!2611 fix serving same port bug

Merge pull request !2611 from dinghao/master

serving/core/server.cc

@@ -273,6 +273,11 @@ Status Server::BuildAndStart() {
   builder.RegisterService(&service);
   // Finally assemble the server.
   std::unique_ptr<grpc::Server> server(builder.BuildAndStart());
+  if (server == nullptr) {
+    MS_LOG(ERROR) << "The serving server create failed";
+    ClearEnv();
+    return FAILED;
+  }
   auto grpc_server_run = [&server]() { server->Wait(); };
   std::thread serving_thread(grpc_server_run);
   MS_LOG(INFO) << "Server listening on " << server_address << std::endl;

serving/scripts/format_source_code.sh

@@ -81,7 +81,7 @@ function checkopts()
 checkopts "$@"
 
 # switch to project root path, which contains clang-format config file '.clang-format'
-cd "${SCRIPTS_PATH}/.." || exit 1
+cd "${SCRIPTS_PATH}/../.." || exit 1
 
 FMT_FILE_LIST='__format_files_list__'