POST /api/kernels/{kernel_id}/interrupt 500 Response. "Kernel is in a pending state. Cannot interrupt."

[a3626a]

Description

During kernel resart, interrupting causes server side 500 error and client side Error: Unhandled Error

https://user-images.githubusercontent.com/4434752/227858715-2ee65575-3a25-4bf2-9eae-3f5c3ab17247.mp4

Binder for the video: https://mybinder.org/v2/gh/binder-project/binder/HEAD (well, it is easily reproducable widly)

Chrome console log:

react_devtools_backend.js:2655 Traceback (most recent call last):
  File "/home/leechanghwan/miniconda3/envs/jl3-ext/lib/python3.11/site-packages/tornado/web.py", line 1713, in _execute
    result = await result
             ^^^^^^^^^^^^
  File "/home/leechanghwan/miniconda3/envs/jl3-ext/lib/python3.11/site-packages/jupyter_server/services/kernels/handlers.py", line 94, in post
    await ensure_async(km.interrupt_kernel(kernel_id))
                       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/leechanghwan/miniconda3/envs/jl3-ext/lib/python3.11/site-packages/jupyter_client/multikernelmanager.py", line 337, in interrupt_kernel
    raise RuntimeError("Kernel is in a pending state. Cannot interrupt.")
RuntimeError: Kernel is in a pending state. Cannot interrupt.

jlab_core.6144df8e3fe03e33f880.js?v=6144df8e3fe03e33f880:2 Uncaught (in promise) Error: Unhandled error
    at r.create (jlab_core.6144df8e3fe03e33f880.js?v=6144df8e3fe03e33f880:2:1029239)
    at async Object.c [as interruptKernel] (jlab_core.6144df8e3fe03e33f880.js?v=6144df8e3fe03e33f880:2:1017461)

Server responce:

{
  "message": "Unhandled error", 
  "reason": null,
  "traceback": "Traceback (most recent call last):\n  File \"/home/leechanghwan/miniconda3/envs/jl3-ext/lib/python3.11/site-packages/tornado/web.py\", line 1713, in _execute\n    result = await result\n             ^^^^^^^^^^^^\n  File \"/home/leechanghwan/miniconda3/envs/jl3-ext/lib/python3.11/site-packages/jupyter_server/services/kernels/handlers.py\", line 94, in post\n    await ensure_async(km.interrupt_kernel(kernel_id))\n                       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^\n  File \"/home/leechanghwan/miniconda3/envs/jl3-ext/lib/python3.11/site-packages/jupyter_client/multikernelmanager.py\", line 337, in interrupt_kernel\n    raise RuntimeError(\"Kernel is in a pending state. Cannot interrupt.\")\nRuntimeError: Kernel is in a pending state. Cannot interrupt.\n"
}

Reproduce

Check the video. Tips:

• click restart button and pop the dialog.
• move user mouse pointer to 'stop' button
• Press 'Enter' and click very fast and frequently

Expected behavior

Server might respond with error, but not 500. 4XX and with proper error message.

Context

Binder provided.

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[darcsoel]

Which version of Python and Jupyter you are using? Is it reproducible with lower version?