ----------------------------------------------------------------- > > Key: HDFS-7302 > URL: https://issues.apache.org/jira/browse/HDFS-7302 > Project: Hadoop HDFS > Issue Type: Bug > Components: namenode > Reporter: Tsz Wo Nicholas Sze > Assignee: Kai Sasaki > > The namenode startup option "-rollingUpgrade downgrade" is originally > designed for downgrading cluster. However, running "namenode -rollingUpgrade > downgrade" with the new software could result in finalizing the ongoing > rolling upgrade. -- This message was sent by Atlassian JIRA (v6.3.4#6332)