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https://issues.apache.org/jira/browse/YARN-4767?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15300069#comment-15300069
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Daniel Templeton commented on YARN-4767:
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Here's one more patch that kills one more of the checkstyle issues. The last
two are line length complaints on lines that cannot be shortened without
compromising readability.
[~ashwinshankar77], I'd love to hear more about what you're encountering. Have
you tried applying this patch in your environment? The scenario where the
redirect loop happens is pretty unusual. How come you're seeing it so often?
> Network issues can cause persistent RM UI outage
> ------------------------------------------------
>
> Key: YARN-4767
> URL: https://issues.apache.org/jira/browse/YARN-4767
> Project: Hadoop YARN
> Issue Type: Bug
> Components: webapp
> Affects Versions: 2.9.0
> Reporter: Daniel Templeton
> Assignee: Daniel Templeton
> Priority: Critical
> Attachments: YARN-4767.001.patch, YARN-4767.002.patch,
> YARN-4767.003.patch, YARN-4767.004.patch, YARN-4767.005.patch,
> YARN-4767.006.patch
>
>
> If a network issue causes an AM web app to resolve the RM proxy's address to
> something other than what's listed in the allowed proxies list, the
> AmIpFilter will 302 redirect the RM proxy's request back to the RM proxy.
> The RM proxy will then consume all available handler threads connecting to
> itself over and over, resulting in an outage of the web UI.
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