Thomas Moreau

I agree that the warning is unclear and we could actually update it. The purpose of the warning is to help people detect that the caching is not free. It...

Actually there is two part here: - The time taken by the hashing (in call `_get_output_identifiers`). If this is slower than the function call, it makes no sense to use...

This is something that has happened with `loky` on appveyor (our closest access to window) but I think it was only due to the load of the machine. From time...

@csbrown This error should only be displayed when one of the worker in the `ProcessPoolExecutor` died in an unexpected way. This means that the worker got killed by something that...

This is something related to #896. The `except` seems to be aimed at avoiding concurrent race in creating folders. I am not sure it was originally to avoid pickling issues....

I think that if it is possible to add support with optional dependency/extension, this would be a good idea. The output in verbose joblib would be improved with it. But...

Not sure I understand the issue here. Is the problem with the memory or with a job that does not return? Could you provide a clearer description of the problem?...

Usually not a good thing that it hangs.. :sweat_smile: Happy to help debug this but I will need a bit more info to get what is going on. Could you...

Your issue seems to be with using the `multiprocessing` backend, which is known to cause some bug with C-level parallelism that seems to be used in `opencv`. To avoid such...

Thanks for the report and the nice reproducer! :) I can confirm that I have the same error. It seems that the statement that create this hang is [joblib/__init__.py:l.139](https://github.com/joblib/joblib/blob/master/joblib/__init__.py#L139) where...