xeus-python
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Published
20 hours ago •
jupyter-xeus
jupyter-xeus
Error Starting Kernel, unhandled error
Problem
After installing xeus-python jupyterlab, I ran into the following error screenshot.
The error log is as follows:
[E 2021-02-05 19:22:36.072 ServerApp] Failed to run command:
['C:/Users/parkn/anaconda3/Library/bin/xpython', '-f', 'C:\\Users\\parkn\\AppData\\Roaming\\jupyter\\runtime\\kernel-7cec6ee2-a205-48ed-b1bc-48e5542e8098.json']
PATH='C:\\WINDOWS\\system32;C:\\WINDOWS;C:\\WINDOWS\\System32\\Wbem;C:\\WINDOWS\\System32\\WindowsPowerShell\\v1.0\\;C:\\WINDOWS\\System32\\OpenSSH\\;C:\\Program Files\\Git\\cmd;C:\\Go\\bin;C:\\Program Files\\nodejs\\;C:\\Users\\parkn\\anaconda3;C:\\Users\\parkn\\anaconda3\\Library\\mingw-w64\\bin;C:\\Users\\parkn\\anaconda3\\Library\\usr\\bin;C:\\Users\\parkn\\anaconda3\\Library\\bin;C:\\Users\\parkn\\anaconda3\\Scripts;C:\\Ruby24-x64\\bin;C:\\Users\\parkn\\AppData\\Local\\Microsoft\\WindowsApps;C:\\Program Files\\JetBrains\\PyCharm Professional Edition with Anaconda plugin 2020.1.2\\bin;C:\\Program Files\\heroku\\bin;C:\\Users\\parkn\\go\\bin;C:\\Users\\parkn\\AppData\\Local\\atom\\bin;C:\\Users\\parkn\\AppData\\Local\\GitHubDesktop\\bin;C:\\Users\\parkn\\AppData\\Roaming\\npm'
with kwargs:
{'stdin': -1, 'stdout': None, 'stderr': None, 'cwd': 'C:\\Users\\parkn\\Desktop\\sandbank\\Github\\quant', 'close_fds': False}
[E 2021-02-05 19:22:36.074 ServerApp] Uncaught exception POST /api/sessions?1612549356054 (::1)
HTTPServerRequest(protocol='http', host='localhost:8888', method='POST', uri='/api/sessions?1612549356054', version='HTTP/1.1', remote_ip='::1')
Traceback (most recent call last):
File "C:\Users\parkn\anaconda3\lib\site-packages\tornado\web.py", line 1704, in _execute
result = await result
File "C:\Users\parkn\anaconda3\lib\site-packages\jupyter_server\services\sessions\handlers.py", line 67, in post
model = await sm.create_session(
File "C:\Users\parkn\anaconda3\lib\site-packages\jupyter_server\services\sessions\sessionmanager.py", line 92, in create_session
kernel_id = await self.start_kernel_for_session(session_id, path, name, type, kernel_name)
File "C:\Users\parkn\anaconda3\lib\site-packages\jupyter_server\services\sessions\sessionmanager.py", line 100, in start_kernel_for_session
kernel_id = await self.kernel_manager.start_kernel(path=kernel_path, kernel_name=kernel_name)
File "C:\Users\parkn\anaconda3\lib\site-packages\jupyter_server\services\kernels\kernelmanager.py", line 184, in start_kernel
kernel_id = await ensure_async(self.pinned_superclass.start_kernel(self, **kwargs))
File "C:\Users\parkn\anaconda3\lib\site-packages\jupyter_server\utils.py", line 178, in ensure_async
result = await obj
File "C:\Users\parkn\anaconda3\lib\site-packages\jupyter_client\multikernelmanager.py", line 468, in start_kernel
await km.start_kernel(**kwargs)
File "C:\Users\parkn\anaconda3\lib\site-packages\jupyter_client\manager.py", line 575, in start_kernel
self.kernel = await self._launch_kernel(kernel_cmd, **kw)
File "C:\Users\parkn\anaconda3\lib\site-packages\jupyter_client\manager.py", line 556, in _launch_kernel
res = launch_kernel(kernel_cmd, **kw)
File "C:\Users\parkn\anaconda3\lib\site-packages\jupyter_client\launcher.py", line 134, in launch_kernel
proc = Popen(cmd, **kwargs)
File "C:\Users\parkn\anaconda3\lib\subprocess.py", line 854, in __init__
self._execute_child(args, executable, preexec_fn, close_fds,
File "C:\Users\parkn\anaconda3\lib\subprocess.py", line 1307, in _execute_child
hp, ht, pid, tid = _winapi.CreateProcess(executable, args,
FileNotFoundError: [WinError 2] Cannot find the specified folder
[W 2021-02-05 19:22:36.081 ServerApp] Unhandled error
[E 2021-02-05 19:22:36.082 ServerApp] {
"Host": "localhost:8888",
"Connection": "keep-alive",
"Content-Length": "131",
"User-Agent": "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/83.0.4103.106 Whale/2.8.108.15 Safari/537.36",
"X-Xsrftoken": "2|f3162df8|55e925d42c0a1a6b2bc9437726b31b6b|1612009373",
"Authorization": "token 457fabbab70161af99e3ceddc4671ecc6a8c68a5ce6b45f6",
"Content-Type": "text/plain;charset=UTF-8",
"Accept": "*/*",
"Origin": "http://localhost:8888",
"Sec-Fetch-Site": "same-origin",
"Sec-Fetch-Mode": "cors",
"Sec-Fetch-Dest": "empty",
"Referer": "http://localhost:8888/lab/tree/Github/quant/Untitled1.ipynb",
"Accept-Encoding": "gzip, deflate, br",
"Accept-Language": "en-US,en;q=0.9,ko;q=0.8,ko-KR;q=0.7",
"Cookie": "username-localhost-8889=\"2|1:0|10:1611958704|23:username-localhost-8889|44:ZDJhN2ZkNTdlZmJkNGQwYzkyYzY1ZDU1Y2U4ZTM4M2M=|f68d9933c6428ecdb1b2b5b839075363de0ea6a6bab65955bd2a08b1a0d654f4\"; _xsrf=2|f3162df8|55e925d42c0a1a6b2bc9437726b31b6b|1612009373; username-localhost-8888=\"2|1:0|10:1612549355|23:username-localhost-8888|44:NzAzZThjNGFkYWFjNGJjYWI1ZmY5OGY0NTVjZjFkYWM=|1827fac71fb321893c2c8488d2403dba92dd1d03c3f39fbef5160c0f154fcc94\""
}
[E 2021-02-05 19:22:36.085 ServerApp] 500 POST /api/sessions?1612549356054 (::1) 18.95ms referer=http://localhost:8888/lab/tree/Github/quant/Untitled1.ipynb
How can I use xeus-python on my jupyter lab?
Hi, it looks like you may have a mix of packages from conda-forge and the default anaconda channel, and they don't play so well together.
I recommend either creating a new conda environment, or starting from a minimal conda installer like miniforge or mambaforge which will ensure that only packages from conda-forge are used.
I created a new conda environment as instructed in xeus-python github repository.
conda create -n xeus-python
conda activate xeus-python # Or `source activate xeus-python` for conda < 4.6
conda install xeus-python jupyterlab -c conda-forge
But the same error still pops out: " Error Starting Kernel, unhandled error". The error log is as follows:
[E 2021-02-05 23:17:54.693 ServerApp] Failed to run command:
['C:/Users/parkn/anaconda3/envs/xeus-python/Library/bin/xpython', '-f', 'C:\\Users\\parkn\\AppData\\Roaming\\jupyter\\runtime\\kernel-740a8fe1-5480-4ce7-b46b-ce6bc6f40fb6.json']
PATH='C:\\Users\\parkn\\anaconda3\\envs\\xeus-python;C:\\Users\\parkn\\anaconda3\\envs\\xeus-python\\Library\\mingw-w64\\bin;C:\\Users\\parkn\\anaconda3\\envs\\xeus-python\\Library\\usr\\bin;C:\\Users\\parkn\\anaconda3\\envs\\xeus-python\\Library\\bin;C:\\Users\\parkn\\anaconda3\\envs\\xeus-python\\Scripts;C:\\Users\\parkn\\anaconda3\\envs\\xeus-python\\bin;C:\\Users\\parkn\\anaconda3\\condabin;C:\\WINDOWS\\system32;C:\\WINDOWS;C:\\WINDOWS\\System32\\Wbem;C:\\WINDOWS\\System32\\WindowsPowerShell\\v1.0;C:\\WINDOWS\\System32\\OpenSSH;C:\\Program Files\\Git\\cmd;C:\\Go\\bin;C:\\Program Files\\nodejs;C:\\Users\\parkn\\anaconda3;C:\\Users\\parkn\\anaconda3\\Library\\mingw-w64\\bin;C:\\Users\\parkn\\anaconda3\\Library\\usr\\bin;C:\\Users\\parkn\\anaconda3\\Library\\bin;C:\\Users\\parkn\\anaconda3\\Scripts;C:\\Ruby24-x64\\bin;C:\\Users\\parkn\\AppData\\Local\\Microsoft\\WindowsApps;C:\\Program Files\\JetBrains\\PyCharm Professional Edition with Anaconda plugin 2020.1.2\\bin;C:\\Program Files\\heroku\\bin;C:\\Users\\parkn\\go\\bin;C:\\Users\\parkn\\AppData\\Local\\atom\\bin;C:\\Users\\parkn\\AppData\\Local\\GitHubDesktop\\bin;C:\\Users\\parkn\\AppData\\Roaming\\npm'
with kwargs:
{'stdin': -1, 'stdout': None, 'stderr': None, 'cwd': 'C:\\Users\\parkn\\Desktop\\sandbank\\Github\\quant', 'close_fds': False}
[E 2021-02-05 23:17:54.697 ServerApp] Uncaught exception POST /api/sessions?1612563474670 (::1)
HTTPServerRequest(protocol='http', host='localhost:8889', method='POST', uri='/api/sessions?1612563474670', version='HTTP/1.1', remote_ip='::1')
Traceback (most recent call last):
File "C:\Users\parkn\anaconda3\envs\xeus-python\lib\site-packages\tornado\web.py", line 1704, in _execute
result = await result
File "C:\Users\parkn\anaconda3\envs\xeus-python\lib\site-packages\jupyter_server\services\sessions\handlers.py", line 67, in post
model = await sm.create_session(
File "C:\Users\parkn\anaconda3\envs\xeus-python\lib\site-packages\jupyter_server\services\sessions\sessionmanager.py", line 92, in create_session
kernel_id = await self.start_kernel_for_session(session_id, path, name, type, kernel_name)
File "C:\Users\parkn\anaconda3\envs\xeus-python\lib\site-packages\jupyter_server\services\sessions\sessionmanager.py", line 100, in start_kernel_for_session
kernel_id = await self.kernel_manager.start_kernel(path=kernel_path, kernel_name=kernel_name)
File "C:\Users\parkn\anaconda3\envs\xeus-python\lib\site-packages\jupyter_server\services\kernels\kernelmanager.py", line 184, in start_kernel
kernel_id = await ensure_async(self.pinned_superclass.start_kernel(self, **kwargs))
File "C:\Users\parkn\anaconda3\envs\xeus-python\lib\site-packages\jupyter_server\utils.py", line 178, in ensure_async
result = await obj
File "C:\Users\parkn\anaconda3\envs\xeus-python\lib\site-packages\jupyter_client\multikernelmanager.py", line 468, in start_kernel
await km.start_kernel(**kwargs)
File "C:\Users\parkn\anaconda3\envs\xeus-python\lib\site-packages\jupyter_client\manager.py", line 575, in start_kernel
self.kernel = await self._launch_kernel(kernel_cmd, **kw)
File "C:\Users\parkn\anaconda3\envs\xeus-python\lib\site-packages\jupyter_client\manager.py", line 556, in _launch_kernel
res = launch_kernel(kernel_cmd, **kw)
File "C:\Users\parkn\anaconda3\envs\xeus-python\lib\site-packages\jupyter_client\launcher.py", line 134, in launch_kernel
proc = Popen(cmd, **kwargs)
File "C:\Users\parkn\anaconda3\envs\xeus-python\lib\subprocess.py", line 947, in __init__
self._execute_child(args, executable, preexec_fn, close_fds,
File "C:\Users\parkn\anaconda3\envs\xeus-python\lib\subprocess.py", line 1416, in _execute_child
hp, ht, pid, tid = _winapi.CreateProcess(executable, args,
FileNotFoundError: [WinError 2] 지정된 파일을 찾을 수 없습니다
[W 2021-02-05 23:17:54.703 ServerApp] Unhandled error
[E 2021-02-05 23:17:54.704 ServerApp] {
"Host": "localhost:8889",
"Connection": "keep-alive",
"Content-Length": "148",
"User-Agent": "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/83.0.4103.106 Whale/2.8.108.15 Safari/537.36",
"X-Xsrftoken": "2|f3162df8|55e925d42c0a1a6b2bc9437726b31b6b|1612009373",
"Authorization": "token 5d9a39706a384c2e86944b91118d236f039c69f83c15f259",
"Content-Type": "text/plain;charset=UTF-8",
"Accept": "*/*",
"Origin": "http://localhost:8889",
"Sec-Fetch-Site": "same-origin",
"Sec-Fetch-Mode": "cors",
"Sec-Fetch-Dest": "empty",
"Referer": "http://localhost:8889/lab/tree/Desktop/sandbank/Github/quant",
"Accept-Encoding": "gzip, deflate, br",
"Accept-Language": "en-US,en;q=0.9,ko;q=0.8,ko-KR;q=0.7",
"Cookie": "_xsrf=2|f3162df8|55e925d42c0a1a6b2bc9437726b31b6b|1612009373; username-localhost-8888=\"2|1:0|10:1612563315|23:username-localhost-8888|44:ZTdmMmRmYTZjMDg1NDc3Y2EyZjA3ZGI2OGU0ZjAwZTc=|7ffb238ca81e623194fed1f8efa85ffc3191c54cba533dfb9bd3eb9e3caa8e2f\"; username-localhost-8889=\"2|1:0|10:1612563467|23:username-localhost-8889|44:ZGJkMWUzZjMyZDViNGM1MGIwZGM1ZWJkNTJhMGFiNzM=|d618d3ee673305a2fba5faaad41190c6071c7ea8ef7b06c9d711a1d6b546d788\""
}
[E 2021-02-05 23:17:54.707 ServerApp] 500 POST /api/sessions?1612563474670 (::1) 28.92ms referer=http://localhost:8889/lab/tree/Desktop/sandbank/Github/quant
Thank you for reporting!
Could you please report the output of conda list in your environment?
Thank you for your kind comments.
I have executed the following commands.
conda activate xeus-python
conda list
The packages installed in an xeus-python environment are as follows.
# packages in environment at C:\Users\parkn\anaconda3\envs\xeus-python:
#
# Name Version Build Channel
anyio 2.0.2 py39hcbf5309_4 conda-forge
argon2-cffi 20.1.0 py39hb82d6ee_2 conda-forge
async_generator 1.10 py_0 conda-forge
attrs 20.3.0 pyhd3deb0d_0 conda-forge
babel 2.9.0 pyhd3deb0d_0 conda-forge
backcall 0.2.0 pyh9f0ad1d_0 conda-forge
backports 1.0 py_2 conda-forge
backports.functools_lru_cache 1.6.1 py_0 conda-forge
bleach 3.3.0 pyh44b312d_0 conda-forge
brotlipy 0.7.0 py39hb82d6ee_1001 conda-forge
ca-certificates 2020.12.5 h5b45459_0 conda-forge
certifi 2020.12.5 py39hcbf5309_1 conda-forge
cffi 1.14.4 py39h0878f49_1 conda-forge
chardet 4.0.0 py39hcbf5309_1 conda-forge
colorama 0.4.4 pyh9f0ad1d_0 conda-forge
cryptography 3.3.1 py39h0878f49_1 conda-forge
debugpy 1.2.1 py39h415ef7b_1 conda-forge
decorator 4.4.2 py_0 conda-forge
defusedxml 0.6.0 py_0 conda-forge
entrypoints 0.3 pyhd8ed1ab_1003 conda-forge
idna 2.10 pyh9f0ad1d_0 conda-forge
importlib-metadata 3.4.0 py39hcbf5309_0 conda-forge
importlib_metadata 3.4.0 hd8ed1ab_0 conda-forge
ipykernel 5.1.0 pyh24bf2e0_0 conda-forge
ipython 7.20.0 py39h832f523_2 conda-forge
ipython_genutils 0.2.0 py_1 conda-forge
jedi 0.18.0 py39hcbf5309_2 conda-forge
jinja2 2.11.3 pyh44b312d_0 conda-forge
json5 0.9.5 pyh9f0ad1d_0 conda-forge
jsonschema 3.2.0 py_2 conda-forge
jupyter_client 6.1.11 pyhd8ed1ab_1 conda-forge
jupyter_core 4.7.1 py39hcbf5309_0 conda-forge
jupyter_server 1.3.0 py39hcbf5309_0 conda-forge
jupyterlab 3.0.7 pyhd8ed1ab_0 conda-forge
jupyterlab_pygments 0.1.2 pyh9f0ad1d_0 conda-forge
jupyterlab_server 2.2.0 pyhd8ed1ab_0 conda-forge
libsodium 1.0.18 h8d14728_1 conda-forge
m2w64-gcc-libgfortran 5.3.0 6 conda-forge
m2w64-gcc-libs 5.3.0 7 conda-forge
m2w64-gcc-libs-core 5.3.0 7 conda-forge
m2w64-gmp 6.1.0 2 conda-forge
m2w64-libwinpthread-git 5.0.0.4634.697f757 2 conda-forge
markupsafe 1.1.1 py39hb82d6ee_3 conda-forge
mistune 0.8.4 py39hb82d6ee_1003 conda-forge
msys2-conda-epoch 20160418 1 conda-forge
nbclassic 0.2.6 pyhd8ed1ab_0 conda-forge
nbclient 0.5.1 py_0 conda-forge
nbconvert 6.0.7 py39hcbf5309_3 conda-forge
nbformat 5.1.2 pyhd8ed1ab_1 conda-forge
nest-asyncio 1.4.3 pyhd8ed1ab_0 conda-forge
notebook 6.2.0 py39hcbf5309_0 conda-forge
openssl 1.1.1i h8ffe710_0 conda-forge
packaging 20.9 pyh44b312d_0 conda-forge
pandoc 2.11.4 h8ffe710_0 conda-forge
pandocfilters 1.4.2 py_1 conda-forge
parso 0.8.1 pyhd8ed1ab_0 conda-forge
pickleshare 0.7.5 py_1003 conda-forge
pip 21.0.1 pyhd8ed1ab_0 conda-forge
prometheus_client 0.9.0 pyhd3deb0d_0 conda-forge
prompt-toolkit 3.0.14 pyha770c72_0 conda-forge
pycparser 2.20 pyh9f0ad1d_2 conda-forge
pygments 2.7.4 pyhd8ed1ab_0 conda-forge
pyopenssl 20.0.1 pyhd8ed1ab_0 conda-forge
pyparsing 2.4.7 pyh9f0ad1d_0 conda-forge
pyrsistent 0.17.3 py39hb82d6ee_2 conda-forge
pysocks 1.7.1 py39hcbf5309_3 conda-forge
python 3.9.1 h7840368_5_cpython conda-forge
python-dateutil 2.8.1 py_0 conda-forge
python_abi 3.9 1_cp39 conda-forge
pytz 2021.1 pyhd8ed1ab_0 conda-forge
pywin32 300 py39hb82d6ee_0 conda-forge
pywinpty 0.5.7 py39hde42818_1 conda-forge
pyzmq 22.0.1 py39h6e08c89_0 conda-forge
requests 2.25.1 pyhd3deb0d_0 conda-forge
send2trash 1.5.0 py_0 conda-forge
setuptools 49.6.0 py39hcbf5309_3 conda-forge
six 1.15.0 pyh9f0ad1d_0 conda-forge
sniffio 1.2.0 py39hcbf5309_1 conda-forge
sqlite 3.34.0 h8ffe710_0 conda-forge
terminado 0.9.2 py39hcbf5309_0 conda-forge
testpath 0.4.4 py_0 conda-forge
tornado 6.1 py39hb82d6ee_1 conda-forge
traitlets 5.0.5 py_0 conda-forge
tzdata 2021a he74cb21_0 conda-forge
urllib3 1.26.3 pyhd8ed1ab_0 conda-forge
vc 14.2 hb210afc_2 conda-forge
vs2015_runtime 14.28.29325 h5e1d092_0 conda-forge
wcwidth 0.2.5 pyh9f0ad1d_2 conda-forge
webencodings 0.5.1 py_1 conda-forge
wheel 0.36.2 pyhd3deb0d_0 conda-forge
win_inet_pton 1.1.0 py39hcbf5309_2 conda-forge
wincertstore 0.2 py39hcbf5309_1006 conda-forge
winpty 0.4.3 4 conda-forge
xeus 1.0.0 h50e1b43_0 conda-forge
xeus-python 0.10.2 py39h82436b1_0 conda-forge
zeromq 4.3.3 h0e60522_3 conda-forge
zipp 3.4.0 py_0 conda-forge
I solved this by installing the spec again:
Rscript -e "IRkernel::installspec()"
