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https://issues.apache.org/jira/browse/KNOX-2381?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Matyas Orhidi updated KNOX-2381:
--------------------------------
    Description: 
This results in blank pages when opening the application master for Flink 
applications. The issue is caused by a rewrite rule:

{code:xml}
<rule dir="OUT" name="YARNUIV2/yarnuiv2/outbound/proxy" 
pattern="*://*:*/proxy/{**}">
  <rewrite template="{$frontend[url]}/yarnuiv2/proxy/{**}"/>
</rule>
{code}

  was:
The trailing slash is missing on the YARNUI/YARNUIV2 components for opening 
application UIs through the ApplicationMaster link. This results in blank pages 
in some cases when opening the application web UI, for example in Flink.

The issue is caused by a rewrite rule:

{code:xml}
<rule dir="OUT" name="YARNUIV2/yarnuiv2/outbound/proxy" 
pattern="*://*:*/proxy/{**}">
  <rewrite template="{$frontend[url]}/yarnuiv2/proxy/{**}"/>
</rule>
{code}


> Tracking UI of flink session is broken in YARNUIV2
> --------------------------------------------------
>
>                 Key: KNOX-2381
>                 URL: https://issues.apache.org/jira/browse/KNOX-2381
>             Project: Apache Knox
>          Issue Type: Bug
>            Reporter: Matyas Orhidi
>            Assignee: Matyas Orhidi
>            Priority: Major
>
> This results in blank pages when opening the application master for Flink 
> applications. The issue is caused by a rewrite rule:
> {code:xml}
> <rule dir="OUT" name="YARNUIV2/yarnuiv2/outbound/proxy" 
> pattern="*://*:*/proxy/{**}">
>   <rewrite template="{$frontend[url]}/yarnuiv2/proxy/{**}"/>
> </rule>
> {code}



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