Colab demo fails about mmf

[apsdehal]

Hi,
Can you rerun the cell which threw this error? This error does happen sometime and when I rerun that cell it doesn't happen again.

[LanceNorskog]

Can you rerun the cell which threw this error? This error does happen sometime and when I rerun that cell it doesn't happen again.
Thanks! It made it past this error on the second run, but the second run failed on a stack trace I failed to capture: the core error was "weak ref set changed during iteration". It ran the third time.

Somewhere in Pythia or its constituent packages is some code that uses weak reference sets in an unreliable way. (Note: a Weak Reference collection can have elements removed at random, asynchronously, by the garbage collector.) It is possible that the library/application coder assumed that the implementor of the weak reference set would handle this asynchronous problem, but clearly the implementor did not.

Y'all do have some reliability problems, so I'm leaving this open, if only as a signpost to the unwary.

[apsdehal]

Thanks. I believe this issue happens only in colab demo. I will spend some time this week to figure out what is the issue.

[apsdehal]

The issue was occurring due to compatibility issues with CUDNN, CUDA and PyTorch versions. Colab recommends users to use their default PyTorch version instead of installing their own which fixes this issue. I have modify the colab file accordingly. Please comment back or reopen if this issue persists.

[LanceNorskog]

Cool!

[adeelahmad-co]

Go and change runtime to GPU then restart