Uncaught exception in ZMQStream callback

[kongming0917]

Hello, I am trying to run the xeus-cling C++ kernel in Jupyter Notebook, but I keep encountering the following error when selecting the xcpp17 kernel:

[E 2025-02-20 03:18:42.135 ServerApp] Uncaught exception in ZMQStream callback
Traceback (most recent call last):
  File "/home/user/miniconda3/envs/cling/lib/python3.10/site-packages/zmq/eventloop/zmqstream.py", line 551, in _run_callback
    f = callback(*args, **kwargs)
  File "/home/user/miniconda3/envs/cling/lib/python3.10/site-packages/jupyter_server/services/kernels/kernelmanager.py", line 600, in record_activity
    parent_msg_type = msg.get("parent_header", {}).get("msg_type", None)
AttributeError: 'NoneType' object has no attribute 'get'

The Jupyter Notebook launches correctly, and I can see the xcpp17 (C++17) kernel in the list of available kernels as below, but when I try to select it, I get the error above.

Available kernels:
  python3    /home/user/miniconda3/envs/cling/share/jupyter/kernels/python3
  xcpp11     /home/user/miniconda3/envs/cling/share/jupyter/kernels/xcpp11
  xcpp14     /home/user/miniconda3/envs/cling/share/jupyter/kernels/xcpp14
  xcpp17     /home/user/miniconda3/envs/cling/share/jupyter/kernels/xcpp17

System Information:

Operating System: Windows 11 (WSL2 - Ubuntu 22.04)
Conda Environment: cling
Python Version: 3.10 (Miniconda)
Jupyter Server Version: 2.15.0
Jupyter Client Version: 8.6.3
ZeroMQ Version: 4.3.5
xeus 3.1.5
xeus-cling Version: 0.15.3
xeus-zmq: 1.1.1

What could be causing this Uncaught exception in ZMQStream callback error?

[anutosh491]

Hey @kongming0917 could you maybe try using a more well updated cpp kernel for now (offer c++20/c++23 too)

https://github.com/compiler-research/xeus-cpp