assertEmptyCluster(helixMirrorMakerManager); numBatchBringUpInstances, 0); Thread.sleep(3000); assertInstanceOwnedTopicPartitionsBalanced(helixMirrorMakerManager, numBatchBringUpInstances, 8 * numTotalTopics); numBatchBringUpInstances, numBatchBringUpInstances)); Thread.sleep(3000); assertInstanceOwnedTopicPartitionsBalanced(helixMirrorMakerManager, numBatchBringUpInstances * 2, 8 * numTotalTopics); helixMirrorMakerManager.expandTopicInMirrorMaker(topic, 16); Thread.sleep(3000); assertInstanceOwnedTopicPartitionsBalanced(helixMirrorMakerManager, numBatchBringUpInstances * 2, 8 * numTotalTopics + 8 * (i + 1)); assertInstanceOwnedTopicPartitionsBalanced(helixMirrorMakerManager, totalInstancesSize, 16 * numTotalTopics); totalInstancesSize--; Thread.sleep(3000); assertInstanceOwnedTopicPartitionsBalanced(helixMirrorMakerManager, totalInstancesSize, 16 * numTotalTopics); totalInstancesSize++; Thread.sleep(3000); assertInstanceOwnedTopicPartitionsBalanced(helixMirrorMakerManager, totalInstancesSize, 16 * numTotalTopics);