Administering automatic RECON loss notification

RECON loss notification is automatic after the IMSplex name for the RECON is specified.

Automatic RECON loss notification is activated as soon as one DBRC instance processes a RECON error. That error is immediately communicated to other DBRC instances through SCI. The DBRC instances that are notified of the RECON error issue a message (DSP1141I) indicating that they have been notified.

All DBRC instances that share a set of RECONs must also use the same IMSplex to ensure notification of RECON errors to all DBRC instances. The first use of RECON loss notification for a given set of RECONs sets the IMSplex name in the RECONs. Any subsequent attempts at RECON access using a different IMSplex or no IMSplex are rejected, and message DSP1136A is issued.

If you have ARLN active or parallel RECON access enabled, and you want to change the IMSplex associated with a set of RECONs, use the parameter IMSPLEX() | NOPLEX, which is on the CHANGE.RECON command. If any DBRC instances are active when the CHANGE.RECON IMSPLEX() | NOPLEX command is executed, the command is rejected, and message DSP1137I is issued.

Restriction: Running a DBRC job with the SCI registration exit routine enabled as a subsequent step following an IMS CTL region, DLI/SAS region, or CQS region is not supported. Review your existing jobs before enabling ARLN to ensure there are no DBRC steps after these region types.

The following list briefly summarizes the procedures to alter the IMSplex associated with a set of RECONs:

  1. Wait for all DBRC activity on the current IMSplex to cease.
  2. Submit a DBRC utility job to change the IMSplex name.
  3. Alter the IMSplex name in the user exit routine, DSPSCIX0.
  4. Ensure that the new IMSplex SCI is ready.
  5. Resume DBRC activity on the new IMSplex.
Remember: The IMSplex name in the RECON should only be changed when your SCI registration exit routine is changed to return the new IMSplex name.

To stop or reset automatic RECON loss notification, you must clear the IMSplex name. The following briefly summarizes the procedures to stop automatic RECON loss notification associated with a set of RECONs:

  1. Wait for all DBRC activity on the current IMSplex to end.
  2. Submit a DBRC utility job to change the IMSplex name.
    1. Issue the command CHANGE.RECON IMSPLEX() | NOPLEX.
      Requirement: If parallel RECON access is enabled and you intend to disable ARLN, you must disable parallel RECON access by issuing the CHANGE.RECON ACCESS(SERIAL) command prior to issuing the CHANGE.RECON NOPLEX command.
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