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From "Ashwin Shankar (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-4767) Network issues can cause persistent RM UI outage
Date Wed, 25 May 2016 00:29:12 GMT

    [ https://issues.apache.org/jira/browse/YARN-4767?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15299233#comment-15299233
] 

Ashwin Shankar commented on YARN-4767:
--------------------------------------

At Netflix we are hitting this issue pretty consistently and users can't get to their jobs.
Committers, could you please take a look at the patch? 

> 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
>
>
> 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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