Error in console and server crash

Hi, mine server crash one for few hours and this is what I get in console:

Code:

15:49:18 [SEVERE]       at java.net.ServerSocket.accept(ServerSocket.java:430)
15:49:18 [SEVERE]       at net.minecraft.server.NetworkAcceptThread.run(SourceFile:36)
15:49:18 [SEVERE] java.net.SocketException: Too many open files
15:49:18 [SEVERE]       at java.net.PlainSocketImpl.socketAccept(Native Method)
15:49:18 [SEVERE]       at java.net.PlainSocketImpl.accept(PlainSocketImpl.java:408)
15:49:18 [SEVERE]       at java.net.ServerSocket.implAccept(ServerSocket.java:462)
15:49:18 [SEVERE]       at java.net.ServerSocket.accept(ServerSocket.java:430)
15:49:18 [SEVERE]       at net.minecraft.server.NetworkAcceptThread.run(SourceFile:36)
15:49:18 [SEVERE] java.net.SocketException: Too many open files
15:49:18 [SEVERE]       at java.net.PlainSocketImpl.socketAccept(Native Method)
15:49:18 [SEVERE]       at java.net.PlainSocketImpl.accept(PlainSocketImpl.java:408)
15:49:18 [SEVERE]       at java.net.ServerSocket.implAccept(ServerSocket.java:462)
15:49:18 [SEVERE]       at java.net.ServerSocket.accept(ServerSocket.java:430)
15:49:18 [SEVERE]       at net.minecraft.server.NetworkAcceptThread.run(SourceFile:36)

And than only "time out"

Help ?

 

too many open files, set the restriction to more allowed open files (although what plugin opens so many files?)
http://lj4newbies.blogspot.com/2007/04/too-many-open-files.html