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

["Yi Tang (Jira)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/FLINK-21921?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17306795#comment-17306795 ] 

Yi Tang commented on FLINK-21921:
---------------------------------

cc [~fly_in_gis]

> 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
>            Priority: Major
>
> 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}
> Maybe we should handle it like onModified.



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