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https://issues.apache.org/jira/browse/YARN-3148?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14589823#comment-14589823
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Hudson commented on YARN-3148:
------------------------------

FAILURE: Integrated in Hadoop-Yarn-trunk #961 (See 
[https://builds.apache.org/job/Hadoop-Yarn-trunk/961/])
YARN-3148. Allow CORS related headers to passthrough in (devaraj: rev 
ebb9a82519c622bb898e1eec5798c2298c726694)
* 
hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-web-proxy/src/test/java/org/apache/hadoop/yarn/server/webproxy/TestWebAppProxyServlet.java
* hadoop-yarn-project/CHANGES.txt
* 
hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-web-proxy/src/main/java/org/apache/hadoop/yarn/server/webproxy/WebAppProxyServlet.java


> Allow CORS related headers to passthrough in WebAppProxyServlet
> ---------------------------------------------------------------
>
>                 Key: YARN-3148
>                 URL: https://issues.apache.org/jira/browse/YARN-3148
>             Project: Hadoop YARN
>          Issue Type: Improvement
>    Affects Versions: 2.7.0
>            Reporter: Prakash Ramachandran
>            Assignee: Varun Saxena
>             Fix For: 2.8.0
>
>         Attachments: YARN-3148.001.patch, YARN-3148.02.patch, 
> YARN-3148.03.patch, YARN-3148.04.patch
>
>
> currently the WebAppProxyServlet filters the request headers as defined by  
> passThroughHeaders. Tez UI is building a webapp which using rest api to fetch 
> data from the am via the rm tracking url. 
> for this purpose it would be nice to have additional headers allowed 
> especially the ones related to CORS. A few of them that would help are 
> * Origin
> * Access-Control-Request-Method
> * Access-Control-Request-Headers



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