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https://issues.apache.org/jira/browse/HADOOP-9947?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13764174#comment-13764174
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Kai Zheng commented on HADOOP-9947:
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A patch was attached to HADOOP-9926 with the Kerberos part for this issue.
> Remove Kerberos specific login implementation out of UGI into separate class
> ----------------------------------------------------------------------------
>
> Key: HADOOP-9947
> URL: https://issues.apache.org/jira/browse/HADOOP-9947
> Project: Hadoop Common
> Issue Type: Improvement
> Components: security
> Reporter: Kai Zheng
> Assignee: Kai Zheng
>
> As part of effort in HADOOP-9926 and HADOOP-9797, this particularly focuses
> on removing Kerberos specific login implementations from UGI into separate
> classes based on the new login framework. In this way, keytab login, ticket
> cache login and etc will be taken care of in much modular approach, meanwhile
> it will simplify the UGI class greatly. As good side effect of it, this
> change will also get rid of the relevant statics like keytab, principal etc
> in UGI as such variables will be maintained in separate class. The change
> should be compatible, it refactors and improves the implementation, keeping
> the public API.
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