as you can see , iopub_port is duplicated with comm_port port reason : select 5 kernel port is independent with select a random comm_port port <img width="1612" alt="image" src="https://github.com/jupyter-server/gateway_provisioners/assets/4055168/eb36554b-91a8-42df-8e56-dd555b59d2e3"> <img width="859" alt="image" src="https://github.com/jupyter-server/gateway_provisioners/assets/4055168/880a7dce-f058-4d8a-892a-3ba790de24f7">