Fix for problem with too many processes

pypushflow/PythonActor.py

@@ -96,7 +96,7 @@ class AsyncFactory:
         self.func = func
         self.callback = callback
         self.errorCallback = errorCallback
-        self.pool = Edna2Pool()
+        self.pool = Edna2Pool(1)
 
     def call(self, *args, **kwargs):
         logger.debug('Before apply_async, func={0}, callback={1}, errorCallback={2}'.format(