Github user XuMingmin commented on the issue:
https://github.com/apache/storm/pull/1919
Good point to document the impact, is preparing an update PR.
According to my understand, there's no replay for AT-MOST-ONCE mode in
storm. We use this mode when data missing is not a concern, and want to remove
the overhead of tuple tracking.
With auto-commit enabled, the consumer's offset will be periodically
committed in the background by Kafka consumer, so no need to track commit
offset status with emitted/numUncommittedOffsets manually.
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