SPS :: Apache : winnt_accept: Asynchronous AcceptEx failed

Document ID : KB000047987
Last Modified Date : 14/02/2018
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Description:

Running SPS, we often see the error:

[warn] (OS 64)The specified network name is no longer available.:
winnt_accept: Asynchronous AcceptEx failed.

How can we solve this?

Solution:

By running SPS 12.51CR00 with JDK 1.7.0_40 32bit on Windows 2008 R2 which includes Apache 2.2.22:

Apache documentation suggests that this error can be solved by setting parameter :

Win32DisableAcceptEx

By default, Apache 2.2 is using AcceptEx.

http://httpd.apache.org/docs/2.2/mod/mpm_winnt.html

Set also in Apache configuration

EnableSendfile Off
EnableMMAP off

If you run Apache 2.4, Win32DisableAcceptEx has been replaced by AcceptFilter, and you can also solve this with the following configuration :

AcceptFilter https none
AcceptFilter http none
EnableSendfile Off
EnableMMAP off

By default, Apache 2.2 delivers:

EnableSendfile On
EnableMMAP On

AcceptFilter is supported on Windows for Apache 2.4 as per documentation:

http://httpd.apache.org/docs/2.2/mod/core.html

See the note of the same description for AcceptFilter in the Apache 2.4 documentation:

http://httpd.apache.org/docs/current/mod/core.html

and default values are:

AcceptFilter http data
AcceptFilter https data