Re: DTAARA Lock Issue?

Well, I tested that by allocating the data area in one job and then
attempting to do an IN *LOCK in another. The IN progrgram threw a MCH5802
"Lock operation not satisfied" after 30 seconds. No indicator on the IN
statement.

As I recall, if you do not handle the error by specifying an indicator,
default error handling will kick in. Just like specifying (e) extender on
a chain - you have the responsibility to actually do something via testing
the %error() or indicator (or, doing nothing) if an error occurs.

Roger Harman
COMMON Certified Application Developer - ILE RPG on IBM i on Power








From: RPG400-L <rpg400-l-bounces@xxxxxxxxxxxx> on behalf of Charles Wilt <
charles.wilt@xxxxxxxxx>
Sent: Friday, April 14, 2017 1:38 PM
To: RPG programming on the IBM i (AS/400 and iSeries)
Subject: Re: DTAARA Lock Issue?

IIRC you need the indicator or the (E) op-code extender...and you need to
check it...

Otherwise, if it can't get a lock, you'll never know.

Charles

On Fri, Apr 14, 2017 at 2:12 PM, Roger Harman <roger.harman@xxxxxxxxxxx>
wrote:

Yeah, I've used it for a jillion years too.

There is only 1 instance of the data area on the machine.

I'm completely baffled by this.... I'm going to threw a few lines of

code

together to test the issue with/without the indicator.

Roger Harman
COMMON Certified Application Developer - ILE RPG on IBM i on Power








From: RPG400-L <rpg400-l-bounces@xxxxxxxxxxxx> on behalf of Bradley

Stone

<bvstone@xxxxxxxxx>
Sent: Friday, April 14, 2017 12:08 PM
To: RPG programming on the IBM i (AS/400 and iSeries)
Subject: Re: DTAARA Lock Issue?

I've used that process for years to get unique IDs/counters and never had
this happen. Something else had to have happened to make it work like
that.

And when I say I've done it a lot, I mean a LOT. Meaning every customer
that uses my software this happens.

Make sure there's not another data area somewhere else that it could have
grabbed from (ie, another library).

If it truly did happen, then you better call IBM. :)


Bradley V. Stone
www.bvstools.com

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On Fri, Apr 14, 2017 at 1:06 PM, Roger Harman <roger.harman@xxxxxxxxxxx>
wrote:

We had two jobs submitted for the same process - different companies.

Each (RPGLE) does an IN *LOCK of a data area for a unique identifier.
Increment and then OUT for the next use.

From the joblogs, programs were initiated .06 seconds apart

(6/100th's).

Both got the same unique ID. I can't see how this could happen.

Default

wait time (job) should be 30 seconds, I believe.

There is no error indicator on the IN. If the LOCK failed and no
indicator specified, would the fail just be ignored?

Thanks.

Roger Harman
COMMON Certified Application Developer - ILE RPG on IBM i on Power




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