add timeout

python/paddle_serving_server/general_python_service.proto

@@ -26,4 +26,6 @@ message Request {
 message Response {
   repeated bytes fetch_insts = 1;
   repeated string fetch_var_names = 2;
+  required int32 is_error = 3;
+  optional string error_info = 4;
 }

python/paddle_serving_server/pyserver.py

@@ -28,6 +28,7 @@ import python_service_channel_pb2
 import logging
 import random
 import time
+import func_timeout
 
 
 class _TimeProfiler(object):
@@ -265,7 +266,8 @@ class Op(object):
                  client_config=None,
                  server_name=None,
                  fetch_names=None,
-                 concurrency=1):
+                 concurrency=1,
+                 timeout=-1):
         self._run = False
         # TODO: globally unique check
         self._name = name  # to identify the type of OP, it must be globally unique
@@ -282,6 +284,7 @@ class Op(object):
         self._server_model = server_model
         self._server_port = server_port
         self._device = device
+        self._timeout = timeout
 
     def set_client(self, client_config, server_name, fetch_names):
         self._client = Client()
@@ -344,6 +347,12 @@ class Op(object):
                 'Please override this method to convert data to the format in channel.'
             ))
 
+    def errorprocess(self, error_info):
+        data = python_service_channel_pb2.ChannelData()
+        data.is_error = 1
+        data.error_info = error_info
+        return data
+
     def stop(self):
         self._run = False
 
@@ -354,27 +363,55 @@ class Op(object):
             input_data = self._input.front(self._name)
             _profiler.record("{}{}-get_1".format(self._name, concurrency_idx))
             data_id = None
+            output_data = None
+            error_data = None
             logging.debug(self._log("input_data: {}".format(input_data)))
             if isinstance(input_data, dict):
                 key = input_data.keys()[0]
                 data_id = input_data[key].id
+                for _, data in input_data.items():
+                    if data.is_error != 0:
+                        error_data = data
+                        break
             else:
                 data_id = input_data.id
+                if input_data.is_error != 0:
+                    error_data = input_data
 
-            _profiler.record("{}{}-prep_0".format(self._name, concurrency_idx))
+            if error_data is None:
+                _profiler.record("{}{}-prep_0".format(self._name,
+                                                      concurrency_idx))
                 data = self.preprocess(input_data)
-            _profiler.record("{}{}-prep_1".format(self._name, concurrency_idx))
+                _profiler.record("{}{}-prep_1".format(self._name,
+                                                      concurrency_idx))
 
+                error_info = None
                 if self.with_serving():
                     _profiler.record("{}{}-midp_0".format(self._name,
                                                           concurrency_idx))
+                    if self._time > 0:
+                        try:
+                            data = func_timeout.func_timeout(
+                                self._time, self.midprocess, args=(data, ))
+                        except func_timeout.FunctionTimedOut:
+                            logging.error("error: timeout")
+                            error_info = "{}({}): timeout".format(
+                                self._name, concurrency_idx)
+                        except Exception as e:
+                            logging.error("error: {}".format(e))
+                            error_info = "{}({}): {}".format(self._name,
+                                                             concurrency_idx, e)
+                    else:
                         data = self.midprocess(data)
                     _profiler.record("{}{}-midp_1".format(self._name,
                                                           concurrency_idx))
 
-            _profiler.record("{}{}-postp_0".format(self._name, concurrency_idx))
+                _profiler.record("{}{}-postp_0".format(self._name,
+                                                       concurrency_idx))
+                if error_info is not None:
+                    output_data = self.errorprocess(error_info)
+                else:
                     output_data = self.postprocess(data)
-            _profiler.record("{}{}-postp_1".format(self._name, concurrency_idx))
 
                     if not isinstance(output_data,
                                       python_service_channel_pb2.ChannelData):
@@ -382,7 +419,13 @@ class Op(object):
                             self._log(
                                 'output_data must be ChannelData type, but get {}'.
                                 format(type(output_data))))
+                    output_data.is_error = 0
+                _profiler.record("{}{}-postp_1".format(self._name,
+                                                       concurrency_idx))
+
                 output_data.id = data_id
+            else:
+                output_data = error_data
 
             _profiler.record("{}{}-push_0".format(self._name, concurrency_idx))
             for channel in self._outputs:
@@ -398,7 +441,7 @@ class Op(object):
 
 class GeneralPythonService(
         general_python_service_pb2_grpc.GeneralPythonService):
-    def __init__(self, in_channel, out_channel):
+    def __init__(self, in_channel, out_channel, retry=2):
         super(GeneralPythonService, self).__init__()
         self._name = "#G"
         self.set_in_channel(in_channel)
@@ -412,6 +455,7 @@ class GeneralPythonService(
         self._cv = threading.Condition()
         self._globel_resp_dict = {}
         self._id_counter = 0
+        self._retry = retry
         self._recive_func = threading.Thread(
             target=GeneralPythonService._recive_out_channel_func, args=(self, ))
         self._recive_func.start()
@@ -480,11 +524,15 @@ class GeneralPythonService(
         resp = general_python_service_pb2.Response()
         logging.debug(self._log('gen resp'))
         logging.debug(data)
+        resp.is_error = data.is_error
+        if resp.is_error == 0:
             for inst in data.insts:
                 logging.debug(self._log('append data'))
                 resp.fetch_insts.append(inst.data)
                 logging.debug(self._log('append name'))
                 resp.fetch_var_names.append(inst.name)
+        else:
+            resp.error_info = data.error_info
         return resp
 
     def inference(self, request, context):
@@ -492,6 +540,7 @@ class GeneralPythonService(
         data, data_id = self._pack_data_for_infer(request)
         _profiler.record("{}-prepack_1".format(self._name))
 
+        for i in range(self._retry):
             logging.debug(self._log('push data'))
             _profiler.record("{}-push_0".format(self._name))
             self._in_channel.push(data, self._name)
@@ -503,6 +552,10 @@ class GeneralPythonService(
             resp_data = self._get_data_in_globel_resp_dict(data_id)
             _profiler.record("{}-fetch_1".format(self._name))
 
+            if resp_data.is_error == 0:
+                break
+            logging.warn("retry({}): {}".format(i + 1, resp_data.error_info))
+
         _profiler.record("{}-postpack_0".format(self._name))
         resp = self._pack_data_for_resp(resp_data)
         _profiler.record("{}-postpack_1".format(self._name))
@@ -511,7 +564,7 @@ class GeneralPythonService(
 
 
 class PyServer(object):
-    def __init__(self, profile=False):
+    def __init__(self, retry=2, profile=False):
         self._channels = []
         self._ops = []
         self._op_threads = []
@@ -519,6 +572,7 @@ class PyServer(object):
         self._worker_num = None
         self._in_channel = None
         self._out_channel = None
+        self._retry = retry
         _profiler.enable(profile)
 
     def add_channel(self, channel):
@@ -571,7 +625,8 @@ class PyServer(object):
         server = grpc.server(
             futures.ThreadPoolExecutor(max_workers=self._worker_num))
         general_python_service_pb2_grpc.add_GeneralPythonServiceServicer_to_server(
-            GeneralPythonService(self._in_channel, self._out_channel), server)
+            GeneralPythonService(self._in_channel, self._out_channel,
+                                 self._retry), server)
         server.add_insecure_port('[::]:{}'.format(self._port))
         server.start()
         try:

python/paddle_serving_server/python_service_channel.proto

@@ -19,6 +19,8 @@ message ChannelData {
   required int32 id = 2;
   optional string type = 3
       [ default = "CD" ]; // CD(channel data), CF(channel futures)
+  required int32 is_error = 4;
+  optional string error_info = 5;
 }
 
 message Inst {