Chia-Ping Tsai created KAFKA-20119:
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             Summary: Clarify that `Consumer#unsubscribe` does not trigger 
auto-commit
                 Key: KAFKA-20119
                 URL: https://issues.apache.org/jira/browse/KAFKA-20119
             Project: Kafka
          Issue Type: Improvement
            Reporter: Chia-Ping Tsai
            Assignee: Chia-Ping Tsai


I suggest adding a note to clarify that unsubscribe() does not guarantee a 
commit, which could lead to duplicate processing if offsets are not manually 
committed.

{code:java}
Note: Unlike close(), this method does not guarantee that pending offsets are 
committed before unsubscribing, even if enable.auto.commit is enabled. To avoid 
duplicate processing upon re-joining, it is recommended to explicitly call 
{@link #commitSync()} before invoking this method
{code}




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