Jason Gustafson created KAFKA-10527:
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Summary: Voters should always initialize as followers
Key: KAFKA-10527
URL: https://issues.apache.org/jira/browse/KAFKA-10527
Project: Kafka
Issue Type: Sub-task
Reporter: Jason Gustafson
Assignee: Jason Gustafson
The current state initialization logic preserves whatever state the broker was
in when it was shutdown. In particular, if the node was previously a leader, it
will remain a leader. This can be dangerous if we want to consider
optimizations such as in KAFKA-10526 since the leader might lose unflushed data
following the restart. It would be safer to always initialize as a follower so
that a leader's tenure never crosses process restarts. This helps to guarantee
the uniqueness of the (offset, epoch) tuple which the replication protocol
depends on.
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