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Todd Lipcon commented on HDFS-3071: ----------------------------------- I agree. Will do. Thanks for looking. > haadmin failover command does not provide enough detail for when target NN is > not ready to be active > ---------------------------------------------------------------------------------------------------- > > Key: HDFS-3071 > URL: https://issues.apache.org/jira/browse/HDFS-3071 > Project: Hadoop HDFS > Issue Type: Improvement > Components: ha > Affects Versions: 0.24.0 > Reporter: Philip Zeyliger > Assignee: Todd Lipcon > Attachments: hdfs-3071.txt > > > When running the failover command, you can get an error message like the > following: > {quote} > $ hdfs --config $(pwd) haadmin -failover namenode2 namenode1 > Failover failed: xxx.yyy/1.2.3.4:8020 is not ready to become active > {quote} > Unfortunately, the error message doesn't describe why that node isn't ready > to be active. In my case, the target namenode's logs don't indicate anything > either. It turned out that the issue was "Safe mode is ON.Resources are low > on NN. Safe mode must be turned off manually.", but ideally the user would be > told that at the time of the failover. -- This message is automatically generated by JIRA. If you think it was sent incorrectly, please contact your JIRA administrators: https://issues.apache.org/jira/secure/ContactAdministrators!default.jspa For more information on JIRA, see: http://www.atlassian.com/software/jira