Tzu-Li (Gordon) Tai created FLINK-5949:
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Summary: 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
Affects Versions: 1.2.0
Reporter: Tzu-Li (Gordon) Tai
Priority: Critical
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 should use {{UserGroupInformation.getAuthenticationMethod()}} to check for
{{KERBEROS}} only.
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