Maximilian Michels created FLINK-3981:
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Summary: Don't log duplicate TaskManager registrations as
exceptions
Key: FLINK-3981
URL: https://issues.apache.org/jira/browse/FLINK-3981
Project: Flink
Issue Type: Bug
Components: ResourceManager
Affects Versions: 1.1.0
Reporter: Maximilian Michels
Assignee: Maximilian Michels
Priority: Minor
Fix For: 1.1.0
Duplicate TaskManager registrations shouldn't be logged with Exceptions in the
ResourceManager. Duplicate registrations can happen if the TaskManager sends
out registration messages too fast when the actual reply is not lost but still
in transit.
The ResourceManager should simply acknowledge the duplicate registrations,
leaving it up to the JobManager to decide how to treat the duplicate
registrations (currently it will send an AlreadyRegistered to the TaskManager).
This change also affects our test stability because the Yarn tests check the
logs for exceptions.
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