Pip installation stuck in infinite loop if unresolvable conflicts in dependencies

Question

Pip installation is stuck in an infinite loop if there are unresolvable conflicts in dependencies. To reproduce, pip==20.3.0 and:

pip install pyarrow==2.0.0 azureml-defaults==1.18.0

Answer 1

Workarounds:

Local environment: Downgrade pip to < 20.3

Conda environment created from yaml: This will be seen only if conda-forge is highest priority channel, anaconda channel doesn't have pip 20.3 (as of now). To mitigate the issue please explicitly specify pip<20.3 (!=20.3 or =20.2.4 pin to other version) as a conda dependency in the conda specification file

AzureML experimentation: Follow the case above to make sure pinned pip resulted as a conda dependency in the environment object, either from yml file or programmatically