If the coordinator or any participants experiences a failure, automatic in-doubt resolution will occur once the communication between the coordinator and the participants is reestablished.
The coordinator automatically resolves the participant’s in-doubt units of recovery listed in the IMS transient journal, without any manual intervention.
However, if a participant has additional in-doubt units of recovery in its log, the participant will not resolve them until it receives instructions to do so from the coordinator or another authorized source (see Manual In-Doubt Resolution).