Roman Khachatryan created FLINK-35933:
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Summary: Skip distributing maxAllowedWatermark if there are no
subtasks
Key: FLINK-35933
URL: https://issues.apache.org/jira/browse/FLINK-35933
Project: Flink
Issue Type: Improvement
Components: Runtime / Coordination
Reporter: Roman Khachatryan
Assignee: Roman Khachatryan
Fix For: 1.20.0
On JM, `SourceCoordinator.announceCombinedWatermark` executes unnecessary if
there are no subtasks to distribute maxAllowedWatermark. This involves Heap and
ConcurrentHashMap accesses and lots of logging.
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