fixed nccl init

pytorch_lightning/models/trainer.py

@@ -385,6 +385,10 @@ class Trainer(TrainerIO):
             port = 12910
             os.environ['MASTER_PORT'] = f'{port}'
 
+        print('-'*100)
+        print(f'PORT: {port}')
+        print('-'*100)
+
         sleep(self.proc_rank * 2)
 
         root_node = os.environ['SLURM_NODELIST'].split(' ')[0]