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Procedure for failed non-RLS mode forward recovery operation
If you are not successful in applying all the forward recovery log data to a restored
backup, you are forced to abandon the forward recovery, and revert to your most
recent full backup.
However, during its recovery processing, CICS assumes that it is operating on a
data set that has been correctly forward recovered, as in the case of recovery of a
data set accessed in RLS mode (see “Procedure for failed RLS mode forward
recovery operation” on page 198).
If you are not able to complete forward recovery on a data set, ensure that all CICS
regions tidy up any pending recovery processing on the data set (as described
below) before you restore the backup copy from which you intend to work. You
can do this in the following way:
1. Make sure that any CICS regions that are not running, and which could have
updated the data set, are restarted to enable emergency restart processing to
drive outstanding backouts.
2. If there are shunted indoubt units of work, try to resolve the in-doubts before
proceeding to the next step. This is because the indoubt units of work may
have updated resources other than the failed data set, and you don’t want to
corrupt these other resources.
3. In all CICS regions that could have updated the failed data set:
v Force shunted indoubt units of work using set DSNAME(...)
UOWACTION(COMMIT | BACKOUT | FORCE).
Before issuing the next command, wait until the SET DSNAME(...)
UOWACTION has completed against all shunted indoubt units of work.
v Reset locks for backout-failed units of work using SET DSNAME(...)
RESETLOCKS.
Do not issue this command until the previous UOWACTION command has
completed. RESETLOCKS operates only on backout-failed units of work, and
does not affect units of work that are in the process of being backed out. If
you issue RESETLOCKS too soon, and shunted indoubt units of work fail
during backout, the data set will be left with recovery work pending.
4. Finally, when you are sure that all CICS regions have completed any recovery
work for the data set, restore the backup.
If you do not follow this sequence of operations, the restored backup could be
corrupted by CICS backout operations.
Chapter 17. Forward recovery procedures 201