3.6.5.1.2.3 Connection Disconnected
When a CONNTYPE_TXUSER_RESOURCEMANAGERINTERNAL (section 2.2.10.1.2)connection is disconnected, the transaction manager communicating with a resource manager facet MUST:
Set the connection state to Ended.
Signal the Resource Manager Down (section 3.6.7.16) event on the transaction manager communicating with a resource manager facet with the resource manager object referenced by the Connection-Specific Data field of the connection.