C++ kernel not starting

[Pulsar2011]

Hi,
I started the docker following your instruction. I clicked either on C++ 11, 14 or 17 to start C++ session. I started with few simple line of code :

#include
std::cout<<"test"<<std::endl;

And when I click the arrow ... nothing happen. The notebook hang waiting for the kernel to start. Bellow are the message from Jupiter log:

[I 2021-09-20 17:03:44.611 SingleUserNotebookApp restarter:120] KernelRestarter: restarting kernel (1/5), keep random ports
/usr/local/lib/python3.9/json/encoder.py:257: UserWarning: date_default is deprecated since jupyter_client 7.0.0. Use jupyter_client.jsonutil.json_default.
return _iterencode(o, 0)
[W 2021-09-20 17:04:38.808 SingleUserNotebookApp handlers:344] Timeout waiting for kernel_info reply from 46d3613d-e351-499a-9027-aa390fc6b12a
[W 2021-09-20 17:04:38.809 SingleUserNotebookApp handlers:344] Timeout waiting for kernel_info reply from 46d3613d-e351-499a-9027-aa390fc6b12a
[I 2021-09-20 17:04:41.393 JupyterHub log:189] 204 DELETE /hub/api/users/gillard/tokens/a2 (gillard@172.17.0.1) 73.74ms
[W 2021-09-20 17:04:43.454 SingleUserNotebookApp handlers:233] Nudge: attempt 10 on kernel 46d3613d-e351-499a-9027-aa390fc6b12a
[... previous message repeat many ... many times]
Saving file at /Untitled.ipynb
[E 2021-09-20 17:05:38.753 SingleUserNotebookApp web:1789] Uncaught exception GET /user/gillard/api/kernels/46d3613d-e351-499a-9027-aa390fc6b12a/channels?session_id=32b1c354-a33a-4461-a3a8-7a11e461502f (172.17.0.1)
HTTPServerRequest(protocol='http', host='0.0.0.0:8000', method='GET', uri='/user/gillard/api/kernels/46d3613d-e351-499a-9027-aa390fc6b12a/channels?session_id=32b1c354-a33a-4461-a3a8-7a11e461502f', version='HTTP/1.1', remote_ip='172.17.0.1')
Traceback (most recent call last):
File "/usr/local/lib/python3.9/site-packages/tornado/websocket.py", line 956, in _accept_connection
await open_result
File "/usr/local/lib/python3.9/asyncio/tasks.py", line 328, in __wakeup
future.result()
tornado.util.TimeoutError: Timeout
17:05:38.758 [ConfigProxy] error: 503 GET /user/gillard/api/kernels/46d3613d-e351-499a-9027-aa390fc6b12a/channels read ECONNRESET
[E 2021-09-20 17:05:38.765 SingleUserNotebookApp web:1789] Uncaught exception GET /user/gillard/api/kernels/46d3613d-e351-499a-9027-aa390fc6b12a/channels?session_id=2dfe7903-6b34-495e-b63c-b0fdd0e2c376 (172.17.0.1)
HTTPServerRequest(protocol='http', host='0.0.0.0:8000', method='GET', uri='/user/gillard/api/kernels/46d3613d-e351-499a-9027-aa390fc6b12a/channels?session_id=2dfe7903-6b34-495e-b63c-b0fdd0e2c376', version='HTTP/1.1', remote_ip='172.17.0.1')
Traceback (most recent call last):
File "/usr/local/lib/python3.9/site-packages/tornado/websocket.py", line 956, in _accept_connection
await open_result
File "/usr/local/lib/python3.9/asyncio/tasks.py", line 328, in __wakeup
future.result()
tornado.util.TimeoutError: Timeout

What did I do wrong ?

[RattyDAVE]

I don't think you have done anything wrong.

I have seen this issue before and it is when the upstream has done an upgrade.

I will run some tests and see what I can find.

[RattyDAVE]

I have spent some time on this and it is an upstream issue.

The kernels are not being installed now. I need to find a version that works.