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https://issues.apache.org/jira/browse/YARN-8922?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16657383#comment-16657383
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Robert Kanter commented on YARN-8922:
-------------------------------------
I've tested running {{test-container-executor}} followed by {{cetest}} with all
4 possible ways of running {{test-container-executor}}.
> Fix test-container-executor
> ---------------------------
>
> Key: YARN-8922
> URL: https://issues.apache.org/jira/browse/YARN-8922
> Project: Hadoop YARN
> Issue Type: Bug
> Components: test
> Affects Versions: 3.3.0
> Reporter: Robert Kanter
> Assignee: Robert Kanter
> Priority: Major
> Attachments: YARN-8922.001.patch
>
>
> YARN-8448 attempted to fix the {{test-container-executor}} C test to be able
> to run as root. The test claims that it should be possible to run as root;
> in fact, there are some tests that only run if you use root.
> One of the fixes was to change the permissions of the test's config dir to
> 0777 from 0755. The problem was that the directory was owned by root, but
> then other users would need to write files/directories under it, which would
> fail with 0755. YARN-8448 fixed this by making it 0777. However, this
> breaks running cetest because it expects the directory to be 0755, and it's
> run afterwards.
> The proper fix for all this is to leave the directory at 0755, but to make
> sure it's owned by the "nodemanager" user. Confusingly, in
> {{test-container-executor}}, that appears to be the {{username}} and not the
> {{yarn_username}} (i.e. {{username}} is the user running the NM while
> {{yarn_username}} is just some user running a Yarn app).
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