mcp perf (#6697)

* mcp perf

* fix: null object

Author: c121914yu

packages/service/core/app/mcp.ts

@@ -39,28 +39,22 @@ export class MCPClient {
       throw error;
     });
 
-    this.client.onerror = (error) => {
-      logger.error('MCP client connection error', { url: this.url, error });
-      this.connectionPromise = null;
-    };
-    this.client.onclose = () => {
-      this.connectionPromise = null;
-    };
-
     return this.connectionPromise;
   }
 
   private async doConnect(): Promise<Client> {
+    // 避免连接重复，强制关闭一次
+    await this.client.close().catch(() => {});
+
+    logger.debug('Start connect mcp client', { url: this.url });
     try {
       const transport = new StreamableHTTPClientTransport(new URL(this.url), {
         requestInit: {
           headers: this.headers
         }
       });
       await this.client.connect(transport);
-      return this.client;
     } catch (error) {
-      await this.client.close().catch(() => {});
       await this.client.connect(
         new SSEClientTransport(new URL(this.url), {
           requestInit: {
@@ -90,8 +84,19 @@ export class MCPClient {
           }
         })
       );
-      return this.client;
     }
+
+    this.client.onerror = (error) => {
+      // 忽略掉不支持 streamable 的错误
+      if (error?.message?.includes('SSE stream: Not Found')) return;
+      logger.warn('MCP client connection error', { url: this.url, error });
+      this.connectionPromise = null;
+    };
+    this.client.onclose = () => {
+      this.connectionPromise = null;
+    };
+
+    return this.client;
   }
 
   // 内部方法：关闭连接