Have you made the insertion into the TListView threadsafe? e.g. Synchronized or similar ?
Matt. > They display the information in a TListView set to Report style. When a > keyword is processed it is added to the list. There shouldn't be problems > with this, I've previously worked on an application that processed 60.000 > keywords and there was no problem (though there was only 1 thread there). > > Csaba > > > On Sun, 26 Nov 2006 21:26:34 +0100, Matthew Comb <[EMAIL PROTECTED]> > wrote: > >> I would be more concerned with what the threads do with the information >> they get once completed searching. >> >> e.g. displaying on main form in some way. >> >> Exceptions within a thread shouldn't propogate to the main thread unless >> im missing something? >> >> Matt. >> >>> Thanks Conor, I've added (A) and sent the application to the client, so >>> let's hope there will be some progress. >>> >>> >>> On Sun, 26 Nov 2006 20:35:38 +0100, Conor Boyd >>> <[EMAIL PROTECTED]> >>> wrote: >>> >>>> That's a very detailed email... ;-) >>>> >>>> Without delving deeper, I've a couple of comments/suggestions. >>>> >>>> A) You definitely need a try-except block in your Execute method. You >>>> must not let unhandled exceptions propagate out of a thread. Even if >>>> you only put a call to OutputDebugString in your exception handler, >>>> then >>>> that means you could use e.g. DebugView from Sysinternals to view >>>> exceptions being thrown. >>>> >>>> B) Try adding the madExcept library from www.madshi.net to your >>>> application. It should help hugely in tracking down unhandled errors >>>> like this, especially when they are happening on a remote machine. >>>> You >>>> can configure it so that in the event of an error, your program can >>>> automatically email you the error reports including call stacks, etc. >>>> >>>> C) You could also try using the URLDownloadToFile function from the >>>> URLMon unit instead. I use it in a threaded application, and it works >>>> fine for me. >>>> >>>> I don't know what you're using to access Google, but I've been using >>>> the >>>> Indy components very successfully in one of my projects. >>>> >>>> Good luck in trying your error down... >>>> >>>> HTH, >>>> >>>> Conor >>>> >>>> -----Original Message----- >>>> From: [EMAIL PROTECTED] >>>> [mailto:[EMAIL PROTECTED] >>>> On Behalf Of Gajo Csaba >>>> >>>> I wrote a multithreaded application for a client and it crashes on the >>>> client's computer, while it works ok on mine. Can someone give me a >>>> clue >>>> as to what might be the problem? >>>> >>>> The program works like this: I have two TThreadLists: one contains a >>>> list of keywords (~20000) while the other a list of proxy servers >>>> (~500). When the user clicks on the button, 21 threads are created. 1 >>>> thread directly accesses Google, enters the keyword and processes the >>>> result. The other 20 threads do the same, except they use a proxy >>>> server. >>>> >>>> OK, so each thread grabs a keyword from the list and then removes it >>>> from the list, so no one else could use it again. It tries to access >>>> the >>>> internet. If the connection fails then it means the proxy doesn't >>>> work, >>>> so it gets another proxy address from the list. No two threads ever >>>> share the same proxy. If there are no more free proxies left, the >>>> thread >>>> dies (and returns the unprocessed keyword to the list). >>>> >>>> [snip] >>>> >>>> _______________________________________________ >>>> Delphi mailing list >>>> [email protected] >>>> http://ns3.123.co.nz/mailman/listinfo/delphi >>>> >>>> >>> >>> >>> >>> -- >>> Using Opera's revolutionary e-mail client: http://www.opera.com/mail/ >>> _______________________________________________ >>> Delphi mailing list >>> [email protected] >>> http://ns3.123.co.nz/mailman/listinfo/delphi >>> >> >> >> _______________________________________________ >> Delphi mailing list >> [email protected] >> http://ns3.123.co.nz/mailman/listinfo/delphi >> >> > > > > -- > Using Opera's revolutionary e-mail client: http://www.opera.com/mail/ > _______________________________________________ > Delphi mailing list > [email protected] > http://ns3.123.co.nz/mailman/listinfo/delphi > _______________________________________________ Delphi mailing list [email protected] http://ns3.123.co.nz/mailman/listinfo/delphi
