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https://issues.apache.org/jira/browse/HADOOP-13807?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15677475#comment-15677475
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Xiao Chen commented on HADOOP-13807:
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Thanks [~tucu00] for reporting this.
Do you have the warn logs? Could be helpful to see what the exception is. (Too
bad only versions [only log the exception
message|https://github.com/apache/hadoop/blob/d0a347984da175948b553a675dc357491df2fd0f/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/security/UserGroupInformation.java#L994],
but that's still something...)
Looking at the code I think this (HADOOP-13807) and HADOOP-13805 are mutual
exclusive: this only happens when {{isKeytab}} is false, and HADOOP-13805 only
happens when {{isKeytab}} is true... Whether the keytab is external seems to
only impact {{keytabFile}} parameter. Am I missing something?
> UGI renewal thread should be spawn only if the keytaab 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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