_error_if_any_worker_fails() error for dataloader


When use dataloader for my custom implemented dataset, I met _error_if_any_worker_fails() error. What is the reason to cause this error? Is there good python debug tool to debug this issue? Thanks


This means that one of the process used to load data crashed.
If you run the dataloader with 0 process (so no worker), it should raise the error directly in the main process.

When I set worker=0, there is no crash

there is an error message printed togther and you should look at that

It seems the error messages are different from test to test.