java.lang.LinkageError: loader (instance of  sun/misc/Launcher$AppClassLoader): attempted  duplicate class definition for name: "org/groovy/debug/hotswap/ResetAgent$TimestampFieldRemover"
	at java.lang.ClassLoader.defineClass1(Native Method)
	at java.lang.ClassLoader.defineClass(ClassLoader.java:763)
	at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
	at java.net.URLClassLoader.defineClass(URLClassLoader.java:467)
	at java.net.URLClassLoader.access$100(URLClassLoader.java:73)
	at java.net.URLClassLoader$1.run(URLClassLoader.java:368)
	at java.net.URLClassLoader$1.run(URLClassLoader.java:362)
	at java.security.AccessController.doPrivileged(Native Method)
	at java.net.URLClassLoader.findClass(URLClassLoader.java:361)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
	at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:335)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
	at java.lang.Class.forName0(Native Method)
	at java.lang.Class.forName(Class.java:348)
	at tigase.util.ClassUtil.getClassesFromNames(ClassUtil.java:176)
	at tigase.util.ClassUtil.getClassesFromClassPath(ClassUtil.java:133)
	at tigase.util.reflection.ClassUtilBean.initialize(ClassUtilBean.java:90)
	at tigase.server.Bootstrap.start(Bootstrap.java:288)
	at tigase.server.XMPPServer.start(XMPPServer.java:184)
	at tigase.server.XMPPServer.main(XMPPServer.java:138)