Installation Issue with Micromamba

[Hind-M]

Reported in micromamba-releases:

Greetings,

I am trying to install ray-default, ray-train, and ray-tune in a micromamba envrionment. I am able to install other packages (e.g., numpy, pandas, etc.) in this environment. When I try to install ray-default using the following command:

micromamba install "ray-default" -c conda-forge

I get the following error:

warning libmamba Invalid package cache, file ‘C:\Users\hseely\micromamba\pkgs\ray-core-2.40.0-py39h702a4a0_1\Lib\site-packages\ray\core\src\ray\gcs\gcs_server.exe’ is missing

error libmamba Cannot find a valid extracted directory cache for ‘ray-core-2.40.0-py39h702a4a0_1.conda’
critical libmamba Package cache error.

I have tried creating new environments, installing different versions of ray, cleaning the micromamba cache, and re-installing micromamba. Any advice on how to resolve this?

Thanks,

Harry

[Hind-M]

Hey @harryseely!
Thanks for reporting this. Can you please specify the micromamba version you're using?

[harryseely]

Hi @Hind-M here are some details about my setup:

Windows 11

Micromamba=2.0.5

I'm pretty sure the issues also relates to miniconda since I also cannot install Ray in a miniconda env. I thought that unless specified, micromamba operates independently of miniconda?

[harryseely]

Unsurprisingly, the fix was to completely delete all conda related directories on my C drive and then re-install micromamba.

[jjerphan]

We recommend using miniforge for the installation rather than miniconda (which is not distributed by conda-forge).

Closing as solved as indicated in mamba-org/micromamba-releases#73 (comment). Feel free to comment or reopen this issue if you still have a problem.