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https://issues.apache.org/jira/browse/HADOOP-13590?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15507692#comment-15507692
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Steve Loughran commented on HADOOP-13590:
-----------------------------------------

[~owen.omalley] may have something to say, even if he will deny writing the 
original code

> Retry until TGT expires even if the UGI renewal thread encountered exception
> ----------------------------------------------------------------------------
>
>                 Key: HADOOP-13590
>                 URL: https://issues.apache.org/jira/browse/HADOOP-13590
>             Project: Hadoop Common
>          Issue Type: Improvement
>          Components: security
>    Affects Versions: 2.8.0, 2.7.3, 2.6.4
>            Reporter: Xiao Chen
>            Assignee: Xiao Chen
>         Attachments: HADOOP-13590.01.patch, HADOOP-13590.02.patch, 
> HADOOP-13590.03.patch, HADOOP-13590.04.patch
>
>
> The UGI has a background thread to renew the tgt. On exception, it 
> [terminates 
> itself|https://github.com/apache/hadoop/blob/bee9f57f5ca9f037ade932c6fd01b0dad47a1296/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/security/UserGroupInformation.java#L1013-L1014]
> If something temporarily goes wrong that results in an IOE, even if it 
> recovered no renewal will be done and client will eventually fail to 
> authenticate. We should retry with our best effort, until tgt expires, in the 
> hope that the error recovers before that.



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