Merge pull request #500 from barrierye/fix-client-warn

Fix Warning(Already thread initialized for stub) in client

core/general-client/src/general_model.cpp

@@ -244,6 +244,7 @@ int PredictorClient::batch_predict(
   res.Clear();
   if (_predictor->inference(&req, &res) != 0) {
     LOG(ERROR) << "failed call predictor with req: " << req.ShortDebugString();
+    _api.thrd_clear();
     return -1;
   } else {
     client_infer_end = timeline.TimeStampUS();

core/sdk-cpp/include/stub_impl.hpp

@@ -133,7 +133,10 @@ int StubImpl<T, C, R, I, O>::initialize(const VariantInfo& var,
 template <typename T, typename C, typename R, typename I, typename O>
 int StubImpl<T, C, R, I, O>::thrd_initialize() {
   if (THREAD_GETSPECIFIC(_bthread_key) != NULL) {
-    LOG(WARNING) << "Already thread initialized for stub";
+    // Because gPRC is uesd, this function may be called
+    // multiple times, so the warning will be commented out
+    // temporarily. See PR:#483 and PR:#500 for details.
+    // LOG(WARNING) << "Already thread initialized for stub";
     return 0;
   }