langgenius/dify · error · InternalServerError

Internal Server Error

Error message

Internal Server Error

What it means

Error "Internal Server Error" thrown in langgenius/dify.

Source

Thrown at api/controllers/console/app/completion.py:202

            raise NotFound("Conversation Not Exists.")
        except services.errors.conversation.ConversationCompletedError:
            raise ConversationCompletedError()
        except services.errors.app_model_config.AppModelConfigBrokenError:
            logger.exception("App model config broken.")
            raise AppUnavailableError()
        except ProviderTokenNotInitError as ex:
            raise ProviderNotInitializeError(ex.description)
        except QuotaExceededError:
            raise ProviderQuotaExceededError()
        except ModelCurrentlyNotSupportError:
            raise ProviderModelCurrentlyNotSupportError()
        except InvokeError as e:
            raise CompletionRequestError(e.description)
        except ValueError as e:
            raise e
        except Exception as e:
            logger.exception("internal server error.")
            raise InternalServerError()


@console_ns.route("/apps/<uuid:app_id>/completion-messages/<string:task_id>/stop")
class CompletionMessageStopApi(Resource):
    @console_ns.doc("stop_completion_message")
    @console_ns.doc(description="Stop a running completion message generation")
    @console_ns.doc(params={"app_id": "Application ID", "task_id": "Task ID to stop"})
    @console_ns.response(200, "Task stopped successfully", console_ns.models[SimpleResultResponse.__name__])
    @setup_required
    @login_required
    @account_initialization_required
    @with_current_user_id
    @get_app_model(mode=AppMode.COMPLETION)
    def post(self, current_user_id: str, app_model: App, task_id: str):

        AppTaskService.stop_task(
            task_id=task_id,
            invoke_from=InvokeFrom.DEBUGGER,

View on GitHub (pinned to ef8544b173)

When it happens

Trigger: Thrown at api/controllers/console/app/completion.py:202 when the library encounters an invalid state.

Common situations: See trigger scenarios.

Understand the failure class

• HTTP status errors: handling 4xx and 5xx responses — how to handle 4xx and 5xx responses properly.

AI-assisted analysis of langgenius/dify@ef8544b173 (2026-08-12). Data as JSON: /api/errors/c9f66df3d7d3f4a8. Report an issue: GitHub.