Gary

If you update the PPT entry for your server jobstep program to NOCANCEL, then 
you can consider moving the ownership of that PC-cp to the server.

Rob

From: IBM Mainframe Discussion List <[email protected]> On Behalf Of 
Gary Weinhold
Sent: 28 March 2021 05:58
To: [email protected]
Subject: Re: Abend S052-104

EXTERNAL EMAIL



Rob Scott wrote (snipped):

> From the description of the abend, if your user code runs as a jobstep in 
> something like a JES initiator, you will always be at risk from a prior batch 
> job performing an LXRES for PC-ss (without an initiator restart).
...

> Is there any reason why your user-ASID owned PC-cp cannot be owned by your 
> server-ASID ?
>
> The load module would have to be in LPA/common but could probably execute 
> exactly the same code as it does today.

and Peter Relson wrote (snipped):

> One case would be a multi-step started task (or initiated job) where the
> first step did so, and there is a second step.
> Don't do that.

Thanks, Peter and Rob.  This was a  batch job and we do not know all the
preceding job steps (we only know the prior step was IDCAMS). We know
our product can be run in multiple steps in the same job. Your responses
will enable us to help the customer research the preceding steps to the
abend in the address space.  The resolution may be as simple as changing
the job class for this job (or the cross-memory job step).  According to
the customer, this happens once in a while and rerunning the job works.

It was set up this way when we decided we had to add a PC to our product
20 years ago.  I believe the programmer was afraid that a customer could
accidentally cancel the server started task and cause all running
instances of our product to abend (which could include CICS and IMS/TM
regions, batch jobs and a shared dataspace).  He figured this technique
would only prevent new instances of our product from starting and
wouldn't be as big a problem for the customer to recover from.

Gary


Gary Weinhold
Senior Application Architect
DATAKINETICS | Data Performance & Optimization
Phone:+1.613.523.5500 x216
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