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From "Kai Zheng (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HADOOP-13590) Retry until TGT expires even if the UGI renewal thread encountered exception
Date Thu, 22 Sep 2016 01:50:20 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-13590?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15511820#comment-15511820
] 

Kai Zheng commented on HADOOP-13590:
------------------------------------

Thanks [~xiaochen] for the quick action!

bq. Good news is we can remove the shouldSkipSleepForTests param, making the test more real.
Ah, right! This is exactly what I wanted to say and wish to happen. As we all know, UGI codes
pretty hard to maintain, would love to see some day all the test related codes separated out
and cleaned up ...

I will look at it closely late today.

> 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, HADOOP-13590.05.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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