July 25, 2008 02:35pm pdt

1. ciuly 35,875
2. ziolko 24,597
3. SteveBay 12,400
4. rllibby 12,250
5. TheRealL... 11,100
6. dinilud 9,664
7. BdLm 9,125
8. ThievingSix 7,700
9. Geert_Gr... 7,685
10. rfwoolf 7,376
11. MerijnB 6,339
12. kretzsch... 4,332
13. Johnjces 3,550
13. CodedK 3,550
15. dMa 3,000

1. ciuly 50,275
2. dbrunton 44,853
3. ziolko 35,347
4. whatboy 26,710
5. For-Soft 22,903
6. mlmcc 21,036
7. VGR 20,669
8. scrapdog 18,098
9. rllibby 16,250
10. dinilud 15,539
11. MerijnB 14,999
12. Hypo 14,466
13. TheRealL... 13,980
14. mokule 12,975
15. BdLm 12,875

03.03.2008 at 02:32AM PST, ID: 23208915

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8.5

Socket Error 10057 - Socket not connected when running within a thread

Zones: Pascal Programming Language, TCP/IP

Tags: Borland Delphi 2006

I'm developing a multi threaded application, with each thread using a socket connection to talk to the database.

The Socket component is based upon overbyte's ICS Wsocket, which is a essentially a non-blocking socket.

Anyway, the application services database requests. It has a maximum of, say 30 threads running at the same time. As a request is received, it is queued. When the number of threads falls below the threshold, requests are taken from the queue and threads created to service them. When a thread completes a request, it terminates.

This may work perfectly for a 1000 requests or sometimes 10. The point is, occasionally I'm getting the old 10057 error - socket not connected error, as the request is sent though to the database.

This is puzzling. The SendStr is only called after the OnSessionConnected event so as far as I'm aware, socket is connected, but obviously me and the socket have differing opinions on this.

Also, the randomness of this is concerning me and so far, I've not been able to do anything to resolve it.

Any help would be greatly appreciated.

Thanks

Steve

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Question Stats

Zone: Programming

Question Asked By: steve-west

Solution Provided By: ciuly

Participating Experts: 1

Solution Grade: A

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