trainer.test not working in ddp
🐛 Bug
Testing in ddp is not working in the latest master.
To Reproduce
I am using the gpu_template example from basic_examples in the repo : "python gpu_template.py --gpus 2 --distributed_backend ddp", where, instead of trainer.fit(model), I am using trainer.test(model).
I am getting "RuntimeError: connect() timed out".
Environment

PyTorch Version 1.3.1:
Ubuntu 18.04