langflow-ai/langflow · error · HTTPException

{str(exc)}

Error message

{str(exc)}

What it means

Error "{str(exc)}" thrown in langflow-ai/langflow.

Source

Thrown at src/backend/base/langflow/api/v1/mappers/deployments/helpers.py:320

# ---------------------------------------------------------------------------
# Route helpers (moved from langflow.api.v1.deployments)
# ---------------------------------------------------------------------------


def deployment_pagination_params(
    page: Annotated[int, Query(ge=1)] = 1,
    size: Annotated[int, Query(ge=1, le=50)] = 20,
) -> Params:
    return Params(page=page, size=size)


def page_offset(page: int, size: int) -> int:
    return (page - 1) * size


def raise_http_for_value_error(exc: ValueError) -> None:
    status_code = status.HTTP_404_NOT_FOUND if "not found" in str(exc).lower() else status.HTTP_400_BAD_REQUEST
    raise HTTPException(status_code=status_code, detail=str(exc)) from exc


@contextmanager
def handle_adapter_errors(*, mapper: BaseDeploymentMapper | None = None):
    """Map deployment adapter exceptions to appropriate HTTP responses.

    Domain exceptions (subclasses of :class:`DeploymentServiceError`) are
    mapped via :func:`http_status_for_deployment_error` in the shared
    ``lfx.services.adapters.deployment.exceptions`` module.  Non-domain
    exceptions (``NotImplementedError``, ``ValueError``, etc.) are handled
    as special cases here.
    """
    try:
        yield
    except DeploymentServiceError as exc:
        http_status = http_status_for_deployment_error(exc)
        detail = exc.message
        if isinstance(exc, ResourceConflictError) and mapper is not None:

View on GitHub (pinned to 976ec789d2)

Solutions

1. Inspect the logged exception for the root cause and retry the deployment operation.

When it happens

Trigger: Occurs when an unexpected exception is raised in a deployment mapper helper; the exception string is surfaced.

Common situations: See trigger scenarios.

AI-assisted analysis of langflow-ai/langflow@976ec789d2 (2026-08-14). Data as JSON: /api/errors/6cc701a636a54a16. Report an issue: GitHub.