Debunking error (OS 10054) core_output_filter: writing data to the network

One of our customers has Apache logs (Xampp-based) full of this line:

[Tue Mar 02 16:21:41 2010] [info] [client 172.20.99.16] (OS 10054)Une connexion existante a dû être fermée par l’hôte distant.  : core_output_filter: writing data to the network

Sometimes (OS10053) is used as a variant, but the Apache error seems to be the same (core_output_filter: writing data to the network)

Apparently, the error is widespread and only occurs on Windows operating system (that’s where OS10054 error code comes from) and a few useful references for this are:

  • http://httpd.apache.org/docs/2.0/faq/error.html#error.acceptex (recommending to set EnableSendfile Apache’s directive to Off)
  • http://msdn.microsoft.com/en-us/library/ms740668%28v=VS.85%29.aspx (explaining the OS error is when a socket connection is not closed properly)
  • the problem does not seem to come from the programming language nor the application itself, as you can guess through http://bugs.php.net/32176

The same application running on a Linux box does not generate any core_output_filter error.

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