Hello,
In my Delphi application I am using a TROHttpServer.
I am returning a PDF using a method like this
Result := TROHttpApiResult.Create(HTTP_200_code, id_ContentType_application_pdf, ‘’, False);
When I have many requests, my application is closed.
This request can take a few seconds to be executed and in that time I receive other requests of the same type.
I think it may be something with the TROThreadPool.
How could I increase or change it to receive many requests and not close my application?
Would this be happening because of the exception that is generated by the number of threads x queue?
Thanks
EvgenyK
February 6, 2025, 8:15am
2
Hi,
You can change these properties of ROHTTPServer.ThreadPool :
You can just increase each parameter twice for testing.
–
I made this change, doubling the default values. The connection is still closed and is opened after this change.
FROServerWeb.ThreadPool.MaxQueue := 100;
After this change, the server no longer responds to requests.
Is there an additional command missing to apply these values?
EvgenyK
February 6, 2025, 12:05pm
4
Hi,
Have you applied these changes before FROServerWeb.Active := True; ?
Can you catch original error that causes closing your server with standard values of TROThreadPool properties?
Yes, see the block where I initiate these changes.
UELITON_ALVES_FUTURA:
LogInfo('Iniciando Servidor Web para o SisPetro App');
try
//StopServerWeb;
{$IFDEF SERVIDOR_INDY}1024 1024;
FROServerWeb.ThreadPool.MaxQueue := 100;
FROServerWeb.ThreadPool.MaxThreads := 20;
FROServerWeb.ThreadPool.PoolThreads := 10;
{$ENDIF}
if dados.porta > 0 then begin
FROHttpApiDispatcher.ApiHost := 'localhost:' + Trim( IntToStr(dados.Porta) );
end;
FROServerWeb.Port := dados.porta;
FROServerWeb.Active := True;
except
on E: Exception do begin
LogErro('Não foi possível iniciar o Serviço Web. Erro: ' + E.Message);
end;
end;
end;
But I still can’t capture the location of this exception. With each error, the application stops at a different point.
EvgenyK
February 6, 2025, 1:02pm
6
Hi,
post several call stacks - they should have something common.
note: You can drop email to support@ for keeping this in privacy
Ok, I’ll try to get the data to send.
But why isn’t my ThreadPool change working?
I think I need to increase my queue.
EvgenyK
February 6, 2025, 1:27pm
8
Hi,
lets see original error. it can be isn’t related to thread pool settings…
About this topic (post several call stacks) where would I get this information from since the application just closes.
Is there any procedure in TROHTTPServer or property that I can configure to log this data?
EvgenyK
February 6, 2025, 2:50pm
10
Hi,
just start your server in IDE debugger.
also 3rd party libraries like EurekaLog, madExcept, etc are present.
I have returned my application to its original point.
After 10 minutes of processing requests it is being terminated.
Below is the memory stack (3 tests)
:00c122b8 InitWndProc + $10
==================================================
:00c122b8 InitWndProc + $10
==================================================
:00c122b8 InitWndProc + $10
EvgenyK
February 7, 2025, 6:05am
12
Hi,
This error isn’t related to Remoting SDK.
