Xintong Song created FLINK-28125:
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Summary: Promote leadership changing logs to INFO level
Key: FLINK-28125
URL: https://issues.apache.org/jira/browse/FLINK-28125
Project: Flink
Issue Type: Improvement
Components: Runtime / Coordination
Reporter: Xintong Song
Currently, {{DefaultLeaderElectionService}} logs leadership changing events in
DEBUG level, expecting the contender to log the changes in INFO level. This is
fragile because there're many different {{LeaderContender}} implementations and
not all of them print the logs properly. E.g.,
{{JobMasterServiceLeadershipRunner}} logs the leadership changes in TRACE level.
I'd suggest to revisit the logging of leadership changing, printing the INFO
logs from {{LeaderElectionService}}. That probably also means removing the
contender side logs to avoid redundancy.
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