Unfortunately, the failure which resulted in the gateway shutting down would have occurred after this warning.
This warning indicates that a receiver within the gateway is being deleted and is failing an error check. Specifically, the receiver being deleted still has data within the internal data structures. That is unexpected but is not a fatal error.
If you have either a core file or a crash dump, you can open a support request and we could analyze the dump file.
Thanks for your reply Sherwin, I don't have any core dump file and It didn't cause any data loss , I 'll expect this error not to happen frecuently.