[jira] [Created] (KAFKA-13104) Controller should notify the RaftClient when it resigns

["Jose Armando Garcia Sancio (Jira)" <ji...@apache.org>]

Jose Armando Garcia Sancio created KAFKA-13104:
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             Summary: Controller should notify the RaftClient when it resigns
                 Key: KAFKA-13104
                 URL: https://issues.apache.org/jira/browse/KAFKA-13104
             Project: Kafka
          Issue Type: Bug
          Components: controller, kraft
            Reporter: Jose Armando Garcia Sancio
             Fix For: 3.0.0


{code:java}
      private Throwable handleEventException(String name,
                                             Optional<Long> startProcessingTimeNs,
                                             Throwable exception) {
          ...
          renounce();
          return new UnknownServerException(exception);
      }
 {code}
When the active controller encounters an event exception it attempts to renounce leadership. Unfortunately, this doesn't tell the {{RaftClient}} that it should attempt to give up leadership. This will result in inconsistent state with the {{RaftClient}} as leader but with the controller as inactive.

We should change this implementation so that the active controller asks the {{RaftClient}} to resign. The active controller waits until {{handleLeaderChange}} before calling {{renounce()}}



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