Merge pull request #343 from guru4elephant/fix_predict_return_code

Fix predict return code

core/general-client/src/general_model.cpp

@@ -367,7 +367,7 @@ int PredictorClient::batch_predict(
   res.Clear();
   if (_predictor->inference(&req, &res) != 0) {
     LOG(ERROR) << "failed call predictor with req: " << req.ShortDebugString();
-    exit(-1);
+    return -1;
   } else {
     client_infer_end = timeline.TimeStampUS();
     postprocess_start = client_infer_end;

python/paddle_serving_client/__init__.py

@@ -239,6 +239,9 @@ class Client(object):
             float_slot_batch, float_feed_names, int_slot_batch, int_feed_names,
             fetch_names, result_batch, self.pid)
 
+        if res == -1:
+            return None
+
         result_map_batch = []
         result_map = {}
         for i, name in enumerate(fetch_names):