Getting the following exception when running the ServerStarter

Exception in thread “main” java.lang.NoClassDefFoundError: com/googlecode/concurrentlinkedhashmap/ConcurrentLinkedHashMap$Builder

at org.xmpp.packet.JID.(JID.java:68)

at org.jivesoftware.openfire.SessionManager.initialize(SessionManager.java:1271)

at org.jivesoftware.openfire.XMPPServer.initModules(XMPPServer.java:597)

at org.jivesoftware.openfire.XMPPServer.start(XMPPServer.java:485)

at org.jivesoftware.openfire.XMPPServer.(XMPPServer.java:212)

at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)

at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source)

at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source)

at java.lang.reflect.Constructor.newInstance(Unknown Source)

at java.lang.Class.newInstance0(Unknown Source)

at java.lang.Class.newInstance(Unknown Source)

at org.jivesoftware.openfire.starter.ServerStarter.start(ServerStarter.java:113)

at org.jivesoftware.openfire.starter.ServerStarter.main(ServerStarter.java:58)

Caused by: java.lang.ClassNotFoundException: com.googlecode.concurrentlinkedhashmap.ConcurrentLinkedHashMap$Builder

at java.net.URLClassLoader$1.run(Unknown Source)

at java.security.AccessController.doPrivileged(Native Method)

at java.net.URLClassLoader.findClass(Unknown Source)

at java.lang.ClassLoader.loadClass(Unknown Source)

at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)

at java.lang.ClassLoader.loadClass(Unknown Source)

… 13 more

Exception in thread “main” java.lang.NoClassDefFoundError: com/googlecode/concurrentlinkedhashmap/ConcurrentLinkedHashMap$Builder

at org.xmpp.packet.JID.(JID.java:68)

at org.jivesoftware.openfire.SessionManager.initialize(SessionManager.java:1271)

at org.jivesoftware.openfire.XMPPServer.initModules(XMPPServer.java:597)

at org.jivesoftware.openfire.XMPPServer.start(XMPPServer.java:485)

at org.jivesoftware.openfire.XMPPServer.(XMPPServer.java:212)

at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)

at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source)

at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source)

at java.lang.reflect.Constructor.newInstance(Unknown Source)

at java.lang.Class.newInstance0(Unknown Source)

at java.lang.Class.newInstance(Unknown Source)

at org.jivesoftware.openfire.starter.ServerStarter.start(ServerStarter.java:113)

at org.jivesoftware.openfire.starter.ServerStarter.main(ServerStarter.java:58)

Caused by: java.lang.ClassNotFoundException: com.googlecode.concurrentlinkedhashmap.ConcurrentLinkedHashMap$Builder

at java.net.URLClassLoader$1.run(Unknown Source)

at java.security.AccessController.doPrivileged(Native Method)

at java.net.URLClassLoader.findClass(Unknown Source)

at java.lang.ClassLoader.loadClass(Unknown Source)

at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)

at java.lang.ClassLoader.loadClass(Unknown Source)

… 13 more

Any help plz?