Hello all
We have stumbled at a very strange issue with our software that uses ICS as core for sockets. This is not the first time that it happens and has happened in different customers but it is kind of rare.. What happens is that ASyncReceive routine from TCustomWSocket hangs in Ics_ioctlsocket routine. We have installed a debug in our customers and got the following: |Running Thread: ID=4276; Parent=2992; Priority=0 | |Class=TServiceThread; Name= (Vcl.SvcMgr.TServiceThread.Execute) | |DeadLock=0; Wait Chain= | |Comment= | |--------------------------------------------------------------------------- ---------------------------------------------------------------------------- -----------------------------------------------------| |7FFFFFFE|03 |00000000|76F1F911|ntdll.dll |0001F911|ntdll | |ZwDeviceIoControlFile | | |00000020|03 |05EFF7A4|767830A1|WS2_32.dll |000030A1|WS2_32 | |ioctlsocket | | |00000020|04 |05EFF7D0|00810CC7|Server.exe |00410CC7|OverbyteIcsWinsock | |Ics_ioctlsocket |1177[3] | |00000020|04 |05EFF7F0|008241B4|Server.exe |004241B4|OverbyteIcsWSocket |TCustomWSocket |ASyncReceive |7071[30] | |00000020|03 |05EFF84C|75E20810|KERNELBASE.dll|00010810|KERNELBASE | |WaitForSingleObjectEx | | |00000020|04 |05EFFC2C|00824292|Server.exe |00424292|OverbyteIcsWSocket |TCustomWSocket |Do_FD_READ |7104[5] | |00000020|04 |05EFFC3C|0082442F|Server.exe |0042442F|OverbyteIcsWSocket |TCustomWSocket |WMASyncSelect |7254[20] | |00000020|04 |05EFFC50|00822D1A|Server.exe |00422D1A|OverbyteIcsWSocket |TCustomWSocket |WndProc |6181[4] | |00000020|04 |05EFFC74|00832A00|Server.exe |00432A00|OverbyteIcsWSocket |TCustomHttpTunnelWSocket |WndProc |19157[9] | |00000020|04 |05EFFC8C|0082EF5C|Server.exe |0042EF5C|OverbyteIcsWSocket |TCustomLineWSocket |WndProc |10944[12] | |00000020|04 |05EFFCA4|0081A9CA|Server.exe |0041A9CA|OverbyteIcsWndControl |TIcsWndHandler |WndProc |1133[6] | |00000020|04 |05EFFCCC|00819C82|Server.exe |00419C82|OverbyteIcsWndControl | |WndControlWindowsProc |466[30] | |00000020|03 |05EFFD1C|76146D35|USER32.dll |00016D35|USER32 | |(possible GetThreadDesktop+210) | | |00000020|03 |05EFFD94|761477BF|USER32.dll |000177BF|USER32 | |(possible CharPrevW+307) | | |00000020|03 |05EFFDF4|76147885|USER32.dll |00017885|USER32 | |DispatchMessageW | | |00000020|03 |05EFFE04|00641F04|Server.exe |00241F04|Vcl.SvcMgr |TServiceThread |ProcessRequests | | |00000020|03 |05EFFE68|00641BB5|Server.exe |00241BB5|Vcl.SvcMgr |TServiceThread |Execute | | |00000020|03 |05EFFEEC|004CDC9E|Server.exe |000CDC9E|System.Classes | |ThreadProc | | |00000020|03 |05EFFF1C|0040A008|Server.exe |0000A008|System | |ThreadWrapper | | |00000020|04 |05EFFF30|00650AA2|Server.exe |00250AA2|EExceptionManager | |DefaultThreadHandleException |2852[5] | |00000020|04 |05EFFF78|00553423|Server.exe |00153423|EThreadsManager | |ThreadWrapper |611[11] | |00000020|03 |05EFFF8C|75FD33C8|kernel32.dll |000133C8|kernel32 | |BaseThreadInitThunk | | |7FFFFFFE|03 |00000000|00641AA8|Server.exe |00241AA8|Vcl.SvcMgr |TServiceThread |Create | | |--------------------------------------------------------------------------- ---------------------------------------------------------------------------- -----------------------------------------------------| What I can see from here is that it is hang in ZwDeviceIoControlFile routine from ntdll that was called from ioctlsocket which was called by ICS. In this debug that was captured, the main thread is hang because that is where this specific socket is running, but we have found this issue in another part of our system that actually runs the socket in a separated thread, then, just that thread would hang >From what I could tell, that must be something related to Operating System, maybe a faulty driver or update that was done because our software was running for over 2 years in 2 different servers and suddenly on December 15/16 it started crashing (hanging), but BOTH servers started doing it.. which could make me eliminate a hardware issue with the server Does anybody has any ideas on why on earth ioctlsocket would hang when passing FIONREAD parameter that is what ASyncReceive does?? The recent customer who reported this error is running Windows 7 Professional Thanks!! Eric Fleming Bonilha Digifort -- To unsubscribe or change your settings for TWSocket mailing list please goto http://lists.elists.org/cgi-bin/mailman/listinfo/twsocket Visit our website at http://www.overbyte.be
