rondagostino commented on a change in pull request #10105:
URL: https://github.com/apache/kafka/pull/10105#discussion_r580532054



##########
File path: tests/kafkatest/tests/core/round_trip_fault_test.py
##########
@@ -47,32 +55,48 @@ def __init__(self, test_context):
                                      active_topics=active_topics)
 
     def setUp(self):
-        self.zk.start()
+        if self.zk:
+            self.zk.start()
         self.kafka.start()
         self.trogdor.start()
 
     def teardown(self):
         self.trogdor.stop()
         self.kafka.stop()
-        self.zk.stop()
+        if self.zk:
+            self.zk.stop()
 
-    def test_round_trip_workload(self):
+    def remote_quorum_nodes(self):
+        if quorum.for_test(self.test_context) == quorum.zk:
+            return self.zk.nodes
+        elif quorum.for_test(self.test_context) == quorum.remote_raft:
+            return self.kafka.controller_quorum.nodes
+        else: # co-located case, which we currently don't test but handle here 
for completeness in case we do test it
+            return []

Review comment:
       > throw an exception or does the current code actually work for this 
case?
   
   The code always needs `<Kafka nodes>` + `<remote quorum nodes>`, where the 
latter are the ZooKeeper or remote Controller Quorum nodes.  If we were to run 
this test with co-located Raft Quorum controllers then those nodes would be 
accounted for because they are part of the Kafka nodes, so there is no need to 
explicitly add them.  So this code is correct in that it return an empty list 
for that case.  As was indicated in the comment, it's here just in case we ever 
decide we want to test it.




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