If invocation of a service component rolls back on the machine running the HCSC server, and the rollback count (message delivery frequency) reaches the maximum, the message is moved to the dead message queue. The message is also moved to the dead message queue if no limit is set for the delivery frequency.

For the mechanism of transiting to the dead message queue when an error occurs, see 7.7.4 Troubleshooting when executing MDB (DB queue) in the Service Platform Setup and Operation Guide.