parent accept can't return

[wllenyj]

运行example/http/test_http.sh
Centos 6.2
父进程start子进程后，收到子进程发送的terminated消息，在消息处理函数内close(listener)。这时子进程又收到shell脚本引起的terminated消息，子进程正常退出。但父进程的accept不能返回，无法退出。

[wllenyj]

如果使用gdb attach 上加断点后continue，accept又可以返回了。但程序还是无法退出，又阻塞在了waitGroup.Wait上，但是Counter已经是0了，感觉像是go的调度器坏了。

[wllenyj]

https://stackoverflow.com/questions/9365282/c-linux-accept-blocking-after-socket-closed

[wllenyj]

http://drmingdrmer.github.io/tech/programming/network/2015/07/28/close-shutdown.html

[wllenyj]

#6ea06a4

[wllenyj]

shutdown(3)/close(3) behaviour is incorrect for sockets in accept(3)
shutdown()/close() behaviour is incorrect for sockets in accept()

[wllenyj]

fixed in :
net: calling File leaves the socket in nonblocking mode