Rajini Sivaram created KAFKA-9797:
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             Summary: Fix flaky system test 
TestSecurityRollingUpgrade.test_enable_separate_interbroker_listener
                 Key: KAFKA-9797
                 URL: https://issues.apache.org/jira/browse/KAFKA-9797
             Project: Kafka
          Issue Type: Bug
          Components: system tests
            Reporter: Rajini Sivaram
            Assignee: Rajini Sivaram
             Fix For: 2.6.0


TestSecurityRollingUpgrade.test_enable_separate_interbroker_listener is 
supposed to test non-disruptive upgrade of inter-broker listener using rolling 
bounce. But the test updates inter-broker listener without enabling the new 
listener/security_protocol across all brokers, making this a disruptive upgrade 
where brokers are in inconsistent state until all brokers have been upgraded. 
The test must first enable the new listener across all brokers and then update 
the inter-broker listener to the new listener to ensure that the cluster is 
functioning during the upgrade.



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