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https://issues.apache.org/jira/browse/YARN-3148?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14589690#comment-14589690
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Varun Saxena commented on YARN-3148:
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Thanks [~devaraj.k] for the commit
> 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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