[jira] [Created] (FLINK-21921) Drop ADDED event in callback handler in KubernetesLeaderRetrievalDriver

[Shang Yuanchun (Jira)]

Yi Tang created FLINK-21921:
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             Summary: Drop ADDED event in callback handler in KubernetesLeaderRetrievalDriver
                 Key: FLINK-21921
                 URL: https://issues.apache.org/jira/browse/FLINK-21921
             Project: Flink
          Issue Type: Bug
            Reporter: Yi Tang


The comment is not exactly accurate in case of JM restarting or ConfigMap restarting(KubernetesTooOldResourceVersionException)

{code:java}
private class ConfigMapCallbackHandlerImpl
            implements FlinkKubeClient.WatchCallbackHandler<KubernetesConfigMap> {

        @Override
        public void onAdded(List<KubernetesConfigMap> configMaps) {
            // The ConfigMap is created by KubernetesLeaderElectionDriver with empty data. We do not
            // process this
            // useless event.
        }
{code}



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