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https://issues.apache.org/jira/browse/HADOOP-9969?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16396727#comment-16396727
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caixiaofeng commented on HADOOP-9969:
-------------------------------------

and the code in 2.7.2 is the same as already add the patch

> TGT expiration doesn't trigger Kerberos relogin
> -----------------------------------------------
>
>                 Key: HADOOP-9969
>                 URL: https://issues.apache.org/jira/browse/HADOOP-9969
>             Project: Hadoop Common
>          Issue Type: Bug
>          Components: ipc, security
>    Affects Versions: 2.1.0-beta, 2.5.0, 2.5.2, 2.6.0, 2.6.1, 2.8.0, 2.7.1, 
> 2.6.2, 2.6.3
>         Environment: IBM JDK7
>            Reporter: Yu Gao
>            Priority: Major
>         Attachments: HADOOP-9969.patch, JobTracker.log
>
>
> In HADOOP-9698 & HADOOP-9850, RPC client and Sasl client have been changed to 
> respect the auth method advertised from server, instead of blindly attempting 
> the configured one at client side. However, when TGT has expired, an 
> exception will be thrown from SaslRpcClient#createSaslClient(SaslAuth 
> authType), and at this time the authMethod still holds the initial value 
> which is SIMPLE and never has a chance to be updated with the expected one 
> requested by server, so kerberos relogin will not happen.



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