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https://issues.apache.org/jira/browse/FLINK-5949?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15894493#comment-15894493
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Till Rohrmann commented on FLINK-5949:
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This should also be relevant for {{1.3.0}}, right?
> Flink on YARN checks for Kerberos credentials for non-Kerberos authentication
> methods
> -------------------------------------------------------------------------------------
>
> Key: FLINK-5949
> URL: https://issues.apache.org/jira/browse/FLINK-5949
> Project: Flink
> Issue Type: Bug
> Components: Security, YARN
> Affects Versions: 1.2.0
> Reporter: Tzu-Li (Gordon) Tai
> Priority: Blocker
> Fix For: 1.2.1
>
>
> Reported in ML:
> http://apache-flink-user-mailing-list-archive.2336050.n4.nabble.com/Flink-Yarn-and-MapR-Kerberos-issue-td11996.html
> The problem is that the Flink on YARN client incorrectly assumes
> {{UserGroupInformation.isSecurityEnabled()}} returns {{true}} only for
> Kerberos authentication modes, whereas it actually returns {{true}} for other
> kinds of authentications too.
> We could make use of {{UserGroupInformation.getAuthenticationMethod()}} to
> check for {{KERBEROS}} only.
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