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https://issues.apache.org/jira/browse/HADOOP-12649?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16501535#comment-16501535
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Steve Loughran commented on HADOOP-12649:
-----------------------------------------
[~m.benalla]: just add a comment on the JIRA saying you are working on it;
submit a patch when you have one as a .patch file, then hit the "submit patch"
button, so jenkins will do a review. I can assign the JIRA to you, but I'd
rather wait until the first patch is in...
> Improve Kerberos 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
> Priority: Major
>
> 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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