Establish a syncpoint.
Conditions: INVREQ, ROLLEDBACK
This command is threadsafe.
Note: The Recovery Manager processes this command on an
open TCB wherever possible to minimize TCB switching. Syncpoint processing
can take place on an open TCB for all resource types declared as threadsafe
that were accessed in the unit of work. If resource types not declared
as threadsafe were accessed in the unit of work, the Recovery Manager
switches to the QR TCB for those resource types. A CICS resource type
declares itself to the Recovery Manager as threadsafe if the EXEC
CICS commands relating to the resource type are threadsafe.
Description
SYNCPOINT divides a task (usually a long-running one) into smaller units of work. It specifies that all changes to recoverable resources made by the task since its last syncpoint are to be committed.
Note: A failure occurring during
the commit phase (phase 2) of syncpoint processing does not return
an error condition and the transaction is not abnormally terminated.
Subsequent units of work in the transaction are allowed to continue
normally. See the Unit of work recovery and abend processing for
further information.
Conditions
- 16 INVREQ
- RESP2
values:
- 200
- SYNCPOINT was in a program that is linked to from a remote system that has not specified the SYNCONRETURN option, or if it has been linked to locally and is defined with EXECUTIONSET=DPLSUBSET.
Default action: terminate the task abnormally.
- 82 ROLLEDBACK
- occurs
when a SYNCPOINT command is driven into rollback by a remote system
that is unable to commit the syncpoint. All changes made to recoverable
resources in the current unit of work are backed out.
Default action: terminate the task abnormally.
