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https://issues.apache.org/jira/browse/AMBARI-8724?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14250230#comment-14250230
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Alejandro Fernandez commented on AMBARI-8724:
---------------------------------------------
[~ncole]
In MasterHostResolver, if pair is null, it could have failed for various
reasons, even in HA mode. I believe we should only set a single master in the
else clause if we know Namenode is not in HA (i.e., the size of the hosts is
1). Thoughts?
{code}
+ } else {
+ hostsType.master = componentHosts.iterator().next();
}
{code}
Thanks for generalizing it to queryJmxBeanValue(), looks much cleaner!
> Rolling Upgrade - Upgrade Pack to restart standby ResourceManager first,
> failover, and then upgrade the remaining RM
> --------------------------------------------------------------------------------------------------------------------
>
> Key: AMBARI-8724
> URL: https://issues.apache.org/jira/browse/AMBARI-8724
> Project: Ambari
> Issue Type: Technical task
> Components: ambari-server
> Affects Versions: 2.0.0
> Reporter: Alejandro Fernandez
> Assignee: Nate Cole
> Fix For: 2.0.0
>
> Attachments: AMBARI-8724.patch
>
>
> Runbook outlines that RM needs to first upgrade the standby, then failover to
> make the upgrade standby the active, and then upgrade the RM that is now the
> standby.
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