// DNSMultiCast.(DNSMultiCast.java:24):

            this.jmdns = JmDNS.create();

java.lang.UnsupportedClassVersionError: Bad version number in .class file
	at java.lang.ClassLoader.defineClass1(Native Method)
	at java.lang.ClassLoader.defineClass(ClassLoader.java:620)
	at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:124)
	at java.net.URLClassLoader.defineClass(URLClassLoader.java:260)
	at java.net.URLClassLoader.access$100(URLClassLoader.java:56)
	at java.net.URLClassLoader$1.run(URLClassLoader.java:195)
	at java.security.AccessController.doPrivileged(Native Method)
	at java.net.URLClassLoader.findClass(URLClassLoader.java:188)
	at winstone.classLoader.WebappClassLoader.loadClass(WebappClassLoader.java:68)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:251)
	at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:319)
	at hudson.DNSMultiCast.(DNSMultiCast.java:24)
	at hudson.model.Hudson.(Hudson.java:628)
	at hudson.model.Hudson.(Hudson.java:545)
	at hudson.WebAppMain$2.run(WebAppMain.java:222)