David Arthur created KAFKA-15263:
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Summary: KRaftMigrationDriver can run the migration twice
Key: KAFKA-15263
URL: https://issues.apache.org/jira/browse/KAFKA-15263
Project: Kafka
Issue Type: Bug
Reporter: David Arthur
Assignee: David Arthur
There is a narrow race condition in KRaftMigrationDriver where a PollEvent can
run that sees the internal state as ZK_MIGRATION and is immediately followed by
another poll event (due to external call to {{{}wakeup(){}}}) that results in
two MigrateMetadataEvent being enqueued.
Since MigrateMetadataEvent lacks a check on the internal state, this causes the
metadata migration to occur twice.
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