Error on more than 900 concurrent connection

[Syahreza Pahlevi Ginting]

Dear All, please help..
I got this error, and when this happen, server stop.
I used Netty *3.1.5.GA* <http://www.jboss.org/netty/downloads.html> version.
This is happen when server process connection more than 900 concurrent
connection and receive new connection.
This is coding when binding.
            ChannelFactory factory =  new
NioServerSocketChannelFactory(Executors.newCachedThreadPool(),

Executors.newCachedThreadPool());//,200);
            ServerBootstrap bootstrap = new ServerBootstrap(factory);
            log.info("Start listening on " + ip + ":" + port);
            bootstrap.setPipelineFactory(new ConnPipelineFactory(this));

            bootstrap.setOption("child.tcpNoDelay", true);
            bootstrap.setOption("child.keepAlive", true);
            bootstrap.setOption("child.reuseAddress", true);
            bootstrap.setOption("child.connectTimeoutMillis", 10000);

            conData.setBootstrapSvr(bootstrap);
            // Bind and start to accept incoming connections.
            InetAddress inet = InetAddress.getByName(ip);

            Channel chn = bootstrap.bind(new InetSocketAddress(inet,port));

 This is error :

Exception in thread "pool-1-thread-1" java.lang.InternalError
        at sun.misc.URLClassPath$JarLoader.getResource(Unknown Source)
        at sun.misc.URLClassPath.getResource(Unknown Source)
        at java.net.URLClassLoader$1.run(Unknown Source)
        at java.security.AccessController.doPrivileged(Native Method)
        at java.net.URLClassLoader.findClass(Unknown Source)
        at sun.misc.Launcher$ExtClassLoader.findClass(Unknown Source)
        at java.lang.ClassLoader.loadClass(Unknown Source)
        at java.lang.ClassLoader.loadClass(Unknown Source)
        at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
        at java.lang.ClassLoader.loadClass(Unknown Source)
        at java.util.ResourceBundle$RBClassLoader.loadClass(Unknown Source)
        at java.util.ResourceBundle$Control.newBundle(Unknown Source)
        at java.util.ResourceBundle.loadBundle(Unknown Source)
        at java.util.ResourceBundle.findBundle(Unknown Source)
        at java.util.ResourceBundle.findBundle(Unknown Source)
        at java.util.ResourceBundle.getBundleImpl(Unknown Source)
        at java.util.ResourceBundle.getBundle(Unknown Source)
        at java.util.logging.Level.getLocalizedName(Unknown Source)
        at java.util.logging.SimpleFormatter.format(Unknown Source)
        at java.util.logging.StreamHandler.publish(Unknown Source)
        at java.util.logging.ConsoleHandler.publish(Unknown Source)
        at java.util.logging.Logger.log(Unknown Source)
        at java.util.logging.Logger.doLog(Unknown Source)
        at java.util.logging.Logger.logp(Unknown Source)
        at org.jboss.netty.logging.JdkLogger.warn(JdkLogger.java:86)
        at
org.jboss.netty.logging.InternalLoggerFactory$1.warn(InternalLoggerFactory.java:133)
        at
org.jboss.netty.channel.socket.nio.NioServerSocketPipelineSink$Boss.run(NioServerSocketPipelineSink.java:242)
        at
org.jboss.netty.util.ThreadRenamingRunnable.run(ThreadRenamingRunnable.java:101)
        at
org.jboss.netty.util.internal.IoWorkerRunnable.run(IoWorkerRunnable.java:46)
        at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(Unknown
Source)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown
Source)
        at java.lang.Thread.run(Unknown Source)
Caused by: java.util.zip.ZipException: error in opening zip file
        at java.util.zip.ZipFile.open(Native Method)
        at java.util.zip.ZipFile.<init>(Unknown Source)
        at java.util.jar.JarFile.<init>(Unknown Source)
        at java.util.jar.JarFile.<init>(Unknown Source)
        at sun.misc.URLClassPath$JarLoader.getJarFile(Unknown Source)
        at sun.misc.URLClassPath$JarLoader.access$600(Unknown Source)
        at sun.misc.URLClassPath$JarLoader$1.run(Unknown Source)
        at java.security.AccessController.doPrivileged(Native Method)
        at sun.misc.URLClassPath$JarLoader.ensureOpen(Unknown Source)
        ... 32 more
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