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Posted to common-issues@hadoop.apache.org by "Steve Loughran (JIRA)" <ji...@apache.org> on 2015/12/16 14:11:46 UTC

[jira] [Created] (HADOOP-12649) Improve UGI diagnostics and failure handling

Steve Loughran created HADOOP-12649:
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             Summary: Improve UGI diagnostics and failure handling
                 Key: HADOOP-12649
                 URL: https://issues.apache.org/jira/browse/HADOOP-12649
             Project: Hadoop Common
          Issue Type: Improvement
          Components: security
    Affects Versions: 2.7.1
         Environment: Kerberos
            Reporter: Steve Loughran


Sometimes —apparently— some people cannot get kerberos to work.

The ability to diagnose problems here is hampered by some aspects of UGI
# the only way to turn on JAAS debug information is through an env var, not within the JVM
# failures are potentially underlogged
# exceptions raised are generic IOEs, so can't be trapped and filtered
# failure handling on the TGT renewer thread is nonexistent
# the code is barely-readable, underdocumented mess.




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