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From "Jonathan Hurley (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (AMBARI-15482) Restarting HDFS Before Upgrade Finalizing Does Not Supply the rollingUpgrade Flag
Date Mon, 21 Mar 2016 14:48:25 GMT

     [ https://issues.apache.org/jira/browse/AMBARI-15482?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Jonathan Hurley updated AMBARI-15482:
-------------------------------------
    Status: Patch Available  (was: Open)

> Restarting HDFS Before Upgrade Finalizing Does Not Supply the rollingUpgrade Flag 
> ----------------------------------------------------------------------------------
>
>                 Key: AMBARI-15482
>                 URL: https://issues.apache.org/jira/browse/AMBARI-15482
>             Project: Ambari
>          Issue Type: Bug
>          Components: ambari-server
>    Affects Versions: 2.0.0
>            Reporter: Jonathan Hurley
>            Assignee: Jonathan Hurley
>            Priority: Critical
>             Fix For: 2.2.2
>
>         Attachments: AMBARI-15482.patch
>
>
> During an upgrade, the HDFS NameNode(s) are restarted with the {{-rollingUpgrade}} flag.
However, it's possible to get to the end of an upgrade and decide to "Finalize Later".
> This allows the cluster to run in the upgraded state before committing to the upgrade.
Full cluster control is returned via the Ambari web client.
> Administrators can then decide to restart a NameNode. Upon restarting the NameNode, it
will produce an error that it was not started with the {{rollingUpgrade}} flag. 
> It seems that as long as an upgrade has not been finalized, the NameNode(s) must be started
with the {{rollingUpgrade}} to allow them to function properly. 
> STR:
> - Perform a rolling upgrade from HDP 2.2 to 2.3 (or 2.3 to 2.4); as long as there is
a major version change.
> - Before finalization, say "Finalize Later". All services should be up and green.
> - Now restart a NameNode



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