Sometimes when running Python nodes at the same time it can happen that a node just fails with “stopped executing”. I wasn’t able to pin-point the exact issue but I think it’s when 2 nodes at the same time are loading / outputting data, then one of the fails.
Similar issue occurs with Python node (Python 3.6) that is inside of a loop. The node spontaneously gets canceled.
Systems: Windows 8.1 Enterprise
KNIME Version: 3.6.0
Console details, at point of error:
ERROR PythonKernel C:\Program Files\Python36\lib\site-packages\sklearn\utils\validation.py:578: DataConversionWarning: A column-vector y was passed when a 1d array was expected. Please change the shape of y to (n_samples, ), for example using ravel().
DEBUG PythonKernel y = column_or_1d(y, warn=True)
WARN Python Script (1⇒1) 0:3100:3219:3119 Execution canceled