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https://issues.apache.org/jira/browse/HADOOP-16517?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16908445#comment-16908445
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Kihwal Lee commented on HADOOP-16517:
-------------------------------------

YARN's WebAppUtils#loadSslConfiguration() does not support this, so will need 
to be modified as well.

> Allow optional mutual TLS in HttpServer2
> ----------------------------------------
>
>                 Key: HADOOP-16517
>                 URL: https://issues.apache.org/jira/browse/HADOOP-16517
>             Project: Hadoop Common
>          Issue Type: Improvement
>            Reporter: Kihwal Lee
>            Assignee: Kihwal Lee
>            Priority: Major
>         Attachments: HADOOP-16517.patch
>
>
> Currently the webservice can enforce mTLS by setting 
> "dfs.client.https.need-auth" on the server side. (The config name is 
> misleading, as it is actually server-side config. It has been deprecated from 
> the client config)  A hadoop client can talk to mTLS enforced web service by 
> setting "hadoop.ssl.require.client.cert" with proper ssl config.
> We have seen use case where mTLS needs to be enabled optionally for only 
> those clients who supplies their cert. In a mixed environment like this, 
> individual services may still enforce mTLS for a subset of endpoints by 
> checking the existence of x509 cert in the request.
>  



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