Jason Gustafson created KAFKA-10661:
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Summary: Add resigned state to raft state machine to preserve
leader/epoch information
Key: KAFKA-10661
URL: https://issues.apache.org/jira/browse/KAFKA-10661
Project: Kafka
Issue Type: Sub-task
Reporter: Jason Gustafson
Assignee: Jason Gustafson
While working on KAFKA-10655, I realized we have a bug in the existing raft
state initialization logic when the process shuts down as leader. After
reinitializing, we retain the current epoch, but we discard the current leader
status. This means that it is possible for the node to vote for another node in
the same epoch that it was the leader of.
To fix this problem I think we should add a separate "resigned" state. When
re-initializing after being shutdown as leader, we can enter the "resigned"
state. This prevents us from voting for another candidate while still ensuring
that a new election needs to be held.
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