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From "Gary Helmling (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HADOOP-13832) Implement a file-based GroupMappingServiceProvider
Date Wed, 23 Nov 2016 23:12:58 GMT
Gary Helmling created HADOOP-13832:

             Summary: Implement a file-based GroupMappingServiceProvider
                 Key: HADOOP-13832
                 URL: https://issues.apache.org/jira/browse/HADOOP-13832
             Project: Hadoop Common
          Issue Type: New Feature
          Components: security
            Reporter: Gary Helmling

In can be useful to decouple Hadoop group membership resolution from OS-level group memberships,
without having to depend on an external system like LDAP.

I'd like to propose a file-based group mapping implementation, which will read group membership
information from a configured file path on the local filesystem, reloading periodically for
changes.  For simplicity, it will use the same file format as /etc/group.

I'm aware of the option for static mappings in core-site.xml, but maintaining these in an
xml file is cumbersome and these are not reloadable.  Having a built-in file-based implementation
will also make this more usable in other systems relying on Hadoop security tooling, such
as HBase.

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