NIO: maximum connections reached?

Networking & Multiplayer
#1

Hi,

Im’ writing a NIO multiplayer game server which must support up to 1000 concurrent users. Currently I test the code on Windows XP Prof. SP2, and get the following exception when concurrent connections number is around 620:


java.net.SocketException: No buffer space available (maximum connections reached?): connect
      at sun.nio.ch.Net.connect(Native Method)
      at sun.nio.ch.SocketChannelImpl.connect(SocketChannelImpl.java:464)
      at java.nio.channels.SocketChannel.open(SocketChannel.java:146)
      ...

Could anybody please explain this and help to resolve the problem?

steel