How can I open more than 2000 file description at the moment? In my case, I only open about 1700 sockets at the moment? It seems I should modify some configuration,but I dont's know what to do? I'm anxious to know answer,thanks!

To change the number of file descriptors available try the following as root.

thanks you!
I'm use redhat6.2,kernel 2.2.4, it occur error:
java.net.SocketException: Too many open files
Too many open sockets. Each implementation may have a maximum number of socket handles available, either globally, per process or per thread
The server has no file handles available

I try echo 8192 > /proc/sys/fs/file-max
but no effect. Then I change the limit of
limits.h and fs.h and recompile linux, but when
exceed about 1500 threads,it kill my whole program
and display error message:
at ChatServer.g.run(Unknown Source)
"Thread-866" (TID:0x40e5ef38, sys_thread_t:0x86e0310, state:CW) prio=5
at java.net.SocketInputStream.socketRead(Native
Method)
at java.net.SocketInputStream.read(SocketInputStream.java:86)
at java.
net.SocketInputStream.read(SocketInputStream.java:67)