In-Doubt Resolution - IBM IMS/DC Interface for Teradata

In-Doubt Resolution

It is possible for a failure to occur during the 2PC session during one of the following circumstances:

The communication link between the coordinator, such as IMS, and the participant, such as a Teradata DBS, is lost.

There is an IMS system crash.

A participant, such as DB2, experiences a system failure.

When the electrical power, system, or communication line is restored after a failure, the coordinator reconciles existing activity logs from the coordinator and the participants.

If the logs cannot be reconciled, then in‑doubt resolution is necessary.

There are two forms of in‑doubt resolution: automatic and manual.