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From "Alejandro Abdelnur (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HADOOP-13807) UGI renewal thread should be spawn only if the keytab is not external
Date Wed, 04 Jan 2017 10:03:58 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-13807?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15797839#comment-15797839
] 

Alejandro Abdelnur commented on HADOOP-13807:
---------------------------------------------

[~xiaochen], 

the message was "java.io.IOException: loginUserFromKeyTab must be done first". 

you may be right that HADOOP-13805 may take care of this going away.



> 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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