Hi Mike, The controller is responsible for administrative operations, including assigning partitions to brokers and monitoring for broker failures. If we are getting no leaders assigned, one thing you can check is the controller status in the zookeeper cli. To perform ZooKeeper CLI operations you can use the ZooKeeper client by "bin/zkCli.sh" after that execute: get /controller and see if the output is showing an active controller. If the output is showing "null" you can run rmr /controller, this will trigger a new controller assignment. Finally, make sure you don't have authorization issues by checking the server.log files during broker restart. Regards, Manuel.
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