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https://issues.apache.org/jira/browse/HADOOP-15765?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17009862#comment-17009862
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Nicholas Marion commented on HADOOP-15765:
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IBM Java has changed it's security classes to use a single class for principal 
and loginmodule,

see HADOOP-16590

> Can not find login module class for IBM due to hard codes
> ---------------------------------------------------------
>
>                 Key: HADOOP-15765
>                 URL: https://issues.apache.org/jira/browse/HADOOP-15765
>             Project: Hadoop Common
>          Issue Type: Bug
>          Components: security
>    Affects Versions: 3.0.3
>            Reporter: Jianfei Jiang
>            Priority: Major
>         Attachments: HADOOP-15765_000.patch
>
>
> As the differences between various versions of IBM, the login module class is 
> sometimes different. However, the class for specified jdk (no matter the 
> version) is hard coded in Hadoop code. We have faced the error like following:
> *javax.security.auth.login.LoginException: unable to find LoginModule class: 
> com.ibm.security.auth.module.LinuxLoginModule*
>  
> Should we set the value as a config which can be set by users?



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