fix celery job not closed issue (#19268)

api/tasks/duplicate_document_indexing_task.py

@@ -99,6 +99,6 @@ def duplicate_document_indexing_task(dataset_id: str, document_ids: list):
     except DocumentIsPausedError as ex:
         logging.info(click.style(str(ex), fg="yellow"))
     except Exception:
-        pass
+        logging.exception("duplicate_document_indexing_task failed, dataset_id: {}".format(dataset_id))
     finally:
         db.session.close()