[jira] [Created] (KAFKA-822) Reassignment of partitions needs a cleanup

["Swapnil Ghike (JIRA)" <ji...@apache.org>]

Swapnil Ghike created KAFKA-822:
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             Summary: Reassignment of partitions needs a cleanup
                 Key: KAFKA-822
                 URL: https://issues.apache.org/jira/browse/KAFKA-822
             Project: Kafka
          Issue Type: Bug
          Components: controller, tools
    Affects Versions: 0.8
            Reporter: Swapnil Ghike
            Assignee: Neha Narkhede


1. This is probably a left-over from when the ReassignPartitionsCommand used to be blocking: 

Currently, for each partition that is reassigned, controller deletes the /admin/reassign_partitions zk path, and populates it with a new list with the reassigned partition removed from the original list. This is probably an overkill, and we can delete the zk path completely once the reassignment of all partitions has completed successfully or in error. 

2. It will help to clarify that there could be no replicas that have started and are not in the ISR when KafkaController.onPartitionReassignment() is called.

3. We should batch the requests in KafkaController.StopOldReplicasOfReassignedPartition()

4. Update controllerContext.partitionReplicaAssignment only once in KafkaController.updateAssignedReplicasForPartition().

5. Need to thoroughly test.

5. Need to thoroughly test



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