例子循环10000次出错

[seewindcn]

multi_server，将client_consistenthash.go中10改成10000后测试出现错误：
error for Arith: 7*8, dial tcp 127.0.0.1:8973: bind: An operation on a socket could not be performed because the system lacked sufficient buffer space or because a queue was full.

win7 64位系统, go version go1.6 windows/amd64

[smallnest]

the Operating System runs out of memory for TCP buffers.
每个client都会建立一个到服务器的连接。你改成10000会导致windows 内存占光。建议使用处理client连接池

[seewindcn]

callServer函数里面，不是有client.Close()吗？这个循环是顺序来的，建立一个client，执行，close这个client；这样也会耗光内存？除非这个close不是马上执行的？

[smallnest]

我明天测一下，看你提供的错误似乎资源不足。

[smallnest]

你说的逻辑没错，callServer是在一个goroutine中顺序执行的。但是socket关闭后端口并不会释放，相应的端口会处于TIME_WAIT的状态，只有等待两个MSL才会释放。 这不仅仅是在Windows上的问题，Linux也有这个问题。 所以你可以把HKEY_LOCAL_MACHINE/SYSTEM/CurrentControlSet/Services/Tcpip/Parameters/TcpTimedWaitDelay改小，促使port尽快释放。

更有效的是使用client pool.只保留几个长连接。我会加上连接池的例子。

  TCP    127.0.0.1:50404        activate:8972          TIME_WAIT
  TCP    127.0.0.1:50405        activate:8972          TIME_WAIT
  TCP    127.0.0.1:50406        activate:8972          TIME_WAIT
  TCP    127.0.0.1:50407        activate:8972          TIME_WAIT
  TCP    127.0.0.1:50408        activate:8972          TIME_WAIT
  TCP    127.0.0.1:50409        activate:8972          TIME_WAIT
  TCP    127.0.0.1:50410        activate:8972          TIME_WAIT
  TCP    127.0.0.1:50411        activate:8972          TIME_WAIT
  TCP    127.0.0.1:50412        activate:8972          TIME_WAIT
  TCP    127.0.0.1:50413        activate:8972          TIME_WAIT
  TCP    127.0.0.1:50414        activate:8972          TIME_WAIT
  TCP    127.0.0.1:50415        activate:8972          TIME_WAIT
  TCP    127.0.0.1:50416        activate:8972          TIME_WAIT
  TCP    127.0.0.1:50417        activate:8972          TIME_WAIT
  TCP    127.0.0.1:50418        activate:8972          TIME_WAIT
  TCP    127.0.0.1:50419        activate:8972          TIME_WAIT
  TCP    127.0.0.1:50420        activate:8972          TIME_WAIT
  TCP    127.0.0.1:50421        activate:8972          TIME_WAIT
  TCP    127.0.0.1:50422        activate:8972          TIME_WAIT
  TCP    127.0.0.1:50423        activate:8972          TIME_WAIT

[seewindcn]

明白，是TIME_WAIT的状态，谢谢解释！