{"record":{"id":"a91e743cad0dc382","repo":"langchain-ai/langgraph","slug":"result-was-not-set-before-timeout","errorCode":null,"errorMessage":"Result was not set before timeout.","messagePattern":"Result was not set before timeout\\.","errorType":"exception","errorClass":"TimeoutError","httpStatus":null,"severity":"error","filePath":"libs/sdk-py/langgraph_sdk/_sync/stream.py","lineNumber":166,"sourceCode":"        self._event = threading.Event()\n        self._value: Any = None\n        self._error: BaseException | None = None\n\n    def set_result(self, value: Any) -> None:\n        if self._event.is_set():\n            return\n        self._value = value\n        self._event.set()\n\n    def set_exception(self, error: BaseException) -> None:\n        if self._event.is_set():\n            return\n        self._error = error\n        self._event.set()\n\n    def result(self, timeout: float | None = None) -> Any:\n        if not self._event.wait(timeout):\n            raise TimeoutError(\"Result was not set before timeout.\")\n        if self._error is not None:\n            raise self._error\n        return self._value\n\n    def done(self) -> bool:\n        return self._event.is_set()\n\n\nclass _SyncAgentModule:\n    \"\"\"Assistant graph helpers scoped to one sync thread stream.\"\"\"\n\n    def __init__(self, owner: SyncThreadStream) -> None:\n        self._owner = owner\n\n    def get_tree(\n        self,\n        *,\n        xray: int | bool = False,","sourceCodeStart":148,"sourceCodeEnd":184,"githubUrl":"https://github.com/langchain-ai/langgraph/blob/38031739e551638e373fb553453256c23feeb41f/libs/sdk-py/langgraph_sdk/_sync/stream.py#L148-L184","documentation":"Error \"Result was not set before timeout.\" thrown in langchain-ai/langgraph.","triggerScenarios":"Thrown at libs/sdk-py/langgraph_sdk/_sync/stream.py:166 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"}