Json Tu created KAFKA-4447:
------------------------------

             Summary: Controller resigned but it also acts as a controller for 
a long time 
                 Key: KAFKA-4447
                 URL: https://issues.apache.org/jira/browse/KAFKA-4447
             Project: Kafka
          Issue Type: Improvement
          Components: controller
    Affects Versions: 0.10.0.1, 0.10.0.0, 0.9.0.1, 0.9.0.0
         Environment: Linux Os
            Reporter: Json Tu


We have a cluster with 10 nodes,and we execute following operation as below.
1.we execute some topic partition reassign from one node to other 9 nodes in 
the cluster, and which triggered controller.
2.controller invoke PartitionsReassignedListener's handleDataChange and read 
all partition reassign rules from the zk path, and executed all 
onPartitionReassignment for all partition that match conditions.
3.but the controller is expired from zk, after what some nodes of 9 nodes also 
expired from zk.
5.then controller invoke onControllerResignation to resigned as the controller.

we found after the controller is resigned, it acts as controller for about 3 
minutes, which can be found in my attachment.



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