Kafka Consumer : Required Properties
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Mind the Offset Gap or un-committed offsets : between offset 1 et offset 3
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The coordinator is the responsible object for communicating to the cluster and for ensuring the committed offsets are produced into the topic.
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If enable.auto.commit = false, then it is a manual management of the offset. |
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commitAsync() is asynchronous = non-blocking but non-deterministic (we don’t know exactly when the commit succeeded or not). And, no retries (commitAsync does not automatically retry when a commit doesn’t happen). Finally, the callback option (is useful) will be triggered upon the commit response from the cluster.
Committing Offsets
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