langchain-ai/langgraph · error

Request failed, attempting reconnect to Location: {loc}

Error message

Request failed, attempting reconnect to Location: {loc}

What it means

Error "Request failed, attempting reconnect to Location: {loc}" thrown in langchain-ai/langgraph.

Source

Thrown at libs/sdk-py/langgraph_sdk/_sync/http.py:174

            if on_response:
                on_response(r)
            try:
                r.raise_for_status()
            except httpx.HTTPStatusError as e:
                body = r.read().decode()
                if sys.version_info >= (3, 11):
                    e.add_note(body)
                else:
                    logger.error(f"Error from langgraph-api: {body}", exc_info=e)
                raise e
            loc = r.headers.get("location")
            if reconnect_limit <= 0 or not loc:
                return _decode_json(r)
            _validate_reconnect_location(self.client.base_url, loc)
            try:
                return _decode_json(r)
            except httpx.HTTPError:
                warnings.warn(
                    f"Request failed, attempting reconnect to Location: {loc}",
                    stacklevel=2,
                )
                r.close()
                return self.request_reconnect(
                    loc,
                    "GET",
                    headers=request_headers,
                    # don't pass on_response so it's only called once
                    reconnect_limit=reconnect_limit - 1,
                )

    def stream(
        self,
        path: str,
        method: str,
        *,
        json: dict[str, Any] | None = None,

View on GitHub (pinned to 38031739e5)

When it happens

Trigger: Thrown at libs/sdk-py/langgraph_sdk/_sync/http.py:174 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of langchain-ai/langgraph@38031739e5 (2026-08-26). Data as JSON: /api/errors/ebd8571f53983130. Report an issue: GitHub.