zsxwing commented on issue #27789: [SPARK-30541][TEST] testRetry flaky KafkaDelegationTokenSuite URL: https://github.com/apache/spark/pull/27789#issuecomment-594710354 +1 on trying to reproduce it and fix the root issue (or have a confident workaround if that's an issue in an external library). I usually just update `dev/run-tests` to something like: ```shell set -e for i in `seq 0 100`; do build/sbt "sql-kafka-0-10/test-only *KafkaDelegationTokenSuite" done # exec python3 -u ./dev/run-tests.py "$@" ``` and open a PR to run the flaky test 100 (or more) times on Jenkins in one build. If this can reproduce the issue, we can add more logs to investigate further.
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