Kernel error in Jupyter notebook
Good evening. I can't run the notebook because of a "kernel error". I'll paste here the message. Can you help me? Thank you
Traceback (most recent call last):
File "C:\Users\Alessandro\anaconda3\envs\py3-TF2.0\lib\site-packages\tornado\web.py", line 1713, in _execute
result = await result
File "C:\Users\Alessandro\anaconda3\envs\py3-TF2.0\lib\asyncio\tasks.py", line 318, in __wakeup
future.result()
File "C:\Users\Alessandro\anaconda3\envs\py3-TF2.0\lib\site-packages\tornado\gen.py", line 776, in run
yielded = self.gen.throw(*exc_info) # type: ignore
File "C:\Users\Alessandro\anaconda3\envs\py3-TF2.0\lib\site-packages\notebook\services\sessions\handlers.py", line 77, in post
type=mtype))
File "C:\Users\Alessandro\anaconda3\envs\py3-TF2.0\lib\site-packages\tornado\gen.py", line 769, in run
value = future.result()
File "C:\Users\Alessandro\anaconda3\envs\py3-TF2.0\lib\site-packages\tornado\gen.py", line 776, in run
yielded = self.gen.throw(*exc_info) # type: ignore
File "C:\Users\Alessandro\anaconda3\envs\py3-TF2.0\lib\site-packages\notebook\services\sessions\sessionmanager.py", line 98, in create_session
kernel_id = yield self.start_kernel_for_session(session_id, path, name, type, kernel_name)
File "C:\Users\Alessandro\anaconda3\envs\py3-TF2.0\lib\site-packages\tornado\gen.py", line 769, in run
value = future.result()
File "C:\Users\Alessandro\anaconda3\envs\py3-TF2.0\lib\site-packages\tornado\gen.py", line 776, in run
yielded = self.gen.throw(*exc_info) # type: ignore
File "C:\Users\Alessandro\anaconda3\envs\py3-TF2.0\lib\site-packages\notebook\services\sessions\sessionmanager.py", line 111, in start_kernel_for_session
self.kernel_manager.start_kernel(path=kernel_path, kernel_name=kernel_name)
File "C:\Users\Alessandro\anaconda3\envs\py3-TF2.0\lib\site-packages\tornado\gen.py", line 769, in run
value = future.result()
File "C:\Users\Alessandro\anaconda3\envs\py3-TF2.0\lib\asyncio\futures.py", line 181, in result
raise self._exception
File "C:\Users\Alessandro\anaconda3\envs\py3-TF2.0\lib\asyncio\tasks.py", line 249, in __step
result = coro.send(None)
File "C:\Users\Alessandro\anaconda3\envs\py3-TF2.0\lib\site-packages\notebook\services\kernels\kernelmanager.py", line 176, in start_kernel
kernel_id = await maybe_future(self.pinned_superclass.start_kernel(self, **kwargs))
File "C:\Users\Alessandro\anaconda3\envs\py3-TF2.0\lib\site-packages\jupyter_client\utils.py", line 30, in wrapped
raise e
File "C:\Users\Alessandro\anaconda3\envs\py3-TF2.0\lib\site-packages\jupyter_client\utils.py", line 27, in wrapped
return loop.run_until_complete(future)
File "C:\Users\Alessandro\anaconda3\envs\py3-TF2.0\lib\site-packages\nest_asyncio.py", line 89, in run_until_complete
return f.result()
File "C:\Users\Alessandro\anaconda3\envs\py3-TF2.0\lib\asyncio\futures.py", line 181, in result
raise self._exception
File "C:\Users\Alessandro\anaconda3\envs\py3-TF2.0\lib\asyncio\tasks.py", line 249, in __step
result = coro.send(None)
File "C:\Users\Alessandro\anaconda3\envs\py3-TF2.0\lib\site-packages\jupyter_client\multikernelmanager.py", line 214, in _async_start_kernel
starter = ensure_async(km.start_kernel(**kwargs))
File "C:\Users\Alessandro\anaconda3\envs\py3-TF2.0\lib\site-packages\jupyter_client\utils.py", line 30, in wrapped
raise e
File "C:\Users\Alessandro\anaconda3\envs\py3-TF2.0\lib\site-packages\jupyter_client\utils.py", line 27, in wrapped
return loop.run_until_complete(future)
File "C:\Users\Alessandro\anaconda3\envs\py3-TF2.0\lib\site-packages\nest_asyncio.py", line 89, in run_until_complete
return f.result()
File "C:\Users\Alessandro\anaconda3\envs\py3-TF2.0\lib\asyncio\futures.py", line 181, in result
raise self._exception
File "C:\Users\Alessandro\anaconda3\envs\py3-TF2.0\lib\asyncio\tasks.py", line 249, in __step
result = coro.send(None)
File "C:\Users\Alessandro\anaconda3\envs\py3-TF2.0\lib\site-packages\jupyter_client\manager.py", line 83, in wrapper
raise e
File "C:\Users\Alessandro\anaconda3\envs\py3-TF2.0\lib\site-packages\jupyter_client\manager.py", line 75, in wrapper
out = await method(self, *args, **kwargs)
File "C:\Users\Alessandro\anaconda3\envs\py3-TF2.0\lib\site-packages\jupyter_client\manager.py", line 389, in _async_start_kernel
await ensure_async(self._launch_kernel(kernel_cmd, **kw))
File "C:\Users\Alessandro\anaconda3\envs\py3-TF2.0\lib\site-packages\jupyter_client\utils.py", line 30, in wrapped
raise e
File "C:\Users\Alessandro\anaconda3\envs\py3-TF2.0\lib\site-packages\jupyter_client\utils.py", line 27, in wrapped
return loop.run_until_complete(future)
File "C:\Users\Alessandro\anaconda3\envs\py3-TF2.0\lib\site-packages\nest_asyncio.py", line 89, in run_until_complete
return f.result()
File "C:\Users\Alessandro\anaconda3\envs\py3-TF2.0\lib\asyncio\futures.py", line 181, in result
raise self._exception
File "C:\Users\Alessandro\anaconda3\envs\py3-TF2.0\lib\asyncio\tasks.py", line 249, in __step
result = coro.send(None)
File "C:\Users\Alessandro\anaconda3\envs\py3-TF2.0\lib\site-packages\jupyter_client\manager.py", line 307, in _async_launch_kernel
connection_info = await self.provisioner.launch_kernel(kernel_cmd, **kw)
File "C:\Users\Alessandro\anaconda3\envs\py3-TF2.0\lib\site-packages\jupyter_client\provisioning\local_provisioner.py", line 204, in launch_kernel
self.process = launch_kernel(cmd, **scrubbed_kwargs)
File "C:\Users\Alessandro\anaconda3\envs\py3-TF2.0\lib\site-packages\jupyter_client\launcher.py", line 170, in launch_kernel
raise ex
File "C:\Users\Alessandro\anaconda3\envs\py3-TF2.0\lib\site-packages\jupyter_client\launcher.py", line 158, in launch_kernel
proc = Popen(cmd, **kwargs)
File "C:\Users\Alessandro\anaconda3\envs\py3-TF2.0\lib\subprocess.py", line 800, in __init__
restore_signals, start_new_session)
File "C:\Users\Alessandro\anaconda3\envs\py3-TF2.0\lib\subprocess.py", line 1207, in _execute_child
startupinfo)
NotADirectoryError: [WinError 267] Nome di directory non valido
Hi Alessandro,
When does this error appear, what portion of the code are you running?
Just to be sure, did you install the required packages?
Best,
Nikola, 365 Team
Good morning. The error appears just when I open the notebook. Usually I have a different error ("not connected") that I already reported several times in the Q&A section of other courses, but nobody has ever helped me. This time I have this:
When I click on "Kernel error", it gives me the message I pasted before.
Yes, I have installed the required packages. Thanks
Hi Alessandro,
I have no concrete solution to this problem, but to me it looks like some kind of problem with your environment.
Maybe it wasn't installed and configured properly, or it is not selected as the environment in the notebook.
So, try to reinstantiate a different environment and check for related issues.
Here's an article I found on the internet about kernel errors, you can check it out:
https://towardsdatascience.com/how-to-fix-kernel-error-in-jupyter-notebook-81619e195703#:~:text=A%20kernel%20error%20occurs%20basically,a%20specific%20version%20of%20Python
Hope this was useful in some way, even though I couldn't help you with the problem directly!
Best,
Nikola, 365 Team
Maybe I have already tried with the procedure in that link, but I'll try again. Thank you
Good morning. I have tried it, but it gives me an error when I write "conda install ipykernel". I post the error here:
Collecting package metadata (current_repodata.json): failed
CondaSSLError: Encountered an SSL error. Most likely a certificate verification issue.
Exception: HTTPSConnectionPool(host='repo.anaconda.com', port=443): Max retries exceeded with url: /pkgs/main/win-64/current_repodata.json (Caused by SSLError("Can't connect to HTTPS URL because the SSL module is not available."))
I think I have solved the issue by myself (even if I already tried this solution in the past and it didn't work): the path name of the notebook I was using was too long, so I copied and pasted it in a shorter path and now the error has disappeared. In general, it could also be useful for someone with a "kernel error" to watch this video: https://www.youtube.com/watch?v=m0TLwkje6co&ab_channel=JonathanSoma
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