{"record":{"id":"dbf3604140ff38ef","repo":"langchain-ai/langgraph","slug":"err","errorCode":null,"errorMessage":"{err}","messagePattern":"\\{err\\}","errorType":"exception","errorClass":"HostBackendError","httpStatus":null,"severity":"error","filePath":"libs/cli/langgraph_cli/host_backend.py","lineNumber":62,"sourceCode":"\n    def _request(\n        self,\n        method: str,\n        path: str,\n        payload: dict[str, Any] | None = None,\n        params: dict[str, Any] | None = None,\n    ) -> Any:\n        try:\n            resp = self._client.request(method, path, json=payload, params=params)\n            resp.raise_for_status()\n        except httpx.HTTPStatusError as err:\n            detail = err.response.text or str(err.response.status_code)\n            raise HostBackendError(\n                f\"{method} {path} failed with status {err.response.status_code}: {detail}\",\n                status_code=err.response.status_code,\n            ) from None\n        except httpx.TransportError as err:\n            raise HostBackendError(str(err)) from None\n\n        if not resp.content:\n            return None\n        try:\n            return resp.json()\n        except ValueError as err:\n            raise HostBackendError(\n                f\"Failed to decode response from {path}: {err}\"\n            ) from None\n\n    def create_deployment(\n        self,\n        name: str,\n        deployment_type: str,\n        source: str,\n        config_path: str | None = None,\n        secrets: list[dict[str, str]] | None = None,\n    ) -> dict[str, Any]:","sourceCodeStart":44,"sourceCodeEnd":80,"githubUrl":"https://github.com/langchain-ai/langgraph/blob/38031739e551638e373fb553453256c23feeb41f/libs/cli/langgraph_cli/host_backend.py#L44-L80","documentation":"Error \"{err}\" thrown in langchain-ai/langgraph.","triggerScenarios":"Thrown at libs/cli/langgraph_cli/host_backend.py:62 when the library encounters an invalid state.","commonSituations":"See trigger scenarios.","solutions":[],"exampleFix":null,"handlingStrategy":null,"validationCode":null,"typeGuard":null,"tryCatchPattern":null,"preventionTips":[],"tags":[],"backgroundTag":null,"analyzedSha":"38031739e551638e373fb553453256c23feeb41f","analyzedAt":"2026-08-26T18:02:49.312Z","schemaVersion":2},"datasetVersion":"2026-08-26T21:11:00.512Z"}