feat: Add traceback to fastapi exception handler logs (#4099)

Add traceback to fastapi exception handler logs

src/backend/base/langflow/api/v1/endpoints.py

@@ -76,7 +76,6 @@ async def get_all(
             )
 
     except Exception as exc:
-        logger.exception(exc)
         raise HTTPException(status_code=500, detail=str(exc)) from exc
 
 
@@ -277,13 +276,10 @@ async def simplified_run_flow(
             raise HTTPException(status_code=status.HTTP_400_BAD_REQUEST, detail=str(exc)) from exc
         if "not found" in str(exc):
             raise HTTPException(status_code=status.HTTP_404_NOT_FOUND, detail=str(exc)) from exc
-        logger.exception(exc)
         raise APIException(status_code=status.HTTP_500_INTERNAL_SERVER_ERROR, exception=exc, flow=flow) from exc
     except InvalidChatInputException as exc:
-        logger.exception(exc)
         raise HTTPException(status_code=status.HTTP_400_BAD_REQUEST, detail=str(exc)) from exc
     except Exception as exc:
-        logger.exception(exc)
         background_tasks.add_task(
             telemetry_service.log_package_run,
             RunPayload(
@@ -371,7 +367,6 @@ async def webhook_run_flow(
         )
         if "Flow ID is required" in str(exc) or "Request body is empty" in str(exc):
             raise HTTPException(status_code=400, detail=str(exc)) from exc
-        logger.exception(exc)
         raise HTTPException(status_code=500, detail=str(exc)) from exc
 
 
@@ -486,10 +481,8 @@ async def experimental_run_flow(
         if f"Session {session_id} not found" in str(exc):
             logger.exception(f"Session {session_id} not found")
             raise HTTPException(status_code=status.HTTP_404_NOT_FOUND, detail=str(exc)) from exc
-        logger.exception(exc)
         raise HTTPException(status_code=status.HTTP_500_INTERNAL_SERVER_ERROR, detail=str(exc)) from exc
     except Exception as exc:
-        logger.exception(exc)
         raise HTTPException(status_code=status.HTTP_500_INTERNAL_SERVER_ERROR, detail=str(exc)) from exc
 
 
@@ -650,7 +643,6 @@ async def custom_component_update(
 
         return component_node
     except Exception as exc:
-        logger.exception(exc)
         raise HTTPException(status_code=400, detail=str(exc)) from exc
 
 
@@ -662,5 +654,4 @@ def get_config():
         settings_service: SettingsService = get_settings_service()
         return settings_service.settings.model_dump()
     except Exception as exc:
-        logger.exception(exc)
         raise HTTPException(status_code=500, detail=str(exc)) from exc

src/backend/base/langflow/api/v1/flows.py

@@ -358,7 +358,6 @@ async def delete_multiple_flows(
         db.commit()
         return {"deleted": len(flows_to_delete)}
     except Exception as exc:
-        logger.exception(exc)
         raise HTTPException(status_code=500, detail=str(exc)) from exc
 
 

src/backend/base/langflow/api/v1/starter_projects.py

@@ -1,5 +1,4 @@
 from fastapi import APIRouter, Depends, HTTPException
-from loguru import logger
 
 from langflow.graph.graph.schema import GraphDump
 from langflow.services.auth.utils import get_current_active_user
@@ -19,5 +18,4 @@ def get_starter_projects(
     try:
         return get_starter_projects_dump()
     except Exception as exc:
-        logger.exception(exc)
         raise HTTPException(status_code=500, detail=str(exc)) from exc

src/backend/base/langflow/api/v1/validate.py

@@ -44,5 +44,4 @@ def post_validate_prompt(prompt_request: ValidatePromptRequest):
             frontend_node=prompt_request.frontend_node,
         )
     except Exception as e:
-        logger.exception(e)
         raise HTTPException(status_code=500, detail=str(e)) from e

src/backend/base/langflow/base/prompts/api_utils.py

@@ -174,7 +174,6 @@ def add_new_variables_to_template(input_variables, custom_fields, template, name
                 custom_fields[name].append(variable)
 
         except Exception as exc:
-            logger.exception(exc)
             raise HTTPException(status_code=500, detail=str(exc)) from exc
 
 
@@ -190,7 +189,6 @@ def remove_old_variables_from_template(old_custom_fields, input_variables, custo
                 template.pop(variable, None)
 
             except Exception as exc:
-                logger.exception(exc)
                 raise HTTPException(status_code=500, detail=str(exc)) from exc
 
 

src/backend/base/langflow/graph/graph/base.py

@@ -1035,7 +1035,6 @@ class Graph:
         except KeyError as exc:
             logger.exception(exc)
             if "nodes" not in payload and "edges" not in payload:
-                logger.exception(exc)
                 msg = f"Invalid payload. Expected keys 'nodes' and 'edges'. Found {list(payload.keys())}"
                 raise ValueError(msg) from exc
 

src/backend/base/langflow/main.py

@@ -208,12 +208,12 @@ def create_app():
     @app.exception_handler(Exception)
     async def exception_handler(request: Request, exc: Exception):
         if isinstance(exc, HTTPException):
-            logger.error(f"HTTPException: {exc.detail}")
+            logger.error(f"HTTPException: {exc}", exc_info=exc)
             return JSONResponse(
                 status_code=exc.status_code,
                 content={"message": str(exc.detail)},
             )
-        logger.error(f"unhandled error: {exc}")
+        logger.error(f"unhandled error: {exc}", exc_info=exc)
         return JSONResponse(
             status_code=HTTPStatus.INTERNAL_SERVER_ERROR,
             content={"message": str(exc)},