Jason Lowe created YARN-3452:
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Summary: Bogus token usernames cause many invalid group lookups
Key: YARN-3452
URL: https://issues.apache.org/jira/browse/YARN-3452
Project: Hadoop YARN
Issue Type: Bug
Components: security
Reporter: Jason Lowe
YARN uses a number of bogus usernames for tokens, like application attempt IDs
for NM tokens or even the hardcoded "testing" for the container localizer
token. These tokens cause the RPC layer to do group lookups on these bogus
usernames which will never succeed but can take a long time to perform.
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