3.5.5.1.1.1 Receiving a TXUSER_RESOURCEMANAGER_MTAG_DUPLICATE Message
When the resource manager receives a TXUSER_RESOURCEMANAGER_MTAG_DUPLICATE message, the resource manager MUST perform the following actions:
If the connection state is Awaiting Create Response:
Set the connection state to Ended.
Return a failure result to the higher-layer business logic.