The client calls are made from a ThreadPool thread (initiated by QueueUserWorkItem).
Just to be clear - are you saying that a thread which initiates BeginSend successfully (i.e. no exceptions and CompletedSynchronously == false) must not terminate until the EndSend is received? Surely the EndSend will be returned on a ThreadPool (completion) thread? >Any chance the thread that initiated the BeginSend is ending before the >callback is received? This can happen if you're using a home-grown >thread pool. The system ThreadPool has special logic to ensure a thread >is never destroyed if there are pending IOCP requests. > >Rick > >-----Original Message----- >From: Unmoderated discussion of advanced .NET topics. >[mailto:[EMAIL PROTECTED] On Behalf Of Garry Barclay >Sent: Wednesday, July 21, 2004 5:10 AM >To: [EMAIL PROTECTED] >Subject: [ADVANCED-DOTNET] Missing callbacks from asynchronous sockets? > >It appears that we are NOT receiving the (completion port) callback from >an asynchronous socket (BeginSend/EndSend) call. > >The sockets are clients and the failure seems to be related to shutdowns >on the socket. > >This has the effect of leaving a pinned GCHandle on the heap (pinning >the >send buffer). We've checked the process memory dump with WinDbg and have >seen that the sockets are shutdown successfully. Checking the Socket >class >implementation (v1.1) with Reflector it's seems clear that IF the >callback >is made then the buffer should always be unpinned. > >We've added in static counters using interlocked.xxx to verify that the >calls are definitely not reaching our code, and this confirms our >suspicions. > >Because of the pinned buffers, heap compaction can't take place and we >end >up with high memory usage figures even though most of the heap is free >space between those buffers. > >Anyone seen something like this before? > >=================================== >This list is hosted by DevelopMentor(r) http://www.develop.com >Some .NET courses you may be interested in: > >NEW! Guerrilla ASP.NET, 17 May 2004, in Los Angeles >http://www.develop.com/courses/gaspdotnetls > >View archives and manage your subscription(s) at >http://discuss.develop.com > >=================================== >This list is hosted by DevelopMentorŪ http://www.develop.com >Some .NET courses you may be interested in: > >NEW! Guerrilla ASP.NET, 17 May 2004, in Los Angeles >http://www.develop.com/courses/gaspdotnetls > >View archives and manage your subscription(s) at http://discuss.develop.com =================================== This list is hosted by DevelopMentorŪ http://www.develop.com Some .NET courses you may be interested in: NEW! Guerrilla ASP.NET, 17 May 2004, in Los Angeles http://www.develop.com/courses/gaspdotnetls View archives and manage your subscription(s) at http://discuss.develop.com
