ATB020E

Explanation
 The APPC active conversations threshold specified
by the  CONVMAX parameter has been exceeded. This
message is displayed either when CMACTION is set to MSGONLY on the
APPC PROC statement, or when the CMACTION keyword is omitted from
the APPC PROC statement.
 For each APPC active conversation
on the system, APPC reserves a certain amount of system storage. A
runaway transaction   program, which creates many conversations but
never deallocates them, could potentially exhaust the fixed amount
of system  storage that APPC has obtained. To inform the installation
of  such a program, APPC allows the installation to specify a  threshold
which will cause notification of such a problem.
 You can define
the APPC active conversation threshold on the  CONVMAX subparameter
of the PARM parameter of the EXEC statement in the APPC member of
SYS1.PROCLIB. The CONVMAX value is a 1- to 5-digit number indicating
the maximum APPC active conversations a single address space can have
before a  critical action console message is issued for operator intervention, if CMACTION is set to be MSGONLY or the CMACTION is
omitted from the APPC PROC statement.
 The minimum possible
value is CONVMAX=100. If you specify a value  between 1 and 99 on
the CONVMAX parameter, the system sets the  maximum APPC conversions
threshold to 100.
 The maximum possible value is CONVMAX=20000.
If you do not specify a value for CONVMAX, the system uses a default
of 2000.
 If you specify a value greater than 20000, the system
sets the  maximum APPC active conversations threshold to 20000.
 If
you specify a value of 0 (zero) then the system will not monitor the
total number of conversations for an address space,  regardless of
the quantity.
 In the message text:  num1
Address space identifier.
num2
Number of active conversations.
num3
APPC active conversations threshold.

System action
 The system continues processing.

Operator response
 Contact the system programmer to determine
further action.

System programmer response
 Investigate whether the critical
action console message is due to  a programming error in an APPC transaction
program or due to some APPC stress workload for this address space.
(A transaction program which allocates conversations but fails to
deallocate the same  results in many dangling conversations, which
could exhaust APPC storage.) If it is a programming error then cancel
the  problematic transaction program, fix it, and re-run it. If it
is  not a problem with the transaction program and also if it is normal
for the number of conversations to exceed the conversation threshold
limit for that transaction program, then consider changing the CONVMAX
parameter to a reasonably higher value such that  this message will
not appear on a regular basis and re-run the  transaction program.

Module
 ATBVSCM

Source
 APPC/MVS

Routing Code
 2

Descriptor Code
 7,11