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https://issues.apache.org/jira/browse/HADOOP-9232?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Ivan Mitic updated HADOOP-9232:
-------------------------------

    Attachment: HADOOP-9232.branch-trunk-win.jnigroups.patch

Attaching the patch.

I introduced a separate c file for Windows native implementation, otherwise, 
I'd have to ifdef many places in the file.

TestJNIGroupsMapping passes with the patch. I also verified that HDFS 
(NameNode/DataNode) works fine with the patch (previously NameNode was throwing 
an exception). 

                
> JniBasedUnixGroupsMappingWithFallback fails on Windows with 
> UnsatisfiedLinkError
> --------------------------------------------------------------------------------
>
>                 Key: HADOOP-9232
>                 URL: https://issues.apache.org/jira/browse/HADOOP-9232
>             Project: Hadoop Common
>          Issue Type: Bug
>          Components: native, security
>    Affects Versions: trunk-win
>            Reporter: Chris Nauroth
>            Assignee: Ivan Mitic
>         Attachments: HADOOP-9232.branch-trunk-win.jnigroups.patch
>
>
> {{JniBasedUnixGroupsMapping}} calls native code which isn't implemented 
> properly for Windows, causing {{UnsatisfiedLinkError}}.  The fallback logic 
> in {{JniBasedUnixGroupsMappingWithFallback}} works by checking if the native 
> code is loaded during startup.  In this case, hadoop.dll is present and 
> loaded, but it doesn't contain the right code.  There will be no attempt to 
> fallback to {{ShellBasedUnixGroupsMapping}}.

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