diff --git a/test_lightrag_ollama_chat.py b/test_lightrag_ollama_chat.py
index 8cb633ba..d17d50fc 100644
--- a/test_lightrag_ollama_chat.py
+++ b/test_lightrag_ollama_chat.py
@@ -17,6 +17,19 @@ from typing import Dict, Any, Optional, List, Callable
 from dataclasses import dataclass, asdict
 from datetime import datetime
 from pathlib import Path
+from enum import Enum, auto
+
+class ErrorCode(Enum):
+    """Error codes for MCP errors"""
+    InvalidRequest = auto()
+    InternalError = auto()
+
+class McpError(Exception):
+    """Base exception class for MCP errors"""
+    def __init__(self, code: ErrorCode, message: str):
+        self.code = code
+        self.message = message
+        super().__init__(message)
 
 DEFAULT_CONFIG = {
     "server": {
@@ -641,35 +654,76 @@ def test_generate_concurrent() -> None:
         async with aiohttp.ClientSession() as session:
             yield session
 
-    async def make_request(session, prompt: str):
+    async def make_request(session, prompt: str, request_id: int):
         url = get_base_url("generate")
         data = create_generate_request_data(prompt, stream=False)
         try:
             async with session.post(url, json=data) as response:
                 if response.status != 200:
-                    response.raise_for_status()
-                return await response.json()
+                    error_msg = f"Request {request_id} failed with status {response.status}"
+                    if OutputControl.is_verbose():
+                        print(f"\n{error_msg}")
+                    raise McpError(ErrorCode.InternalError, error_msg)
+                result = await response.json()
+                if "error" in result:
+                    error_msg = f"Request {request_id} returned error: {result['error']}"
+                    if OutputControl.is_verbose():
+                        print(f"\n{error_msg}")
+                    raise McpError(ErrorCode.InternalError, error_msg)
+                return result
         except Exception as e:
-            return {"error": str(e)}
+            error_msg = f"Request {request_id} failed: {str(e)}"
+            if OutputControl.is_verbose():
+                print(f"\n{error_msg}")
+            raise McpError(ErrorCode.InternalError, error_msg)
 
     async def run_concurrent_requests():
         prompts = ["第一个问题", "第二个问题", "第三个问题", "第四个问题", "第五个问题"]
-
+        
         async with get_session() as session:
-            tasks = [make_request(session, prompt) for prompt in prompts]
-            results = await asyncio.gather(*tasks)
+            tasks = [make_request(session, prompt, i+1) for i, prompt in enumerate(prompts)]
+            results = await asyncio.gather(*tasks, return_exceptions=True)
+            
+            # 收集成功和失败的结果
+            success_results = []
+            error_messages = []
+            
+            for i, result in enumerate(results):
+                if isinstance(result, Exception):
+                    error_messages.append(f"Request {i+1} failed: {str(result)}")
+                else:
+                    success_results.append((i+1, result))
+            
+            # 如果有任何错误,在打印完所有结果后抛出异常
+            if error_messages:
+                # 先打印成功的结果
+                for req_id, result in success_results:
+                    if OutputControl.is_verbose():
+                        print(f"\nRequest {req_id} succeeded:")
+                        print_json_response(result)
+                
+                # 打印所有错误信息
+                error_summary = "\n".join(error_messages)
+                raise McpError(
+                    ErrorCode.InternalError,
+                    f"Some concurrent requests failed:\n{error_summary}"
+                )
+            
             return results
 
     if OutputControl.is_verbose():
         print("\n=== Testing concurrent generate requests ===")
 
     # Run concurrent requests
-    results = asyncio.run(run_concurrent_requests())
-
-    # Print results
-    for i, result in enumerate(results, 1):
-        print(f"\nRequest {i} result:")
-        print_json_response(result)
+    try:
+        results = asyncio.run(run_concurrent_requests())
+        # 如果没有异常,打印所有成功的结果
+        for i, result in enumerate(results, 1):
+            print(f"\nRequest {i} result:")
+            print_json_response(result)
+    except McpError as e:
+        # 错误信息已经在之前打印过了,这里直接抛出
+        raise
 
 
 def get_test_cases() -> Dict[str, Callable]: