3.5.5.2.2.4 Receiving a TXUSER_ENLISTMENT_MTAG_COMMITREQ Message
When the resource manager receives a TXUSER_ENLISTMENT_MTAG_COMMITREQ message, the resource manager MUST perform the following actions:
If the connection state is Awaiting Transaction Outcome:
Set the connection state to Finalizing Commit Operations.
Send a Commit Request to the higher-layer business logic.
Otherwise, the message MUST be processed as an invalid message as specified in section 3.1.6.