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https://issues.apache.org/jira/browse/YARN-7430?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16250334#comment-16250334
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Shane Kumpf commented on YARN-7430:
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Thanks for clarifying, I hadn't considered a system configured to use numeric
usernames, that makes sense. I know there were concerns on YARN-4266 that the
uid:gid mapping approach won't work for all container types, but it seems it
would for the types we support today. [~sidharta-s] [~vvasudev] - what are your
thoughts about enabling uid:gid + group-add by default?
> User and Group mapping are incorrect in docker container
> --------------------------------------------------------
>
> Key: YARN-7430
> URL: https://issues.apache.org/jira/browse/YARN-7430
> Project: Hadoop YARN
> Issue Type: Sub-task
> Components: security, yarn
> Affects Versions: 2.9.0, 3.0.0
> Reporter: Eric Yang
> Assignee: Eric Yang
> Priority: Blocker
> Attachments: YARN-7430.001.patch, YARN-7430.png
>
>
> In YARN-4266, the recommendation was to use -u [uid]:[gid] numeric values to
> enforce user and group for the running user. In YARN-6623, this translated
> to --user=test --group-add=group1. The code no longer enforce group
> correctly for launched process.
> In addition, the implementation in YARN-6623 requires the user and group
> information to exist in container to translate username and group to uid/gid.
> For users on LDAP, there is no good way to populate container with user and
> group information.
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