local predictor+web stop gracefully

python/paddle_serving_server/util.py

@@ -59,16 +59,19 @@ def kill_stop_process_by_pid(command : str, pid : int):
     if not pid_is_exist(pid):
         print("Process [%s]  has been stopped."%pid)
         return
-    try:
-         if command == "stop":
-             os.killpg(pid, signal.SIGINT)
-         elif command == "kill":
-             os.killpg(pid, signal.SIGKILL)
-    except ProcessLookupError:
-         if command == "stop":
-             os.kill(pid, signal.SIGINT)
-         elif command == "kill":
-             os.kill(pid, signal.SIGKILL)
+    if platform.system() == "Windows":
+        os.kill(pid, signal.SIGINT)   
+    else:
+        try:
+             if command == "stop":
+                 os.killpg(pid, signal.SIGINT)
+             elif command == "kill":
+                 os.killpg(pid, signal.SIGKILL)
+        except ProcessLookupError:
+             if command == "stop":
+                 os.kill(pid, signal.SIGINT)
+             elif command == "kill":
+                 os.kill(pid, signal.SIGKILL)
 
 def dump_pid_file(portList, model):
     '''

python/paddle_serving_server/web_service.py

@@ -28,6 +28,7 @@ import os
 from paddle_serving_server import pipeline
 from paddle_serving_server.pipeline import Op
 from paddle_serving_server.serve import format_gpu_to_strlist
+from paddle_serving_server.util import dump_pid_file
 
 
 def port_is_available(port):
@@ -260,7 +261,9 @@ class WebService(object):
         self.gpu_multi_stream = gpu_multi_stream
         self.op_num = op_num
         self.op_max_batch = op_max_batch
-
+       
+        # record port and pid info for stopping process
+        dump_pid_file([self.port], "web_service")
         # if gpuid != None, we will use gpuid first.
         # otherwise, keep the self.gpus unchanged.
         # maybe self.gpus is set by the Function set_gpus.