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https://issues.apache.org/jira/browse/HADOOP-13590?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15625141#comment-15625141
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Steve Loughran commented on HADOOP-13590:
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I'm looking at {{getMaxTgtRenewalRetryCount}} and not sure I understand it. I'm
confident I could work out what it does given time, but it's not immediately
obvious. What does it do? And could some comments in the code describe that
Test-wise, I've added support for more backoff in tests that wait; look in
LambdaTestUtils.
I also see that the code to set up a
{{javax.security.auth.login.Configuration}} is surfacing again...there are a
fair few copies of this code around (I know one in the registry tests), all of
which have those same hacks for IBM JVMs, etc. Which makes it a maintenance
pain. Could we think about coalescing them into one or two utility methods
somewhere?
> 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,
> HADOOP-13590.06.patch, HADOOP-13590.07.patch, HADOOP-13590.08.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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