private OffsetFetchResponse offsetFetchResponse(Errors error, Map<TopicPartition, PartitionData> responseData) {
        return new OffsetFetchResponse(THROTTLE,
                                       Collections.singletonMap(GROUP_ID, error),
                                       Collections.singletonMap(GROUP_ID, responseData));
    }
Test that if the client can send to a node, but doesn't receive a response, it will
disconnect and try a different node.
clients/src/test/java/org/apache/kafka/clients/admin/KafkaAdminClientTest.java