User exit and task relationships shows
whether each exit is executed in the Controller, the Tracker, or in
a batch program. Tracker exits are run also in the Controller if the
Controller has an Event Writer task; that is, if EWTRTASK(YES) is
specified in OPCOPTS.
Table 2. User exit and task relationships
Subsystem
Task
0
1
2
3
4
5
6
7
9
11
JCL
JVAR
AR
DP
AV
SAZ
All
System Task Dispatcher
X
Controller
Automatic Recovery
S
S
S
S
Controller
Event Manager
S
S
S
Controller
External Router
X
Controller
General Service
S
S
S
S
S
S
Controller
Normal Mode Manager
S
S
S
Controller
Workstation Analyzer
S
S
S
S
S
S
S
S
Trackers/ Controller
Event Writer
X
Trackers/ Controller
Job Completion Checker
X
X
Batch
Daily Planning
X
PIF
AD Validation
X
Notes:
The S mark means that the execution in the part of the
task where the exit is run is subject to serialization. The X mark
implies that there is no serialization.
When a task operates on a resource, it holds it exclusively. Normally
the resource is the current plan. While the task is updating the current
plan, no other task can reference the current plan at the same time.
An exit should avoid processing, such as I/O operations, that
may result in system waits and must not perform requests to the HCL Workload Automation for Z program
interface.
Termination of the Job Completion Checker exits (EQQUX005 and
EQQUX006) precludes the ending of the connected job.
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