Exit XXDFB
The XXDFB exit is invoked when a message is received from the active CICS indicating that the connection to DBCTL failed.
- When invoked
- By the alternate CICS® when it receives a message from the active CICS indicating that connection to DBCTL has failed. The alternate and active CICS systems are running in different MVS™ images, perhaps in different central processing complexes (CPCs). More information about these exits, see Overview of Database Control (DBCTL).
- Exit-specific parameters
-
- UEPDBXR
- Address of CICS XRF information for use with DBCTL. The CICS XRF information can be mapped using the DSECT DFHDXUEP.
- Return codes
-
- UERCNOAC
- Take no action.
- UERCSWCH
- Switch to the alternate DBCTL.
- UERCABNO
- Abend CICS without a dump.
- UERCABDU
- Abend CICS with a dump.
- XPI calls
- The following must not be used:
- INQUIRE_MONITORING_DATA
- MONITOR
- TRANSACTION_DUMP
- WRITE_JOURNAL_DATA.