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https://issues.apache.org/jira/browse/HADOOP-8121?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13222618#comment-13222618
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Jonathan Natkins commented on HADOOP-8121:
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I agree that the warning is mostly unavoidable, and I don't think there's any 
particularly good way of dealing with it. It looks like Oracle is working on 
updating some of the APIs 
(http://docs.oracle.com/javase/6/docs/technotes/guides/jndi/index.html contains 
some of the updates), but there doesn't seem to be any new way to get the 
InitialContextFactory. The interwebs generally lead you to something like this:

env.put(Context.INITIAL_CONTEXT_FACTORY, "com.sun.jndi.ldap.LdapCtxFactory");

In fact, this line of code shows up in Oracle's docs (section 15.1 
http://docs.oracle.com/javase/6/docs/technotes/guides/jndi/jndi-ldap.html#pooling)

I think it makes more sense to do the right thing and call the getName() method 
than use a hard-coded string, so if this is alright, I'll just add warning 
suppression.
                
> Active Directory Group Mapping Service
> --------------------------------------
>
>                 Key: HADOOP-8121
>                 URL: https://issues.apache.org/jira/browse/HADOOP-8121
>             Project: Hadoop Common
>          Issue Type: New Feature
>          Components: security
>            Reporter: Jonathan Natkins
>            Assignee: Jonathan Natkins
>         Attachments: HADOOP-8121.2.patch, HADOOP-8121.3.patch, 
> HADOOP-8121.4.patch, HADOOP-8121.5.patch, HADOOP-8121.6.patch, 
> HADOOP-8121.patch
>
>
> Planning on building a group mapping service that will go and talk directly 
> to an Active Directory setup to get group memberships

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