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https://issues.apache.org/jira/browse/YARN-1525?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13923039#comment-13923039
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Karthik Kambatla commented on YARN-1525:
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bq. In the case the standby RM, where isStandbyMode() returns true and we start
to buildRedirectPath, switches to be active, keeping the variable
RMWebApp#standbyMode allows the behavior to be consistent from the time we
tested isStandbyMode() first in RMDispatcher.service().
I see. This can be a little confusing. Can we change {{boolean isStandbyMode}}
to {{void checkStandbyMode}} and set the field standbyMode. We can then may be
access this field directly or through an accessor.
bq. I've been using a temporary configuration (which you can find from
RMWebApp.getRedirectPath()). I was actually resetting RMid back in the original
code. It was necessary if I was not using a temporary configuration. But I'll
remove them since I've been using temporary configuration.
Now I see why it was working fine. Still, I think we should also fix
RMHAUtils#findActiveRMHAId to use a copy and not mutate the conf that is passed
to it, as this is a util method and will likely be used at other places.
We should also get rid of getting and setting rm-id in
RMWebApp#buildRedirectPath.
> Web UI should redirect to active RM when HA is enabled.
> -------------------------------------------------------
>
> Key: YARN-1525
> URL: https://issues.apache.org/jira/browse/YARN-1525
> Project: Hadoop YARN
> Issue Type: Sub-task
> Reporter: Xuan Gong
> Assignee: Cindy Li
> Attachments: YARN1525.patch, YARN1525.patch, YARN1525.patch,
> YARN1525.patch, YARN1525.patch.v1, YARN1525.patch.v2, YARN1525.patch.v3,
> YARN1525.v7.patch, YARN1525.v7.patch, YARN1525.v8.patch, YARN1525.v9.patch,
> Yarn1525.secure.patch, Yarn1525.secure.patch
>
>
> When failover happens, web UI should redirect to the current active rm.
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