codelipenghui commented on a change in pull request #10165:
URL: https://github.com/apache/pulsar/pull/10165#discussion_r611199961



##########
File path: 
pulsar-broker/src/test/java/org/apache/pulsar/broker/service/TopicOwnerTest.java
##########
@@ -240,6 +245,28 @@ private void 
spyZookeeperToDisconnectAfterPersist(ZooKeeper zooKeeper, RequestMa
         }).when(spyZooKeeperServer).submitRequest(any(Request.class));
     }
 
+    private MutableBoolean listenNamespaceBundleLoading(PulsarService broker, 
NamespaceBundle namespaceBundle) {
+        NamespaceService namespaceService = broker.getNamespaceService();
+        final MutableBoolean loaded = new MutableBoolean();
+        namespaceService.addNamespaceBundleOwnershipListener(new 
NamespaceBundleOwnershipListener() {

Review comment:
       If call listenNamespaceBundleLoading multiple times, it will register 
multiple listeners to the namespace service, is this an expected behavior for 
your test? In my opinion, we only need to add one listener for the same purpose?
   
   And the MutableBoolean will be changed during the test execution, I noticed 
the MutableBoolean is used for asserting, this will introduce flaky tests.




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