TIdTCPServer Memory Leak

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4 total messages Started by Mark Roberts Thu, 08 Nov 2007 20:18

#692

Author: Mark Roberts
Date: Thu, 08 Nov 2007 20:18

8 lines
1169 bytes

I'm using Indy's TIdTCPServer component in C++ Builder 6.0 and getting a 
memory leak.  My client is connecting and disconnecting every 5 seconds.

Is there known issues with TIdTCPServer leaking memory?  How do I go about 
resolving this problem?

Thanks for your help,
Mark Roberts

Re: TIdTCPServer Memory Leak

#693

Author: Remy Lebeau (TeamB)
Date: Thu, 08 Nov 2007 21:03

12 lines
1324 bytes

"Mark Roberts" <markr@piracle.com> wrote in message 
news:47336f10$1@newsgroups.borland.com...

> I'm using Indy's TIdTCPServer component in C++ Builder 6.0
> and getting a memory leak.

You need to be more specific.  What is leaking exactly?  How do you know 
that it is a leak to begin with?


Gambit

Re: TIdTCPServer Memory Leak

#695

Author: Mark Roberts
Date: Fri, 09 Nov 2007 17:43

40 lines
2326 bytes

"Remy Lebeau (TeamB)" <no.spam@no.spam.com> wrote in message 
news:473379be$1@newsgroups.borland.com...
>
> "Mark Roberts" <markr@piracle.com> wrote in message 
> news:47336f10$1@newsgroups.borland.com...
>
>> I'm using Indy's TIdTCPServer component in C++ Builder 6.0
>> and getting a memory leak.
>
> You need to be more specific.  What is leaking exactly?  How do you know 
> that it is a leak to begin with?
>
>
> Gambit
>

My app is running as a service. It uses a TIdTCPServer component to 
communicate with clients. As I watch the Processes screen of the Task 
Manager I see the process continually growing as the clients connect and 
disconnect. I'm calling AThread->Connection->Disconnect in the OnExcute 
function and

AThread->StopMode = smTerminate;

AThread->Stop();

TCPServer->ThreadMgr->ReleaseThread(AThread);

TCPServer->ThreadMgr->TerminateThreads(TCPServer->ThreadMgr->ActiveThreads);

in the OnDisconnect function.

Even when I comment out all code in the OnExecute routine other than the 
ATread->Connection->Disconnect the service continues to grow. Googling 
TIdTCPServer seems to indicate that this component leaks memory but I can't 
find a solution.

Any insights would be greatly appreciated.

Mark

Re: TIdTCPServer Memory Leak

#696

Author: Remy Lebeau (TeamB)
Date: Fri, 09 Nov 2007 21:33

35 lines
2202 bytes

"Mark Roberts" <markr@piracle.com> wrote in message 
news:47349c3a$1@newsgroups.borland.com...

> As I watch the Processes screen of the Task Manager I see
> the process continually growing as the clients connect and
> disconnect.

Task Manager is a very poor way to measure leaking.  Borland/CodeGear's 
memory manager does not release freed memory back to the OS right away.  It 
is cached for later re-use.  Task Manager has no way of knowing that.  All 
it shows is how much memory is allocated to the process, but not how the 
process is actually using the memory.

> I'm calling AThread->Connection->Disconnect in the
> OnExcute function

That is fine.

> AThread->StopMode = smTerminate;
>
> AThread->Stop();
>
> TCPServer->ThreadMgr->ReleaseThread(AThread);
>
> TCPServer->ThreadMgr->TerminateThreads(TCPServer->ThreadMgr->ActiveThreads);
>
> in the OnDisconnect function.

Do not do ANY of that!  Especially NOT in the OnDisconnect event!  The 
thread is still active inside that event.  It can't be released yet.  Let 
TIdTCPServer do all of the thread management for you.


Gambit

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