CentOS 5.3 kurulu serverda apache mina ile ilgili olarak aşağıdaki sorun görüntüleniyor. Bu hata kullanıcıların bağlanmasını engelliyor. Nasıl çözebilirim?

java.lang.NullPointerException
Exception in thread "Thread-1" java.lang.InternalError
	at sun.misc.URLClassPath$JarLoader.getResource(URLClassPath.java:769)
	at sun.misc.URLClassPath.getResource(URLClassPath.java:185)
	at java.net.URLClassLoader$1.run(URLClassLoader.java:209)
	at java.security.AccessController.doPrivileged(Native Method)
	at java.net.URLClassLoader.findClass(URLClassLoader.java:205)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:319)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:312)
	at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:294)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:264)
	at java.util.ResourceBundle$RBClassLoader.loadClass(ResourceBundle.java:463)
	at java.util.ResourceBundle$Control.newBundle(ResourceBundle.java:2401)
	at java.util.ResourceBundle.loadBundle(ResourceBundle.java:1424)
	at java.util.ResourceBundle.findBundle(ResourceBundle.java:1383)
	at java.util.ResourceBundle.findBundle(ResourceBundle.java:1310)
	at java.util.ResourceBundle.getBundleImpl(ResourceBundle.java:1252)
	at java.util.ResourceBundle.getBundle(ResourceBundle.java:733)
	at java.util.logging.Level.getLocalizedName(Level.java:240)
	at java.util.logging.SimpleFormatter.format(SimpleFormatter.java:86)
	at java.util.logging.StreamHandler.publish(StreamHandler.java:196)
	at java.util.logging.ConsoleHandler.publish(ConsoleHandler.java:105)
	at java.util.logging.Logger.log(Logger.java:476)
	at org.slf4j.impl.JDK14LoggerAdapter.log(JDK14LoggerAdapter.java:587)
	at org.slf4j.impl.JDK14LoggerAdapter.warn(JDK14LoggerAdapter.java:465)
	at org.apache.mina.common.support.DefaultExceptionMonitor.exceptionCaught(DefaultExceptionMonitor.java:43)
	at org.apache.mina.transport.socket.nio.SocketAcceptor$Worker.run(SocketAcceptor.java:249)
	at org.apache.mina.util.NamePreservingRunnable.run(NamePreservingRunnable.java:51)
	at java.lang.Thread.run(Thread.java:636)
Caused by: java.util.zip.ZipException: error in opening zip file
	at java.util.zip.ZipFile.open(Native Method)
	at java.util.zip.ZipFile.<init>(ZipFile.java:131)
	at java.util.jar.JarFile.<init>(JarFile.java:150)
	at java.util.jar.JarFile.<init>(JarFile.java:87)
	at sun.misc.URLClassPath$JarLoader.getJarFile(URLClassPath.java:660)
	at sun.misc.URLClassPath$JarLoader.access$600(URLClassPath.java:555)
	at sun.misc.URLClassPath$JarLoader$1.run(URLClassPath.java:622)
	at java.security.AccessController.doPrivileged(Native Method)
	at sun.misc.URLClassPath$JarLoader.ensureOpen(URLClassPath.java:614)
	at sun.misc.URLClassPath$JarLoader.getResource(URLClassPath.java:767)