Add a line about socket hopefully will avoid port conflicts

map2map/train.py

@@ -398,6 +398,7 @@ def dist_init(rank, args):
         addr = socket.gethostname()
 
         with socket.socket() as s:
+            s.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
             s.bind((addr, 0))
             _, port = s.getsockname()