10055 Windows Error
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Socket Error 10054
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Socket Error 10053
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Socket Error Codes Linux
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Socket Error 11001
minute: Sign up Here's how it works: Anybody can ask a question Anybody can answer The best answers are voted up and rise to the top What causes winsock 10055 errors? How should I troubleshoot? up vote 5 https://msdn.microsoft.com/en-us/library/windows/desktop/ms740668(v=vs.85).aspx down vote favorite 1 I'm investigating some issues with winsock 10055 errors on a chain of custom applications (some of which we control, some not) and was hoping to get some advice on techniques to troubleshoot the problem. No buffer space available. An operation on a socket could not be performed because the system lacked sufficient buffer space or because a queue was full. From research, non-paged pool and ports seem to be the only resources which http://serverfault.com/questions/399311/what-causes-winsock-10055-errors-how-should-i-troubleshoot can cause this error. Is there another resource which might cause 10055 errors? Currently, we have perfmon counters setup on the applications and non-paged pool usage looks low in most circumstances. Open TCP connections looks low and I am unaware of another way to monitor ports. Since it only happens in production, we are unable to use more invasive counters. Though it would still be interesting to hear other solutions. I'm sure other people could use the information. Is there some other tool or procedure you would recommend to diagnose which application is causing the issue? UPDATE: The platform is windows server 2003 x86 with the /3G switch. For reference, x86 generally has 256mb of NPP storage, /3G lowers it to 128mb. In general, you'd want to avoid this configuration for avoiding NPP problems. (reference) We have source to one application. I have written pretty elaborate testing harnesses trying to reproduce the behavior to no avail. As mentioned, the problem only happens in production. As such, packet monitoring has been avoided. We currently have performance counters setup that monitors NPP, threads, network traffic, etc. Since perfmon's interval is 1sec, you could have microbursts that come and go within that window. There is somewhat subjective evidence that this isn't the problem however. The basic situation is that the other side of the connection says that it has closed the
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open new TCP/IP socket or to handle socket data. It looks like that in most cases the problem occurs when total count of opened sockets reaches some magical number. MS writes that this limit is 3976 simultaneously opened sockets but it seems that on Win9x systems the real limit is much lower. Proxy+ uses permanently about 10-20 opened sockets (it depends on configuration, number of defined Mapped Links,...) and each client request allocates two sockets - one for client side and one for server side of connection. Because TCP/IP system doesn't free sockets immediately when they are closed (socket remains allocated for 240 seconds after application closes it) it is possible that system will report WSAENOBUFS due to lack of free socket resources. Solution: There are following articles in Microsoft Knowledge base: Windows NT/2000: http://support.microsoft.com/support/kb/articles/Q196/2/71.ASP Windows 95: http://support.microsoft.com/support/kb/articles/Q170/7/91.ASP Some users reported to us there is another solution for Windows 95/98/Me which solved the problem at all. Windows 95/98/Me allows up to 100 (default value) of concurrent TCP connections. It looks like when the number of connection reaches the limit 10055 error is reported. The solution is to increase the limit of simultaneous connections. You can do it by changing/creating value of the key: HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\VxD\MSTCP\MaxConnections If you will create the MaxConnections variable key use STRING type for it (early Windows 95 used DWORD probably). Set the value to 300 for example, restart the Windows and check whether 10055 problem disappeared. There is MS Knowledge Base article which describes the meaning of MSTCP registry entries: http://support.microsoft.com/support/kb/articles/Q158/4/74.ASP Notes: You can obtain a list of opened sockets (including sockets in close state) using netstat utility: Run DOS Prompt and then type: netstat -an | more when you will press the Enter key you see a list of opened sockets (you will see big number in *_WAIT state probably). Related links: Art10000 - Error explanations - TCP/IP errors.