Hello!

I am currently trying to use Pytorch Lightning inside Databricks and I am currently using a cluster with 2 gpus. Whenever I try to train my Transformer model with 1 gpu in DP strategy everything works fine, but when I try to use both the 2 gpus with a DDP strategy I get the following error:

MisconfigurationException: `Trainer(strategy='ddp_spawn')` or `Trainer(accelerator='ddp_spawn')` is not compatible with an interactive environment. Run your code as a script, or choose one of the compatible strategies: Trainer(strategy=None|dp|tpu_spawn). In case you are spawning processes yourself, make sure to include the Trainer creation inside the worker function.