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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