Jiangjie Qin created KAFKA-6304:
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Summary: The controller should allow update the partition
reassignment for the partitions being reassigned
Key: KAFKA-6304
URL: https://issues.apache.org/jira/browse/KAFKA-6304
Project: Kafka
Issue Type: Bug
Reporter: Jiangjie Qin
Currently the controller will not process the partition reassignment of a
partition if the partition is already being reassigned.
The issue is that if there is a broker failure during the partition
reassignment, the partition reassignment may never finish. And the users may
want to cancel the partition reassignment. However, the controller will refuse
to do that unless user manually deletes the partition reassignment zk path,
force a controller switch and then issue the revert command. This is pretty
involved. It seems reasonable for the controller to replace the ongoing stuck
reassignment and replace it with the updated partition assignment.
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