Jose Armando Garcia Sancio created KAFKA-13193:
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             Summary: Replica manager doesn't update partition state when 
transitioning from leader to follower with unknown leader
                 Key: KAFKA-13193
                 URL: https://issues.apache.org/jira/browse/KAFKA-13193
             Project: Kafka
          Issue Type: Bug
          Components: kraft, replication
            Reporter: Jose Armando Garcia Sancio
            Assignee: Jose Armando Garcia Sancio


This issue applies to both the ZK and KRaft implementation of the replica 
manager. In the rare case when a replica transition from leader to follower 
with no leader the partition state is not updated.

This is because when handling makeFollowers the ReplicaManager only updates the 
partition state if the leader is alive. The solution is to always transition to 
follower but not start the fetcher thread if the leader is unknown or not alive.



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