Matthias created FLINK-24169:
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Summary: Flaky local YARN tests relying on log files
Key: FLINK-24169
URL: https://issues.apache.org/jira/browse/FLINK-24169
Project: Flink
Issue Type: Bug
Components: Deployment / YARN
Reporter: Matthias
While working on [PR #16989|https://github.com/apache/flink/pull/16989] for
FLINK-23611, we experienced some flakiness when running
{{YARNSessionCapacitySchedulerITCase.testDetachedPerJobYarnCluster}} locally.
[~dmvk] discovered a bug in log4j (see
[LOG4J2-3155](https://issues.apache.org/jira/browse/LOG4J2-3155)). This does
not seem to be an issue on AzureCI due to the slower hardware used for the
worker machines.
A solution to overcome this issue would be to add a custom log4j configuration
that disables the {{appender.main.policies.startup.type =
OnStartupTriggeringPolicy}} which is present in {{flink-dist}}'s log4j
configuration.
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