AcceptEx() is a Microsoft WinSock v2 API that provides some performance improvements over the use of the BSD style accept() API in certain circumstances. Some popular Windows products, typically virus scanning or virtual private network packages, have bugs that interfere with the proper operation of AcceptEx(). If you encounter an error condition like:
[error] (730038)An operation was attempted on something that is not a socket.: winnt_accept: AcceptEx failed. Attempting to recover.
you should use this directive to disable the use of AcceptEx().
主要是說這 AcceptEx() 是 Microsoft WinSock v2 API 一組提升網路效率 API 中的指令。而且在 Windows 上似乎蠻有可能出問題的。
註:可能為了效能還是預設為開啟 AcceptEx()
如果無預警的發生問題,我猜可能是 Windows Update 或是防火牆、防毒軟體更新了某些網路原件,造成 Microsoft WinSock v2 API 動作不正常,這時可以把這個功能先給關掉。