trian error

[DUhaixia]

one gpu training，run trian.py meet this error

``
Traceback (most recent call last):
File "D:/rhnet-daima/res-loglikelihood-regression-master/res-loglikelihood-regression-master/scripts/train.py", line 172, in
main()
File "D:/rhnet-daima/res-loglikelihood-regression-master/res-loglikelihood-regression-master/scripts/train.py", line 45, in main
mp.spawn(main_worker, nprocs=ngpus_per_node, args=(opt, cfg))
File "D:\anaconda3\envs\PyTorch_YOLOv4-master\lib\site-packages\torch\multiprocessing\spawn.py", line 199, in spawn
return start_processes(fn, args, nprocs, join, daemon, start_method='spawn')
File "D:\anaconda3\envs\PyTorch_YOLOv4-master\lib\site-packages\torch\multiprocessing\spawn.py", line 157, in start_processes
while not context.join():
File "D:\anaconda3\envs\PyTorch_YOLOv4-master\lib\site-packages\torch\multiprocessing\spawn.py", line 118, in join
raise Exception(msg)
Exception:

-- Process 0 terminated with the following error:
Traceback (most recent call last):
File "D:\anaconda3\envs\PyTorch_YOLOv4-master\lib\site-packages\torch\multiprocessing\spawn.py", line 19, in _wrap
fn(i, *args)
File "D:\rhnet-daima\res-loglikelihood-regression-master\res-loglikelihood-regression-master\scripts\train.py", line 55, in main_worker
init_dist(opt)
File "D:\rhnet-daima\res-loglikelihood-regression-master\res-loglikelihood-regression-master\rlepose\utils\env.py", line 24, in init_dist
world_size=opt.world_size, rank=opt.rank)
File "D:\anaconda3\envs\PyTorch_YOLOv4-master\lib\site-packages\torch\distributed\distributed_c10d.py", line 434, in init_process_group
init_method, rank, world_size, timeout=timeout
File "D:\anaconda3\envs\PyTorch_YOLOv4-master\lib\site-packages\torch\distributed\rendezvous.py", line 82, in rendezvous
raise RuntimeError("No rendezvous handler for {}://".format(result.scheme))
RuntimeError: No rendezvous handler for tcp://

[Jeff-sjtu]

Hi @DUhaixia, you should change WORLD_SIZE in the config file to 1 when you use one GPU for training.