java.net.SocketException: Too many open files

Question

I have an application using AppFuse and mysql database

The problem is sometime the following exception is thrown :

Jan 27, 2011 4:54:56 AM org.apache.tomcat.util.net.PoolTcpEndpoint acceptSocket
SEVERE: Endpoint ServerSocket[addr=0.0.0.0/0.0.0.0,port=0,localport=8080] ignored exception: java.net.SocketException: Too many open files
java.net.SocketException: Too many open files
    at java.net.PlainSocketImpl.socketAccept(Native Method)
    at java.net.PlainSocketImpl.accept(PlainSocketImpl.java:384)
    at java.net.ServerSocket.implAccept(ServerSocket.java:453)
    at java.net.ServerSocket.accept(ServerSocket.java:421)
    at  org.apache.tomcat.util.net.DefaultServerSocketFactory.acceptSocket(DefaultServerSocketFactory.java:60)
    at org.apache.tomcat.util.net.PoolTcpEndpoint.acceptSocket(PoolTcpEndpoint.java:368)
    at org.apache.tomcat.util.net.TcpWorkerThread.runIt(PoolTcpEndpoint.java:549)
    at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:683)
    at java.lang.Thread.run(Thread.java:619)

Jan 27, 2011 4:54:56 AM org.apache.tomcat.util.net.PoolTcpEndpoint acceptSocket.

Please could any one tell me the main reason for that exception? And if that exception can lead tomcat to be shutdown ?

Thanks in Advance

Thanks a lot Nishant for your help. But if this exception can lead tomcat to be shutdown or not ?? — Ali
– Ali, Commented Feb 6, 2011 at 8:53

Joe Hanink · Accepted Answer · 2011-02-06 08:53:23Z

1

are you performing a bunch of sql statements against your db in a tight loop?

If so, make sure you do stmt.close() on each one.

answered Feb 6, 2011 at 8:53

Joe Hanink

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2 Comments

Ali Over a year ago

Thanks Joe , But is there an automated tool that can find the unclosed statements? Thanks in Advance

Joe Hanink Over a year ago

Not sure about that. Hopefully you can narrow the behavior to some region of code. Also, if your app separates data access classes into a central place, you can look there to see if it is releasing the resources.

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