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https://issues.apache.org/jira/browse/HADOOP-13807?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Wei-Chiu Chuang resolved HADOOP-13807.
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Resolution: Duplicate
Based on my understanding of this jira, it is a dup of HADOOP-13805.
I'll close this jira as a result. Please reopen if this is not the case. Thanks!
> UGI renewal thread should be spawn only if the keytab is not external
> ---------------------------------------------------------------------
>
> Key: HADOOP-13807
> URL: https://issues.apache.org/jira/browse/HADOOP-13807
> Project: Hadoop Common
> Issue Type: Bug
> Components: security
> Affects Versions: 2.7.2, 2.6.4, 3.0.0-alpha1
> Reporter: Alejandro Abdelnur
> Priority: Minor
>
> The renewal thread should not be spawned if the keytab is external.
> Because of HADOOP-13805 there can be a case that an UGI does not have a
> keytab because authentication is managed by the host program. In such case we
> should not spawn the renewal thread.
> Currently this is logging a warning "Exception encountered while running the
> renewal command. Aborting renew thread. " and exiting the thread. The warning
> may be misleading and running the thread is not really needed.
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