diff --git a/mindspore_serving/ccsrc/common/grpc_server.cc b/mindspore_serving/ccsrc/common/grpc_server.cc
index d05b5df..53be5db 100644
--- a/mindspore_serving/ccsrc/common/grpc_server.cc
+++ b/mindspore_serving/ccsrc/common/grpc_server.cc
@@ -35,6 +35,7 @@ Status GrpcServer::Start(std::shared_ptr<grpc::Service> service, const std::stri
   grpc::ServerBuilder serverBuilder;
   serverBuilder.SetOption(std::move(option));
   if (max_msg_mb_size > 0) {
+    serverBuilder.SetMaxSendMessageSize(static_cast<int>(max_msg_mb_size * (1u << 20)));
     serverBuilder.SetMaxReceiveMessageSize(static_cast<int>(max_msg_mb_size * (1u << 20)));
   }
   serverBuilder.AddListeningPort(server_address, grpc::InsecureServerCredentials());
@@ -66,4 +67,12 @@ void GrpcServer::Stop() {
   in_running_ = false;
 }
 
+std::shared_ptr<grpc::Channel> GrpcServer::CreateChannel(const std::string &target_str) {
+  grpc::ChannelArguments channel_args;
+  channel_args.SetInt(GRPC_ARG_MAX_RECEIVE_MESSAGE_LENGTH, gRpcMaxMBMsgSize * 1024 * 1024);
+  std::shared_ptr<grpc::Channel> channel =
+    grpc::CreateCustomChannel(target_str, grpc::InsecureChannelCredentials(), channel_args);
+  return channel;
+}
+
 }  // namespace mindspore::serving
diff --git a/mindspore_serving/ccsrc/common/grpc_server.h b/mindspore_serving/ccsrc/common/grpc_server.h
index 662cc59..82caae0 100644
--- a/mindspore_serving/ccsrc/common/grpc_server.h
+++ b/mindspore_serving/ccsrc/common/grpc_server.h
@@ -39,6 +39,7 @@ class MS_API GrpcServer {
   Status Start(std::shared_ptr<grpc::Service> service, const std::string &ip, uint32_t grpc_port, int max_msg_size,
                const std::string &server_tag);
   void Stop();
+  static std::shared_ptr<grpc::Channel> CreateChannel(const std::string &target_str);
 
  private:
   std::unique_ptr<grpc::Server> server_;
diff --git a/mindspore_serving/ccsrc/master/dispacther.cc b/mindspore_serving/ccsrc/master/dispacther.cc
index bb536d8..5c3975c 100644
--- a/mindspore_serving/ccsrc/master/dispacther.cc
+++ b/mindspore_serving/ccsrc/master/dispacther.cc
@@ -101,7 +101,7 @@ Status Dispatcher::RegisterServable(const proto::RegisterRequest &request, proto
     auto target_str = request.address();
     auto it = servable_map_.find(worker_spec.servable_name);
 
-    std::shared_ptr<grpc::Channel> channel = grpc::CreateChannel(target_str, grpc::InsecureChannelCredentials());
+    std::shared_ptr<grpc::Channel> channel = GrpcServer::CreateChannel(target_str);
 
     bool find_registered = false;
     if (it != servable_map_.end()) {
@@ -178,7 +178,8 @@ Status Dispatcher::AddServable(const proto::AddWorkerRequest &request, proto::Ad
   }
   DispatcherWorkerContext context;
   context.worker_spec = worker_spec;
-  std::shared_ptr<grpc::Channel> channel = grpc::CreateChannel(target_str, grpc::InsecureChannelCredentials());
+
+  std::shared_ptr<grpc::Channel> channel = GrpcServer::CreateChannel(target_str);
   context.stub_ = proto::MSWorker::NewStub(channel);
   servable_map_[worker_spec.servable_name].push_back(context);
   return SUCCESS;
diff --git a/mindspore_serving/ccsrc/master/server.cc b/mindspore_serving/ccsrc/master/server.cc
index b51782c..118edc2 100644
--- a/mindspore_serving/ccsrc/master/server.cc
+++ b/mindspore_serving/ccsrc/master/server.cc
@@ -45,7 +45,8 @@ Status Server::StartGrpcServer(const std::string &ip, uint32_t grpc_port, int ma
 }
 
 Status Server::StartGrpcMasterServer(const std::string &ip, uint32_t grpc_port) {
-  return grpc_manager_server_.Start(std::make_shared<MSMasterImpl>(dispatcher_), ip, grpc_port, -1, "Master");
+  return grpc_manager_server_.Start(std::make_shared<MSMasterImpl>(dispatcher_), ip, grpc_port, gRpcMaxMBMsgSize,
+                                    "Master");
 }
 
 Status Server::StartRestfulServer(const std::string &ip, uint32_t restful_port, int max_msg_mb_size,
diff --git a/mindspore_serving/ccsrc/worker/notfiy_master/grpc_notfiy.cc b/mindspore_serving/ccsrc/worker/notfiy_master/grpc_notfiy.cc
index 4e6c60e..b889d04 100644
--- a/mindspore_serving/ccsrc/worker/notfiy_master/grpc_notfiy.cc
+++ b/mindspore_serving/ccsrc/worker/notfiy_master/grpc_notfiy.cc
@@ -19,6 +19,7 @@
 #include <grpcpp/ext/proto_server_reflection_plugin.h>
 #include <thread>
 #include "common/exit_handle.h"
+#include "common/grpc_server.h"
 
 namespace mindspore {
 namespace serving {
@@ -28,7 +29,7 @@ GrpcNotfiyMaster::GrpcNotfiyMaster(const std::string &master_ip, uint32_t master
     : master_ip_(master_ip), master_port_(master_port), host_ip_(host_ip), host_port_(host_port) {
   master_address_ = master_ip_ + ":" + std::to_string(master_port);
   worker_address_ = host_ip_ + ":" + std::to_string(host_port_);
-  auto channel = grpc::CreateChannel(master_address_, grpc::InsecureChannelCredentials());
+  auto channel = GrpcServer::CreateChannel(master_address_);
   stub_ = proto::MSMaster::NewStub(channel);
 }
 
diff --git a/mindspore_serving/ccsrc/worker/worker.cc b/mindspore_serving/ccsrc/worker/worker.cc
index cb6143b..6f1e043 100644
--- a/mindspore_serving/ccsrc/worker/worker.cc
+++ b/mindspore_serving/ccsrc/worker/worker.cc
@@ -172,12 +172,14 @@ std::pair<Status, std::shared_ptr<AsyncResult>> Worker::RunAsync(const RequestSp
   if (worker.worker_service == nullptr) {
     return {INFER_STATUS_LOG_ERROR(FAILED) << "Cannot find servable match " << request_spec.Repr(), nullptr};
   }
-  WorkCallBack on_process_done = [result](const Instance &output, const Status &error_msg) {
+  std::weak_ptr<AsyncResult> result_weak = result;  // avoid memory leak
+  WorkCallBack on_process_done = [result_weak](const Instance &output, const Status &error_msg) {
     auto output_index = output.context.instance_index;
-    if (output_index < result->result_.size()) {
-      result->result_[output_index].error_msg = error_msg;
+    auto result_ptr = result_weak.lock();
+    if (result_ptr && output_index < result_ptr->result_.size()) {
+      result_ptr->result_[output_index].error_msg = error_msg;
       if (error_msg == SUCCESS) {
-        result->result_[output_index] = output;
+        result_ptr->result_[output_index] = output;
       }
     }
   };