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Posted to common-issues@hadoop.apache.org by "Daniel Templeton (JIRA)" <ji...@apache.org> on 2015/11/12 23:02:13 UTC

[jira] [Created] (HADOOP-12566) Add NullGroupMapping

Daniel Templeton created HADOOP-12566:
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             Summary: Add NullGroupMapping
                 Key: HADOOP-12566
                 URL: https://issues.apache.org/jira/browse/HADOOP-12566
             Project: Hadoop Common
          Issue Type: Improvement
            Reporter: Daniel Templeton
            Assignee: Daniel Templeton


Add a {{NullGroupMapping}} for cases where user groups are not used.  {{ShellBasedUnixGroupMapping}} can be used in places where latency is not important.  In places like starting a container, it's worth in to avoid the extra fork and exec.



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