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https://issues.apache.org/jira/browse/HADOOP-11158?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14154326#comment-14154326
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Andrew Wang commented on HADOOP-11158:
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+1 pending thanks ATM

> KerberosAuthenticationHandler should have reasonable default for 
> -----------------------------------------------------------------
>
>                 Key: HADOOP-11158
>                 URL: https://issues.apache.org/jira/browse/HADOOP-11158
>             Project: Hadoop Common
>          Issue Type: Bug
>          Components: security
>    Affects Versions: 2.5.1
>            Reporter: Aaron T. Myers
>            Assignee: Aaron T. Myers
>         Attachments: HADOOP-11158.patch
>
>
> The {{KerberosAuthenticationHandler}} currently defines no default value for 
> the "{{.kerberos.name.rules}}" config key, which means that users who use 
> this class and don't set this setting will get an NPE. We should set the 
> default for this "DEFAULT" like it is for the other Kerberos name mapping 
> properties in Hadoop.



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