diff --git a/mindspore_serving/ccsrc/worker/inference/mindspore_model_wrap.cc b/mindspore_serving/ccsrc/worker/inference/mindspore_model_wrap.cc
index 9474f39..c79fa25 100644
--- a/mindspore_serving/ccsrc/worker/inference/mindspore_model_wrap.cc
+++ b/mindspore_serving/ccsrc/worker/inference/mindspore_model_wrap.cc
@@ -99,7 +99,8 @@ Status MindSporeModelWrap::LoadModelFromFile(serving::DeviceType device_type, ui
   } catch (std::runtime_error &ex) {
     return INFER_STATUS_LOG_ERROR(FAILED)
            << "Load model from file failed, model file: " << file_name << ", device_type: '" << device_type
-           << "', device_id: " << device_id << ", model type: " << model_type << ", options: " << other_options;
+           << "', device_id: " << device_id << ", model type: " << model_type << ", options: " << other_options
+           << ", build error detail: " << ex.what();
   }
 
   ApiModelInfo api_model_info;
diff --git a/mindspore_serving/master/__init__.py b/mindspore_serving/master/__init__.py
index 8d4e8f2..15ca801 100644
--- a/mindspore_serving/master/__init__.py
+++ b/mindspore_serving/master/__init__.py
@@ -22,6 +22,5 @@ __all__.extend([
     "start_grpc_server",
     'start_restful_server',
     'start_master_server',
-    'stop',
-    'context'
+    'stop'
 ])
diff --git a/mindspore_serving/master/context.py b/mindspore_serving/master/context.py
index 2d32d87..c84b7c9 100644
--- a/mindspore_serving/master/context.py
+++ b/mindspore_serving/master/context.py
@@ -16,6 +16,8 @@
 from mindspore_serving._mindspore_serving import MasterContext_
 from mindspore_serving.common import check_type
 
+__all__ = ["set_max_request_buffer_count"]
+
 _context = MasterContext_.get_instance()