diff --git a/python/examples/fit_a_line/test_py_client.py b/python/examples/fit_a_line/test_py_client.py
index 57ef3b405dfb94ebbdf398c7b2f28b617a51dab6..76fee2804daf6e98d0cb12a562e8b69ffa97742b 100644
--- a/python/examples/fit_a_line/test_py_client.py
+++ b/python/examples/fit_a_line/test_py_client.py
@@ -29,11 +29,11 @@ x = np.array(
 lp = LineProfiler()
 lp_wrapper = lp(client.predict)
 
-for i in range(3):
+for i in range(1):
     fetch_map = lp_wrapper(
         feed={"x": x}, fetch_with_type={"combine_op_output": "float"})
     # fetch_map = client.predict(
     # feed={"x": x}, fetch_with_type={"combine_op_output": "float"})
     print(fetch_map)
 
-lp.print_stats()
+#lp.print_stats()
diff --git a/python/examples/fit_a_line/test_py_server.py b/python/examples/fit_a_line/test_py_server.py
index 863ac55040f0b60aade4e2f6d103d7a7d34558ed..ff4542560a455af4b8256c8daf9b2c62ac5d8568 100644
--- a/python/examples/fit_a_line/test_py_server.py
+++ b/python/examples/fit_a_line/test_py_server.py
@@ -72,7 +72,9 @@ cnn_op = UciOp(
     client_config="uci_housing_client/serving_client_conf.prototxt",
     server_name="127.0.0.1:9393",
     fetch_names=["price"],
-    concurrency=1)
+    concurrency=1,
+    timeout=0.01,
+    retry=2)
 
 bow_op = UciOp(
     name="bow",
@@ -86,7 +88,9 @@ bow_op = UciOp(
     client_config="uci_housing_client/serving_client_conf.prototxt",
     server_name="127.0.0.1:9393",
     fetch_names=["price"],
-    concurrency=1)
+    concurrency=1,
+    timeout=-1,
+    retry=1)
 
 combine_op = CombineOp(
     name="combine",
@@ -94,12 +98,14 @@ combine_op = CombineOp(
     in_dtype='float',
     outputs=[out_channel],
     out_dtype='float',
-    concurrency=1)
+    concurrency=1,
+    timeout=-1,
+    retry=1)
 
 logging.info(read_channel.debug())
 logging.info(combine_channel.debug())
 logging.info(out_channel.debug())
-pyserver = PyServer(profile=False)
+pyserver = PyServer(profile=False, retry=1)
 pyserver.add_channel(read_channel)
 pyserver.add_channel(combine_channel)
 pyserver.add_channel(out_channel)
diff --git a/python/paddle_serving_server/pyserver.py b/python/paddle_serving_server/pyserver.py
index c418710bb3f84bd1e4d8ae1b798de511b85cb360..420df4ef5079cd63ebc411fd157b1d5cf14b2a21 100644
--- a/python/paddle_serving_server/pyserver.py
+++ b/python/paddle_serving_server/pyserver.py
@@ -42,12 +42,16 @@ class _TimeProfiler(object):
         self._enable = enable
 
     def record(self, name_with_tag):
+        if self._enable is False:
+            return
         name_with_tag = name_with_tag.split("_")
         tag = name_with_tag[-1]
         name = '_'.join(name_with_tag[:-1])
         self._time_record.put((name, tag, int(round(time.time() * 1000000))))
 
     def print_profile(self):
+        if self._enable is False:
+            return
         sys.stderr.write(self._print_head)
         tmp = {}
         while not self._time_record.empty():
@@ -392,10 +396,12 @@ class Op(object):
                     for i in range(self._retry):
                         _profiler.record("{}{}-midp_0".format(self._name,
                                                               concurrency_idx))
-                        if self._time > 0:
+                        if self._timeout > 0:
                             try:
                                 middata = func_timeout.func_timeout(
-                                    self._time, self.midprocess, args=(data, ))
+                                    self._timeout,
+                                    self.midprocess,
+                                    args=(data, ))
                             except func_timeout.FunctionTimedOut:
                                 logging.error("error: timeout")
                                 error_info = "{}({}): timeout".format(
@@ -520,6 +526,7 @@ class GeneralPythonService(
         data = python_service_channel_pb2.ChannelData()
         data_id = self._get_next_id()
         data.id = data_id
+        data.is_error = 0
         for idx, name in enumerate(request.feed_var_names):
             logging.debug(
                 self._log('name: {}'.format(request.feed_var_names[idx])))