diff --git a/paddle/fluid/operators/distributed/brpc_sendrecvop_utils.cc b/paddle/fluid/operators/distributed/brpc_sendrecvop_utils.cc
index 6fed9ba92c16477c79509a30911920e67b9f9bdd..e4604db3a381616c7420f816f0b49a015c925bd4 100644
--- a/paddle/fluid/operators/distributed/brpc_sendrecvop_utils.cc
+++ b/paddle/fluid/operators/distributed/brpc_sendrecvop_utils.cc
@@ -16,6 +16,7 @@ limitations under the License. */
 #include <nccl.h>
 #endif
 #include <sys/time.h>
+#include <limits>
 #include <thread>  // NOLINT
 
 #include "paddle/fluid/framework/data_type.h"
@@ -31,7 +32,12 @@ namespace distributed {
 
 class IOBufWriter {
  public:
-  static void Append(butil::IOBuf* iobuf, int k, const char* v, int64_t vlen) {
+  static void Append(const std::string& varname, butil::IOBuf* iobuf, int k,
+                     const char* v, int64_t vlen) {
+    if (vlen >= std::numeric_limits<int>::max() || vlen < 0) {
+      LOG(FATAL) << "AppendZeroCopy varname:" << varname << ", vlen:" << vlen;
+    }
+
     iobuf->append(reinterpret_cast<char*>(&k), 4);
     iobuf->append(reinterpret_cast<char*>(&vlen), 8);
     iobuf->append(v, vlen);
@@ -87,6 +93,10 @@ class IOBufWriter {
                              int k, const char* v, int64_t vlen,
                              bool in_cuda_pinned, void (*destroy)(void*),
                              void* user_data) {
+    if (vlen >= std::numeric_limits<int>::max() || vlen < 0) {
+      LOG(FATAL) << "AppendZeroCopy varname:" << varname << ", vlen:" << vlen;
+    }
+
 #ifdef PADDLE_WITH_BRPC_RDMA
     IOBufWriter::AppendRdmaZeroCopy(varname, iobuf, k, v, vlen, in_cuda_pinned,
                                     destroy, user_data);
@@ -134,7 +144,7 @@ void SerializeToIOBuf(const std::string& name, framework::Variable* var,
     request->set_type(::sendrecv::NCCL_ID);
     const ncclUniqueId& uid = var->Get<ncclUniqueId>();
     // TODO(gongwb): use append_zero to avoid data copy.
-    IOBufWriter::Append(iobuf,
+    IOBufWriter::Append(name, iobuf,
                         sendrecv::VariableMessage::kSerializedFieldNumber,
                         uid.internal, NCCL_UNIQUE_ID_BYTES);
     return;
@@ -149,7 +159,7 @@ void SerializeToIOBuf(const std::string& name, framework::Variable* var,
   // FIXME(gongwb): it seems that can use zero copy.
   if (var_is_not_stable) {
     IOBufWriter::Append(
-        iobuf, ::sendrecv::VariableMessage::kSerializedFieldNumber,
+        name, iobuf, ::sendrecv::VariableMessage::kSerializedFieldNumber,
         static_cast<const char*>(payload->ptr()), payload->memory_size());
   } else {
     if (platform::is_gpu_place(ctx.GetPlace())) {
@@ -171,10 +181,11 @@ void SerializeToIOBuf(const std::string& name, framework::Variable* var,
 
   if (var->IsType<framework::SelectedRows>()) {
     auto* slr = var->GetMutable<framework::SelectedRows>();
-    size_t rows_memory_size =
-        slr->rows().size() * framework::SizeOfType(typeid(int64_t));
+    PADDLE_ENFORCE(VectorElemName(slr->rows()) == typeid(int64_t).name());
+    size_t rows_memory_size = slr->rows().size() * sizeof(int64_t);
 
-    IOBufWriter::Append(iobuf, ::sendrecv::VariableMessage::kRowsFieldNumber,
+    IOBufWriter::Append(name, iobuf,
+                        ::sendrecv::VariableMessage::kRowsFieldNumber,
                         reinterpret_cast<const char*>(slr->rows().data()),
                         static_cast<int64_t>(rows_memory_size));
   }
diff --git a/paddle/fluid/operators/distributed/grpc_serde.cc b/paddle/fluid/operators/distributed/grpc_serde.cc
index 299dfe35438c35ec922dcdc75bf774a00f111bbb..a9dea9cfd2eeaa7e7ed8f052d2f51f5893c1e2e3 100644
--- a/paddle/fluid/operators/distributed/grpc_serde.cc
+++ b/paddle/fluid/operators/distributed/grpc_serde.cc
@@ -15,6 +15,7 @@ limitations under the License. */
 #ifdef PADDLE_WITH_CUDA
 #include <nccl.h>
 #endif
+#include <limits>
 #include <thread>  // NOLINT
 
 #include "google/protobuf/io/coded_stream.h"
@@ -102,6 +103,10 @@ void SerializeToByteBuffer(const std::string& name, framework::Variable* var,
 
   e.WriteVarlengthBeginning(VarMsg::kSerializedFieldNumber,
                             payload->memory_size());
+  if (payload->memory_size() >= std::numeric_limits<int>::max()) {
+    LOG(FATAL) << "AppendZeroCopy varname:" << name
+               << ", vlen:" << payload->memory_size();
+  }
   // steal reference of tensor data
   ::grpc::Slice slices[4];  // metadata, tensor, rows meta, rows
   int num_slices = 2;       // only SelectedRows have rows buffer
@@ -115,7 +120,10 @@ void SerializeToByteBuffer(const std::string& name, framework::Variable* var,
   if (var->IsType<framework::SelectedRows>()) {
     auto* slr = var->GetMutable<framework::SelectedRows>();
     ProtoEncodeHelper e2(static_cast<char*>(buf), 128);
+
+    PADDLE_ENFORCE(VectorElemName(slr->rows()) == typeid(int64_t).name());
     size_t rows_memory_size = slr->rows().size() * sizeof(int64_t);
+
     e2.WriteVarlengthBeginning(VarMsg::kRowsFieldNumber, rows_memory_size);
     slices[2] = ::grpc::Slice(e2.size());
     memcpy(const_cast<uint8_t*>(slices[2].begin()), e2.data(), e2.size());
diff --git a/paddle/fluid/operators/distributed/sendrecvop_utils.h b/paddle/fluid/operators/distributed/sendrecvop_utils.h
index 33eded0e6c0d90dadeeb63594983224d795fa244..6a87178be5daa02444c41a26f6e6c067713dd96f 100644
--- a/paddle/fluid/operators/distributed/sendrecvop_utils.h
+++ b/paddle/fluid/operators/distributed/sendrecvop_utils.h
@@ -15,6 +15,7 @@ limitations under the License. */
 #pragma once
 #include <iostream>
 #include <string>
+#include <typeindex>
 #include <vector>
 
 #include "paddle/fluid/framework/data_type.h"
@@ -23,9 +24,8 @@ limitations under the License. */
 #include "paddle/fluid/framework/selected_rows.h"
 #include "paddle/fluid/framework/tensor_util.h"
 #include "paddle/fluid/framework/var_type.h"
-#include "paddle/fluid/platform/port.h"
-
 #include "paddle/fluid/operators/distributed/send_recv.pb.h"
+#include "paddle/fluid/platform/port.h"
 
 namespace paddle {
 namespace operators {
@@ -83,6 +83,11 @@ inline framework::proto::VarType::Type ToVarType(
   }
 }
 
+template <template <typename> class T, typename Elem>
+std::string VectorElemName(const T<Elem>& arg) {
+  return typeid(Elem).name();
+}
+
 }  // namespace distributed
 }  // namespace operators
 }  // namespace paddle
diff --git a/paddle/fluid/operators/distributed/variable_response.cc b/paddle/fluid/operators/distributed/variable_response.cc
index 921c96b5839a37a4024b17b9ff71442f31b5b8f0..47ff568a1135f2f0a146faa4d5d6fc422a344f51 100644
--- a/paddle/fluid/operators/distributed/variable_response.cc
+++ b/paddle/fluid/operators/distributed/variable_response.cc
@@ -118,7 +118,7 @@ bool VariableResponse::CopyLodTensorData(
 
   VLOG(6) << "Tensor.memory_size = " << tensor->memory_size()
           << ", Buffer Size = " << length;
-  PADDLE_ENFORCE_EQ(tensor->memory_size(), length);
+  PADDLE_ENFORCE_EQ(tensor->memory_size(), static_cast<unsigned int>(length));
   return ReadRaw(input, ctx, tensor->place(), tensor_data, length);
 }