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Posted to common-issues@hadoop.apache.org by "Karthik Kambatla (JIRA)" <ji...@apache.org> on 2015/12/23 23:33:46 UTC
[jira] [Commented] (HADOOP-12566) Add NullGroupMapping
[ https://issues.apache.org/jira/browse/HADOOP-12566?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15070263#comment-15070263 ]
Karthik Kambatla commented on HADOOP-12566:
-------------------------------------------
Fairly straight-forward patch. +1. Committing this..
> 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
> Attachments: HADOOP-12566.001.patch, HADOOP-12566.002.patch
>
>
> 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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