diff --git a/core/general-client/src/general_model.cpp b/core/general-client/src/general_model.cpp
index 5d4f732fc19b605cb2e130c61a2e3cc0b2edc13a..86f75bc1c1b401cd14f2c6651ea52ef08fdb8c40 100644
--- a/core/general-client/src/general_model.cpp
+++ b/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();
diff --git a/core/sdk-cpp/include/stub_impl.hpp b/core/sdk-cpp/include/stub_impl.hpp
index 756c12893393f10a1c2ebfa83bf3a94adac7a4bc..5f19c0cad739ef33428bccbb48009ad648691b99 100644
--- a/core/sdk-cpp/include/stub_impl.hpp
+++ b/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;
   }