Chia-Ping Tsai created KAFKA-16639:
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             Summary: AsyncKafkaConsumer#close does not send heartbeat to leave 
group
                 Key: KAFKA-16639
                 URL: https://issues.apache.org/jira/browse/KAFKA-16639
             Project: Kafka
          Issue Type: Bug
            Reporter: Chia-Ping Tsai
            Assignee: Chia-Ping Tsai


This bug can be reproduced by immediately closing a consumer which is just 
created.

The root cause is that we skip the new heartbeat used to leave group when there 
is a in-flight heartbeat request 
([https://github.com/apache/kafka/blob/5de5d967adffd864bad3ec729760a430253abf38/clients/src/main/java/org/apache/kafka/clients/consumer/internals/HeartbeatRequestManager.java#L212).]

It seems to me the simple solution is that we create a heartbeat request when 
meeting above situation and then send it by pollOnClose 
([https://github.com/apache/kafka/blob/5de5d967adffd864bad3ec729760a430253abf38/clients/src/main/java/org/apache/kafka/clients/consumer/internals/RequestManager.java#L62).]

 



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