[jira] [Closed] (FLINK-30474) DefaultMultipleComponentLeaderElectionService triggers HA backend change even if it's not the leader

["Matthias Pohl (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/FLINK-30474?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Matthias Pohl closed FLINK-30474.
---------------------------------
    Resolution: Won't Fix

This isn't actually an issue because the {{onLeaderInformationChange}} will only trigger updating the information if there's actually confirmed leader information in place. This isn't the case iff:
# The leadership wasn't granted, yet.
# The leadership was granted but the leader information was not confirmed, yet. In that case, a {{confirmLeadership}} call will follow resulting in the update of the leader information in the HA backend.
# The leadership was revoked.

> DefaultMultipleComponentLeaderElectionService triggers HA backend change even if it's not the leader
> ----------------------------------------------------------------------------------------------------
>
>                 Key: FLINK-30474
>                 URL: https://issues.apache.org/jira/browse/FLINK-30474
>             Project: Flink
>          Issue Type: Sub-task
>          Components: Runtime / Coordination
>    Affects Versions: 1.16.0, 1.17.0, 1.15.3
>            Reporter: Matthias Pohl
>            Assignee: Matthias Pohl
>            Priority: Critical
>              Labels: pull-request-available
>
> {{DefaultMultipleComponentLeaderElectionService}} calls {{LeaderElectionEventHandler#onLeaderInformationChange}} in any case even though the contracts of that method states that it should be only called by the leader to update the HA backend information (see [JavaDoc|https://github.com/apache/flink/blob/5a2f220e31c50306a60aae8281f0ab4073fb85e1/flink-runtime/src/main/java/org/apache/flink/runtime/leaderelection/LeaderElectionEventHandler.java#L46-L50]).



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