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https://issues.apache.org/jira/browse/AMBARI-22679?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Doroszlai, Attila resolved AMBARI-22679.
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Resolution: Fixed
[~dgrinenko], thank you for the fix. Committed to
[trunk|http://git-wip-us.apache.org/repos/asf/ambari/commit/f6ee120e4f].
> RU: Service action failed with NullPointer on Downgrade after RU
> ----------------------------------------------------------------
>
> Key: AMBARI-22679
> URL: https://issues.apache.org/jira/browse/AMBARI-22679
> Project: Ambari
> Issue Type: Bug
> Components: ambari-sever
> Affects Versions: trunk, 2.6.2
> Reporter: Dmytro Grinenko
> Assignee: Dmytro Grinenko
> Priority: Critical
> Fix For: trunk, 2.6.2
>
> Attachments: AMBARI-22679-trunk-fix.patch,
> AMBARI-22679.branch-2.6.patch, AMBARI-22679.trunk.patch
>
>
> STR:
> - Install Ambari
> - Deploy HDP 2.5 with HDFS HA, YARN, MR, ZK
> - Install HDP 2.6 stack
> - Upgrade stack, on finalization initiate downgrade.
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