'Too many open files' exception in RedHat

[anishantony]

Hi

When i do some operations in gatein portal, After some time i can't access some portlets in it and shows following exception

2013-04-18 03:06:38,821 ERROR [org.apache.tomcat.util.net.JIoEndpoint] Socket accept failed

java.net.SocketException: Too many open files

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

    at java.net.PlainSocketImpl.accept(PlainSocketImpl.java:408)

    at java.net.ServerSocket.implAccept(ServerSocket.java:462)

    at java.net.ServerSocket.accept(ServerSocket.java:430)

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

    at org.apache.tomcat.util.net.JIoEndpoint$Acceptor.run(JIoEndpoint.java:310)

    at java.lang.Thread.run(Thread.java:662)

2013-04-18 03:06:38,821 ERROR [org.apache.tomcat.util.net.JIoEndpoint] Socket accept failed

java.net.SocketException: Too many open files

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

    at java.net.PlainSocketImpl.accept(PlainSocketImpl.java:408)

    at java.net.ServerSocket.implAccept(ServerSocket.java:462)

    at java.net.ServerSocket.accept(ServerSocket.java:430)

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

    at org.apache.tomcat.util.net.JIoEndpoint$Acceptor.run(JIoEndpoint.java:310)

    at java.lang.Thread.run(Thread.java:662).... etc

OS Version : RHEL 6

Thanks

Anish Antony

[zaouiahmed]

It is caused by  the limited number of opened files on your linux
You can try to set it to a higher value with the command:

ulimit -n 4096 

To change this value definitively the change must be done on the file /etc/security/limits.conf.

You should restart the server and check if other exceptions persists.

Best Regards,

Zaoui Ahmed