JBOSS java.net.SocketException: Too many open files

While user trying move more than 1 gb to webtop or more this kind of error ocuured in Jboss server.

java.net.SocketException: Too many open files

at java.net.PlainSocketImpl.socketAccept(Native Method)

at java.net.AbstractPlainSocketImpl.accept(AbstractPlainSocketImpl.java:396)

at java.net.ServerSocket.implAccept(ServerSocket.java:522)

at java.net.ServerSocket.accept(ServerSocket.java:490)

at org.apache.tomcat.util.net.DefaultServerSocketFactory.acceptSocket(DefaultServerSocketFactory.java:61)

at org.apache.tomcat.util.net.JIoEndpoint$Acceptor.run(JIoEndpoint.java:309)

at java.lang.Thread.run(Thread.java:722)

We had experienced the similar error on RHEL 5 under moderate load.

It appeared that default max open files limit is just 1024 which is too low.

Check: ulimit -n

Fix for current session: ulimit -n 102400

Persistent fix: echo yourusername - nofile 102400 >>/etc/security/limits.conf and restart session