Luke Chen created KAFKA-14280:
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Summary: quorum election random backoff always return 0 for 1st
timeout
Key: KAFKA-14280
URL: https://issues.apache.org/jira/browse/KAFKA-14280
Project: Kafka
Issue Type: Bug
Components: kraft
Affects Versions: 3.3.1
Reporter: Luke Chen
Assignee: Luke Chen
When doing quorum election, we added a random election backoff if vote got
rejected or timeout, and hope next round, there will be no conflict between
different voters. But we currently, we calculate the random backoff by:
{code:java}
Math.min(RETRY_BACKOFF_BASE_MS * random.nextInt(2 << Math.min(20, retries - 1)),
raftConfig.electionBackoffMaxMs());{code}
That means, when multiple candidates tried to backoff for the 1st retries, they
will all get 0ms backoff, and then keep conflicting again.
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