Lucas Wang created KAFKA-14424:
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Summary: Cancellation of an ongoing replica reassignment should
have sanity checks
Key: KAFKA-14424
URL: https://issues.apache.org/jira/browse/KAFKA-14424
Project: Kafka
Issue Type: Improvement
Reporter: Lucas Wang
When reassigning replicas, Kafka runs a sanity check to ensure all of the
target replicas are alive before allowing the reassignment request to proceed.
However, for an AlterPartitionReassignments request that cancels an ongoing
reassignment, there is no such check.
The result is that if the original replicas are offline, the cancellation may
result in partitions
without any leaders. This problem has been observed in our clusters.
There should be some sanity check to ensure the cancellation would also land
the partitions in valid states, e.g. by ensuring all of the original replicas
are all alive.
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