Robert Kanter created YARN-8922:
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Summary: 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
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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