jd-opensource/joyagent-jdgenie · error · Exception

服务器ping失败

Error message

{self.server_url} 服务器ping失败: {str(e)}

What it means

`ping_server` wraps any exception thrown while establishing or completing the SSE ping into a single Exception prefixed with the server URL. It is a catch-all: the inner cause (auth, network, protocol) is attached via `from e`, so this is a labeling wrapper, not a distinct failure mode.

Solutions

1. Read the chained cause (`__cause__`) or the appended inner message to find the real failure (auth vs network)
2. Re-run after confirming the server is up: this is usually a transient startup ordering issue
3. Validate server_url and credentials as with the underlying auth/network errors
4. Add retry-with-backoff around ping_server for readiness checks

Example fix

// before
await client.ping_server()  # server not started yet
// after
await asyncio.sleep(5)  # wait for server readiness
await client.ping_server()

await client.ping_server()  # cheap readiness check before other calls
typeGuard = None

try:
    msg = await client.ping_server()
except Exception as e:
    logger.warning(f"ping failed: {e.__cause__}")
    # decide: retry (transient) vs abort (auth/config)

When it happens

Trigger: Calling `await client.ping_server()` and the SSE session fails for any reason (auth 401, network error, server not speaking MCP, timeout) — the inner message is appended to the raised text.

Common situations: Health-check at startup against a not-yet-ready server; misconfigured server_url; credential issues surfacing as ping failures.

Understand the failure class

Background: 'Something went wrong' / 'Request failed (500)' / 'HTTP error! status: 404' — what failed HTTP requests actually mean and how to find the real cause — this error's family across 28 libraries.

Related errors

• 获取工具列表失败
• sse nl2sql failed:
• sse listener failed
• 认证失败 - 无效的凭据
• 网络连接失败

AI-assisted analysis of jd-opensource/joyagent-jdgenie@2417e0b8b6 (2026-09-08). Data as JSON: /api/errors/bfd2eaff02f1f9e0. Report an issue: GitHub.

Appendix: source

Thrown at genie-client/app/client.py:264

        向服务器发送ping请求以验证连接

        Returns:
            str: 成功消息

        Raises:
            Exception: 当ping失败时抛出异常
        """
        try:
            async with self._sse_connection() as session:
                logger.info(f"{self.server_url} 正在ping服务器...")
                await session.send_ping()
                success_msg = "服务器ping成功！"
                logger.info(success_msg)
                return success_msg
        except Exception as e:
            error_msg = f"{self.server_url} 服务器ping失败: {str(e)}"
            logger.error(error_msg)
            raise Exception(error_msg) from e

    async def list_tools(self) -> List[Any]:
        """
        获取服务器上可用的工具列表

        Returns:
            List[Any]: 可用工具列表

        Raises:
            Exception: 当获取工具列表失败时抛出异常
        """
        try:
            async with self._sse_connection() as session:
                logger.info(f"{self.server_url} 正在获取工具列表...")
                response = await session.list_tools()
                tools = response.tools if hasattr(response, 'tools') else []

                tool_count = len(tools)

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