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"Parent poll failed" warning

See original GitHub issue

Description

What steps will reproduce the problem?

Start Spyder
Do something in the IPython console (probably not necessary)
Restart kernel

The resulting message is the “parent poll failed” message"

parentpoller.py:116: UserWarning: Parent poll failed.  If the frontend dies,
                the kernel may be left running.  Please let us know
                about your system (bitness, Python, etc.) at
                ipython-dev@scipy.org
  ipython-dev@scipy.org""")

This may be related to some of the discussion in #7842, but I seem to only see this when I restart a kernel now.

Versions

Spyder version: 4.0.0.dev0
Python version: 3.7.0
Qt version: 5.9.6
PyQt5 version: 5.9.2
Operating System: Windows 10

Dependencies

pygments >=2.0    :  2.2.0 (OK)
sphinx >=0.6.6    :  2.0.0 (OK)
pyls >=0.19.0     :  0+unknown (OK)
nbconvert >=4.0   :  5.4.0 (OK)
pandas >=0.13.1   :  0.23.4 (OK)
numpy >=1.7       :  1.15.2 (OK)
sympy >=0.7.3     :  1.3 (OK)
cython >=0.21     :  0.28.5 (OK)
qtconsole >=4.2.0 :  4.4.2 (OK)
IPython >=4.0     :  7.0.1 (OK)
matplotlib >=2.0.0:  3.0.1 (OK)
pylint >=0.25     :  2.1.1 (OK)

Issue Analytics

State:
Created 5 years ago
Comments:34 (22 by maintainers)

Top GitHub Comments

1reaction

ccordoba12commented, Dec 13, 2018

@NdaAzr, please update spyder-kernels to 0.3.0. That version fixes your error.

1reaction

CAM-Gerlachcommented, Dec 10, 2018

@NdaAzr Its just a warning, so there’s nothing to really “solve” unless you see specific symptoms. It seems likely to be an issue with ipykernel or jupyter_client rather than anything with Spyder, given the warning comes from the former package. @minrk any ideas?