Feedback callback failures due to no rows in database should be requeued to guard against database registration race conditions

Author: tieneupin

src/murfey/server/feedback.py

@@ -25,6 +25,7 @@
 from sqlalchemy import func
 from sqlalchemy.exc import (
     InvalidRequestError,
+    NoResultFound,
     OperationalError,
     PendingRollbackError,
     SQLAlchemyError,
@@ -2189,6 +2190,12 @@ def feedback_callback(header: dict, message: dict, _db=murfey_db) -> None:
         time.sleep(1)
         if murfey.server._transport_object:
             murfey.server._transport_object.transport.nack(header, requeue=True)
+    except NoResultFound:
+        # Missing rows might be due to a race condition and should be requeued
+        logger.warning("No matching database row was found", exc_info=True)
+        time.sleep(1)
+        if murfey.server._transport_object:
+            murfey.server._transport_object.transport.nack(header, requeue=True)
     except Exception:
         logger.warning(
             "Exception encountered in server RabbitMQ callback", exc_info=True