On Thursday, August 26, 2021 at 4:34:43 AM UTC-7 david....@gmail.com wrote:
> Version
>
> 2.18.5-stable+timestamp.2019.04.08.04.22.03
> (Running on Microsoft-IIS/10.0, Python 3.6.8)
>
> Hello,
>
> We have been using web2py for a couple of years with very few issues, but
> lately we have been getting *Internal Server Error 500 *error messages
> when certain scripts are called. These scripts due some relatively heavy
> processing.
>
Are these scripts running outside of web2py or as modules within the
application? ("Scripts" has so many connotations that it is a good idea
to be more specific)
If the scripts are outside, can they be launched as independent processes?
If they are modules, can you use the scheduler to run them? With either
of those and a long-running processing job, I'd invoke the job from the
page (link) that you use now, but instead of waiting for the results just
return a link to a page with the results. This gives the user quick
feedback that the system has accepted the request, but the two-step process
adds a little extra time without screwing with your timeouts, but as
processing time increases you can have the 2nd link respond with "busy"
until it isn't. If you don't like the user to actually have to click that
second link, you can experiment with the LOAD() apparatus, which also
allows you to display a busy icon.
> I am not sure if this is related to web2py or purely a server, resource or
> network problem but I thought that someone here may have had similar issues
> and can recommend some configuration change to remedy this.
>
> Kind Regards,
>
> David
>
You haven't sketched a lot of context, I've taken a stab at an answer
based on my workflows, some of which were learned here 5 or more years
ago. One place where I've used the above technique was in discovering
certain types of work nodes, which involved sending queries over the network
I've done other processing where a file is chewed upon for certain
keywords; with the link being used to upload the file for processing. The
application says "thank you, got it", schedules the processing, and returns
HTTP 200. The processing, when it completes, sends email telling the
Interested Parties where the report is.
/dps
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