Github user revans2 commented on the issue:
https://github.com/apache/storm/pull/2054
I have been thinking about this, and I am not sure if a REGEX is really
what we want. Hadoop does this in a semi-standard way using auth_to_local
rules like PAM does.
It might be worth lifting some of that code from hadoop and reusing it here
instead of just a regular expression.
https://github.com/apache/hadoop/blob/trunk/hadoop-common-project/hadoop-auth/src/main/java/org/apache/hadoop/security/authentication/util/KerberosName.java
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