inference modification for custom operator, test=develop (#31283)

paddle/fluid/framework/custom_operator.cc

@@ -667,10 +667,6 @@ void RegisterOperatorWithMetaInfo(
 void RegisterOperatorWithMetaInfoMap(
     const paddle::OpMetaInfoMap& op_meta_info_map) {
   auto& meta_info_map = op_meta_info_map.GetMap();
-
-  PADDLE_ENFORCE_EQ(meta_info_map.empty(), false,
-                    platform::errors::PreconditionNotMet(
-                        "No custom operator that needs to be registered."));
   VLOG(1) << "Custom Operator: size of op meta info map - "
           << meta_info_map.size();
   // pair: {op_type, OpMetaInfo}

paddle/fluid/inference/api/analysis_predictor.cc

@@ -21,6 +21,7 @@
 #include <string>
 #include <utility>
 #include <vector>
+#include "paddle/fluid/extension/include/ext_op_meta_info.h"
 #include "paddle/fluid/framework/feed_fetch_method.h"
 #include "paddle/fluid/framework/feed_fetch_type.h"
 #include "paddle/fluid/framework/ir/fuse_pass_base.h"
@@ -617,6 +618,7 @@ std::unique_ptr<PaddlePredictor> CreatePaddlePredictor<
     static bool process_level_allocator_enabled;
 
     std::call_once(gflags_initialized, [&]() {
+      paddle::RegisterAllCustomOperator();
       std::vector<std::string> gflags;
       PADDLE_ENFORCE_GE(
           config.memory_pool_init_size_mb(), 0.f,