Re: Question on QTEMP and CGI Jobs

Kevin

well, it may be understod that they share QTEMP since a call to PGMA from
user 1 and thereafter call to PGMB from user 2 running under the same
QZSRCGI
shares the same QTEMP that belongs to the QZSRCGI and not PGMA or PGMB.

PS - I don't think you uses AJAX as agressivly as I, if you fires 4-5
unnested
AJAX calls from the browser at the same time it will result in 4-5 QZSRCGI
jobs
handling the requests, in other word they aren't queued to the same QZSRCGI
job.

Remember that persistence CGI was written way before AJAX where AJAX
may run many independend sockets to the server at the same time.


On Sat, Mar 4, 2017 at 10:42 AM, Kevin Turner <kevin.turner@xxxxxxxxxxxxxx>
wrote:

So the even shorter answer to this question
"Would there be any way for two CGI calls at the same time to overlap the
QTEMP libs ?"
is
"No!"

HTH

On 4 Mar 2017, at 09:08, Kevin Turner <kevin.turner@xxxxxxxxxxxxxx>

wrote:

There is nothing special or different about QTEMP when used in a CGI

thread. It's unique to the thread/job so nothing else can touch objects in
there other than that thread. Obviously you cannot rely on storing a value
in QTEMP on one request and retrieving it in another request because
(unless you use persistent CGI) each request can go to a different thread
(with a different instance of QTEMP).

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On 4 Mar 2017, at 05:58, Richard Schoen <Richard.Schoen@xxxxxxxxxxxxxxx>

wrote:

We have an interesting scenario where a CGI job is using a data area in

QTEMP for a temp value in a web app and there appears to be a random issue
where that value gets clobbered by another job. (At least that's what we
think is happening.)

My understanding is that each CGI call is synchronous and each

thread/program active job instance has its own copy of QTEMP library so one
call on a particular CGI job thread would have to complete before it can be
re-used by another call. Or if there is only 1 CGI thread/job subsequent
calls will block until the executing call has completed.

Is my understanding of this correct ?

Would there be any way for two CGI calls at the same time to overlap

the QTEMP libs ?

Hope this makes sense.

Any thoughts appreciated.

Thanks.

Regards,

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