[Bug fixes] fix distributed graph engine (#51956)

* fix distributed graph engine

paddle/fluid/distributed/ps/service/graph_brpc_client.cc

@@ -51,7 +51,7 @@ int GraphBrpcClient::get_server_index_by_id(int64_t id) {
   int shard_per_server = shard_num % server_size == 0
                              ? shard_num / server_size
                              : shard_num / server_size + 1;
-  return id % shard_num / shard_per_server;
+  return static_cast<uint64_t>(id) % shard_num / shard_per_server;
 }
 
 std::future<int32_t> GraphBrpcClient::get_node_feat(

paddle/fluid/distributed/ps/service/graph_brpc_server.cc

@@ -144,7 +144,7 @@ int32_t GraphBrpcService::add_graph_node(Table *table,
     return 0;
   }
 
-  int idx_ = std::stoi(request.params(0).c_str());
+  int idx_ = *reinterpret_cast<const int *>(request.params(0).c_str());
   size_t node_num = request.params(1).size() / sizeof(int64_t);
   const uint64_t *node_data =
       reinterpret_cast<const uint64_t *>(request.params(1).c_str());
@@ -181,7 +181,7 @@ int32_t GraphBrpcService::remove_graph_node(Table *table,
         "remove_graph_node request requires at least 2 arguments");
     return 0;
   }
-  int idx_ = std::stoi(request.params(0).c_str());
+  int idx_ = *reinterpret_cast<const int *>(request.params(0).c_str());
   size_t node_num = request.params(1).size() / sizeof(uint64_t);
   const uint64_t *node_data =
       reinterpret_cast<const uint64_t *>(request.params(1).c_str());
@@ -408,7 +408,7 @@ int32_t GraphBrpcService::graph_random_sample_neighbors(
         "graph_random_sample_neighbors request requires at least 3 arguments");
     return 0;
   }
-  int idx_ = std::stoi(request.params(0).c_str());
+  int idx_ = *reinterpret_cast<const int *>(request.params(0).c_str());
   size_t node_num = request.params(1).size() / sizeof(uint64_t);
   uint64_t *node_data = (uint64_t *)(request.params(1).c_str());  // NOLINT
   const int sample_size =
@@ -464,7 +464,7 @@ int32_t GraphBrpcService::graph_get_node_feat(Table *table,
         "graph_get_node_feat request requires at least 3 arguments");
     return 0;
   }
-  int idx_ = std::stoi(request.params(0).c_str());
+  int idx_ = *reinterpret_cast<const int *>(request.params(0).c_str());
   size_t node_num = request.params(1).size() / sizeof(uint64_t);
   const uint64_t *node_data =
       reinterpret_cast<const uint64_t *>(request.params(1).c_str());
@@ -505,12 +505,12 @@ int32_t GraphBrpcService::sample_neighbors_across_multi_servers(
     return 0;
   }
 
-  int idx_ = std::stoi(request.params(0).c_str());
+  int idx_ = *reinterpret_cast<const int *>(request.params(0).c_str());
   size_t node_num = request.params(1).size() / sizeof(uint64_t);
   const uint64_t *node_data =
       reinterpret_cast<const uint64_t *>(request.params(1).c_str());
-  int sample_size = std::stoi(request.params(2).c_str());
-  bool need_weight = std::stoi(request.params(3).c_str());
+  int sample_size = *reinterpret_cast<const int *>(request.params(2).c_str());
+  bool need_weight = *reinterpret_cast<const bool *>(request.params(3).c_str());
 
   std::vector<int> request2server;
   std::vector<int> server2request(server_size, -1);
@@ -671,7 +671,7 @@ int32_t GraphBrpcService::graph_set_node_feat(Table *table,
         "graph_set_node_feat request requires at least 3 arguments");
     return 0;
   }
-  int idx_ = std::stoi(request.params(0).c_str());
+  int idx_ = *reinterpret_cast<const int *>(request.params(0).c_str());
 
   size_t node_num = request.params(1).size() / sizeof(uint64_t);
   const uint64_t *node_data =