Debugging error "Couldn't find a debug adapter for debug type python"

[edervishaj]

Environment data

• VS Code version: 1.93.0
• Jupyter Extension version (available under the Extensions sidebar): v2024.8.0
• Python Extension version (available under the Extensions sidebar): v2024.14.0
• OS (Windows | Mac | Linux distro) and version: macOS Sonoma 14.6.1
• Python and/or Anaconda version: Python 3.9, 3.10
• Type of virtual environment used: conda 24.7.1
• Jupyter server running: Local

Actual behaviour

Stepping over breakpoint that calls TF 1.x session.run throws "Couldn't find a debug adapter for debug type python" and the debugger remains running but cannot proceed further.

Logs

Output for Jupyter in the Output panel (View→Output, change the drop-down the upper-right of the Output panel to Jupyter)

21:45:37.178 [debug] [Debug] to kernel: {"command":"threads","type":"request","seq":55}
21:45:37.178 [debug] [Debug] to kernel, mapped: {"command":"threads","type":"request","seq":55}
21:45:37.187 [debug] [Debug] response: {"seq":57,"type":"response","request_seq":55,"success":true,"command":"threads","body":{"threads":[{"id":1,"name":"MainThread"},{"id":2,"name":"Thread-2"},{"id":3,"name":"Thread-3"},{"id":4,"name":"IPythonHistorySavingThread"},{"id":45,"name":"Thread-8"}]}}
21:45:37.503 [debug] [Debug] to kernel: {"command":"scopes","arguments":{"frameId":5},"type":"request","seq":56}
21:45:37.503 [debug] [Debug] to kernel, mapped: {"command":"scopes","arguments":{"frameId":5},"type":"request","seq":56}
21:45:37.506 [debug] [Debug] response: {"seq":58,"type":"request","command":"startDebugging","arguments":{"request":"attach","configuration":{"type":"Python Kernel Debug Adapter","name":"Subprocess 20384","justMyCode":true,"__mode":1,"__cellIndex":3,"__notebookUri":"file:///Users/~/Documents/notebook.ipynb","__sessionId":"8fe949c3-b305-4b2d-9f6b-746ea95f9c1c","connect":{"host":"127.0.0.1","port":"52117"},"logToFile":true,"subProcessId":20384}}}
21:45:37.512 [info] Cannot start debugging. Already debugging this notebook document.

[DonJayamanne]

Sorry you are running into this issue.
Are you debugging a notebook cell or interactive window code?

Can you try to replicate this issue with a simple sample such as the following

print("Hello World");

def do_something(): 
    print("Inside")


print("Hello")
do_something()
print("Hello")

If you cannot, then its most likely some somethign in the Python code you are debugging thats causing this issue
Please can you share a minimal sample to repro this issue at my end (with few package dependencies or none at all).

[edervishaj]

Sorry for my late reply. I am debugging a notebook cell. I think it might be related to Python code that launches another subprocess. The following minimal sample throws the same error when I stop the debugger after some time (due to debugger freezing and nothing happening):

#9886 (comment)

I have exactly the same issue.

[DonJayamanne]

Let's close this as a duplicate