Re: Apache server returns early before process is complete

Hi Joseph,

your description is very vague, so can only answer on some assumptions:

It sounds like a timeout is fired somewhere.

Best advice in these situations: Log as many steps as you can. Keep your=
=20
eyes open on TCP/IP and higher level timeouts.

Declare only ONE instance responsible for a retry: Either the app server=
=20
calling the dispatcher with several tries or the dispatcher trying for=20
himself. Not both.

Best regards
Andreas


Am 23.04.2025 um 16:21 schrieb Joseph He:
> All, good day.
>
> Here is the issue I have.
> My entire application is running on ModPerl/Apache environment.
> I send Http::Request with data load from my App server to a dispatch=20
> server thru LWP::UserAgent, I set the timeout 600 seconds.
>
> The dispatch server is supposed to manipulate the data and send the=20
> data to an external SFTP server. Because the SFTP can fail, it will=20
> keep trying up to 4 times with 30 seconds sleep in case that SFTP=20
> connection fails.
>
> Recently, I found that I uploaded the file twice sometimes. I figured=20
> out the root cause is that my Dispatch server returns 'failure' at 6=20
> minutes while it keeps trying to do the SFTP. The App server=20
> received=C2=A0HTTP::Response with error status so it issued another call=
 to=20
> send data. It turns out I uploaded the identified file twice.
>
> Anybody has this sort of experience? Why does the dispatch=C2=A0server=
=20
> return 'error' while it still processes the data?
>
> Thanks a lot,
> Joseph
>