3.6.7.4 Begin Phase Zero

The Begin Phase Zero event MUST be signaled with the following arguments:

• An Enlistment object

If the Begin Phase Zero event is signaled, the transaction manager MUST perform the following actions:

• If the connection state is Active:

  • Send a TXUSER_PHASE0_MTAG_PHASE0REQ message using the connection of the provided enlistment.

  • Set the connection state to Awaiting Phase Zero Response.

• Otherwise:

  • Ignore the event.