Chia-Ping Tsai created KAFKA-21149:
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             Summary: Speed up JoinGracePeriodDurabilityIntegrationTest
                 Key: KAFKA-21149
                 URL: https://issues.apache.org/jira/browse/KAFKA-21149
             Project: Kafka
          Issue Type: Improvement
            Reporter: Chia-Ping Tsai
            Assignee: Chia-Ping Tsai


It can leverage the LEAVE_GROUP to speed up the bounce in 
{{{}shouldRecoverBufferAfterShutdown{}}}, since the restart with the same 
application id waits for the previous member's session timeout otherwise.
{code:java}
            // restart the driver
            
driver.close(CloseOptions.groupMembershipOperation(CloseOptions.GroupMembershipOperation.LEAVE_GROUP));
            assertEquals(KafkaStreams.State.NOT_RUNNING, driver.state()); {code}



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