diff --git a/src/brpc/nonreflectable_message.h b/src/brpc/nonreflectable_message.h
index 1494cd1b75..7f2acd78a3 100644
--- a/src/brpc/nonreflectable_message.h
+++ b/src/brpc/nonreflectable_message.h
@@ -223,7 +223,20 @@ class NonreflectableMessage : public ::google::protobuf::Message {
     struct NonreflectableMessageClassData : ClassDataFull {
         constexpr NonreflectableMessageClassData()
                 : ClassDataFull(
-#    if GOOGLE_PROTOBUF_VERSION >= 5029000
+#    if GOOGLE_PROTOBUF_VERSION >= 7034000
+                        ClassData{
+                                &_instance, // prototype
+                                nullptr,    // tc_table
+                                nullptr,    // is_initialized
+                                nullptr,    // merge_to_from
+                                ::google::protobuf::internal::MessageCreator(), // message_creator
+                                0,     // cached_size_offset
+                                false, // is_lite
+                        },
+                        nullptr, // descriptor_methods
+                        nullptr, // descriptor_table
+                        nullptr  // get_metadata_tracker
+#    elif GOOGLE_PROTOBUF_VERSION >= 5029000
                         ClassData{
                                 &_instance, // prototype
                                 nullptr,    // tc_table
diff --git a/src/json2pb/json_to_pb.cpp b/src/json2pb/json_to_pb.cpp
index 491ab92116..c048a8b8c9 100644
--- a/src/json2pb/json_to_pb.cpp
+++ b/src/json2pb/json_to_pb.cpp
@@ -119,7 +119,7 @@ static void string_append_value(const BUTIL_RAPIDJSON_NAMESPACE::Value& value,
 //otherwise will append error into error message and return false.
 inline bool value_invalid(const google::protobuf::FieldDescriptor* field, const char* type,
                           const BUTIL_RAPIDJSON_NAMESPACE::Value& value, std::string* err) {
-    bool optional = field->is_optional();
+    bool optional = !field->is_required() && !field->is_repeated();
     if (err) {
         if (!err->empty()) {
             err->append(", ");
diff --git a/src/mcpack2pb/generator.cpp b/src/mcpack2pb/generator.cpp
index fe47fb33fa..26aa4b5bd8 100644
--- a/src/mcpack2pb/generator.cpp
+++ b/src/mcpack2pb/generator.cpp
@@ -482,7 +482,7 @@ static bool generate_parsing(const google::protobuf::Descriptor* d,
             } break;
             } // switch
         } else {
-            if (f->is_optional()) {
+            if (!f->is_required() && !f->is_repeated()) {
                 impl.Print("// optional $type$ $name$ = $number$;\n"
                            , "type", field_to_string(f)
                            , "name", f->name()
@@ -888,12 +888,12 @@ static bool generate_serializing(const google::protobuf::Descriptor* d,
             butil::string_printf(&comment_template,
                                 "// %s $type$ $name$ = $number$;\n",
                                 (f->is_repeated() ? "repeated" :
-                                 (f->is_optional() ? "optional" : "required")));
+                                 (f->is_required() ? "required" : "optional")));
         } else {
             butil::string_printf(&comment_template,
                                 "// %s $type$ $name$ = $number$ [(idl_type)=%s];\n",
                                 (f->is_repeated() ? "repeated" :
-                                 (f->is_optional() ? "optional" : "required")),
+                                 (f->is_required() ? "required" : "optional")),
                                 describe_idl_type(cit));
         }
         impl.Print(comment_template.c_str()