Recovering transactions after a remote IMS failure

When a remote IMS failure occurs, based on the recoverability attributes of an APPC transaction in a remote IMS, IMS recovers the transaction if it is queued for processing or is being processed in the remote IMS.

Recoverable transactions are recovered; irrecoverable transactions are not. After the transaction reaches a commit point, IMS recovers the output response message regardless of the recovery attributes of the transaction. The discardable and nondiscardable characteristics of the APPC conversation in the originating IMS have no bearing on the transaction's recoverability in the remote IMS across a remote IMS failure.

IMS recovers transactions that are en route to the remote IMS (meaning the transaction message is still en route in the local or intermediate IMS) when the remote IMS fails, regardless of the transaction's recoverability characteristics. After the failure, the remote IMS receives and processes the transactions that were en route at the time of the failure.