fix geo ut (#33441)

Change-Id: I4e09e7710f6693bff5388983270781a4ef70519e

python/paddle/fluid/tests/unittests/test_communicator_geo.py

@@ -28,6 +28,8 @@
 import paddle.distributed.fleet.base.role_maker as role_maker
 import paddle.distributed.fleet as fleet
 
+from paddle.distributed.utils import find_free_ports
+
 paddle.enable_static()
 
 
@@ -101,12 +103,9 @@ def run_ut(self):
 
         os.environ["PADDLE_PSERVER_NUMS"] = "1"
         os.environ["PADDLE_TRAINERS_NUM"] = "1"
-        os.environ["POD_IP"] = "127.0.0.1"
-        os.environ["PADDLE_PORT"] = "36001"
         os.environ["PADDLE_TRAINER_ID"] = "0"
         os.environ["PADDLE_TRAINERS_NUM"] = "1"
-        os.environ["PADDLE_PSERVERS_IP_PORT_LIST"] = \
-            "127.0.0.1:36001"
+        os.environ["POD_IP"] = "127.0.0.1"
 
         role = role_maker.PaddleCloudRoleMaker()
 
@@ -150,8 +149,6 @@ def runTest(self):
         pass
 
 os.environ["TRAINING_ROLE"] = "PSERVER"
-os.environ["http_proxy"] = ""
-os.environ["https_proxy"] = ""
 
 half_run_server = RunServer()
 half_run_server.run_ut()
@@ -160,9 +157,12 @@ def runTest(self):
         server_file = "run_server_for_communicator_geo.py"
         with open(server_file, "w") as wb:
             wb.write(run_server_cmd)
+
+        port = find_free_ports(1).pop()
+
         os.environ["TRAINING_ROLE"] = "PSERVER"
-        os.environ["http_proxy"] = ""
-        os.environ["https_proxy"] = ""
+        os.environ["PADDLE_PORT"] = str(port)
+        os.environ["PADDLE_PSERVERS_IP_PORT_LIST"] = "127.0.0.1:{}".format(port)
 
         _python = sys.executable
 
@@ -173,17 +173,14 @@ def runTest(self):
             stdout=subprocess.PIPE,
             stderr=subprocess.PIPE)
 
-        outs, errs = ps_proc.communicate(timeout=15)
-
-        time.sleep(1)
+        time.sleep(5)
 
         os.environ["TRAINING_ROLE"] = "TRAINER"
-        os.environ["http_proxy"] = ""
-        os.environ["https_proxy"] = ""
 
         self.run_ut()
         ps_proc.kill()
         ps_proc.wait()
+        outs, errs = ps_proc.communicate()
 
         if os.path.exists(server_file):
             os.remove(server_file)