RE: DTAARA Lock Issue?

Only one instance found in *all lib.

Wait time on the job is 30 seconds.

I do like the loop idea. And, of course, specifying AND checking the indicator - which is not being done in this program.

-----Original Message-----
From: RPG400-L [mailto:rpg400-l-bounces@xxxxxxxxxxxx] On Behalf Of Stephen Coyle
Sent: Sunday, April 16, 2017 5:48 PM
To: RPG programming on the IBM i (AS/400 and iSeries)
Subject: Re: DTAARA Lock Issue?

Is there more than one BRDAT1 object in different libraries?
Maybe it's a library list issue.
Just throwing that out there.


On Sun, Apr 16, 2017 at 8:14 PM Steinmetz, Paul <PSteinmetz@xxxxxxxxxx>
wrote:

Roger,

Old and no longer used, but here was are coding.
This was an interactive job.

* NEXT ACCOUNT NUMBER
IBRDAT1 DS
I 1 70NACT#

C *IN59 DOUEQ'0'
C *LOCK IN BRDAT1 59
C END *IN59
C ADD 1 NACT#
C OUT BRDAT1

Paul

-----Original Message-----
From: RPG400-L [mailto:rpg400-l-bounces@xxxxxxxxxxxx] On Behalf Of Roger
Harman
Sent: Sunday, April 16, 2017 7:10 PM
To: RPG programming on the IBM i (AS/400 and iSeries)
Subject: RE: DTAARA Lock Issue?

Nope. The *LOCK is definitely there.

-----Original Message-----
From: RPG400-L [mailto:rpg400-l-bounces@xxxxxxxxxxxx] On Behalf Of Mark S
Waterbury
Sent: Sunday, April 16, 2017 1:41 PM
To: rpg400-l@xxxxxxxxxxxx
Subject: Re: DTAARA Lock Issue?

Roger:

Perhaps someone forgot to specify "*LOCK" on the IN statement, so you
could have something like this example:

D DataArea DS DtaAra(NextNumber)
D NextNbr 15P 0 INZ
...
C IN DataArea
C ADD 1 NextNbr
C OUT DataArea
C MOVE NextNbr Result

and thus, no protection from multiple jobs simultaneously accessing and
updating that data area. This will compile and run "just fine" and it might
even seem to "work" okay most of the time, but,when two jobs run this code
at the same time, you could experience exactly the issue you reported.

What is needed is:

C *LOCK IN DataArea
C ADD 1 NextNbr
C OUT DataArea
C MOVE NextNbr Result

Hope that helps...

Mark S. Waterbury
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