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https://issues.apache.org/jira/browse/HADOOP-15717?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16603110#comment-16603110
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Szilard Nemeth commented on HADOOP-15717:
-----------------------------------------
Hi [~gabor.bota]!
The reason for logging the exception is that it helps troubleshooting what
caused the {{IOException}}, as it can come from two different calls from the
try-catch.
I came across a case where {{ tgt.getEndTime()}} was returned null and it
resulted in an {{NPE}}.
I see that you handled this with HADOOP-15593, but apart from logging the fact
that the ticket's endDate was null, we have not logged the exception at all.
Hope this is clear.
> TGT renewal thread does not log IOException
> -------------------------------------------
>
> Key: HADOOP-15717
> URL: https://issues.apache.org/jira/browse/HADOOP-15717
> Project: Hadoop Common
> Issue Type: Improvement
> Reporter: Szilard Nemeth
> Assignee: Szilard Nemeth
> Priority: Major
> Attachments: HADOOP-15717.001.patch
>
>
> See here:
> https://github.com/apache/hadoop/blob/trunk/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/security/UserGroupInformation.java#L918
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