wangyang0918 commented on a change in pull request #15501:
URL: https://github.com/apache/flink/pull/15501#discussion_r619046613



##########
File path: 
flink-kubernetes/src/main/java/org/apache/flink/kubernetes/highavailability/KubernetesLeaderElectionDriver.java
##########
@@ -105,7 +101,8 @@ public KubernetesLeaderElectionDriver(
         running = true;
         leaderElector.run();
         kubernetesWatch =
-                kubeClient.watchConfigMaps(configMapName, new 
ConfigMapCallbackHandlerImpl());
+                checkNotNull(configMapSharedWatcher, "ConfigMap Shared 
Informer")

Review comment:
       Make sense.




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