https://issues.apache.org/bugzilla/show_bug.cgi?id=46139





--- Comment #5 from Rainer Jung <[email protected]>  2009-04-27 01:39:40 
PST ---
Win32DisableAcceptEx fixes the problem on my test system. Disabling Sendfile
and MMap don't fix it.

I also played a bit with various interfaces and disabling drivers. I used a
normal LAN interface and disabled all drivers except for TCP/IP and also
disabled the Windows firewall. Even when configuring httpd Listen fixed on the
system address, the problem was reproducible. Then I disabled all interfaces
and used Listen to listen on localhost only. Still I got the problem. Disabling
AcceptEx fixed it in all those cases.

When disabling all interfaces and using localhost, the windows routing table
says they are usoing the "MS TCP loopback interface". I didn't find a good way
to retrieve configuration or network stack details for this interface.

There is a lot of additional network related software installed on the system
like VPN software, a VMware player, wireshark etc. So it could well be, that
parts of that influences the accept behaviour, even when I try to disable as
much of it as I'm able to.

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