Training stuck at 0% after few epochs while training with DDP
🐛 Bug
I recently updated to pytorch_lightning 1.1.7 and noticed that after a few epochs of training, the training % is stuck at 0% and never progresses. When I switched back to 1.1.4, this strange behavior does not occur. I do not know the root cause of this issue.

PyTorch Version (e.g., 1.0): 1.1.7
OS (e.g., Linux): Linux, U18
How you installed PyTorch (conda, pip, source): pip install
Build command you used (if compiling from source):
Python version: 3.6
CUDA/cuDNN version: 10.0
GPU models and configuration: RTX 2080 x3
Any other relevant information: