mrt 11, 2017 1:28:04 AM org.apache.catalina.core.StandardContext listenerStop
SEVERE: Exception sending context destroyed event to listener instance of class websocket.drawboard.DrawboardContextListener
java.lang.NoClassDefFoundError: javax/websocket/Endpoint
        at java.lang.ClassLoader.defineClass1(Native Method)
        at java.lang.ClassLoader.defineClass(ClassLoader.java:763)
        at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
        at org.apache.catalina.loader.WebappClassLoader.findClassInternal(WebappClassLoader.java:2966)
        at org.apache.catalina.loader.WebappClassLoader.findClass(WebappClassLoader.java:1209)
        at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1689)
        at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1570)
        at websocket.drawboard.DrawboardContextListener.contextDestroyed(DrawboardContextListener.java:32)
        at org.apache.catalina.core.StandardContext.listenerStop(StandardContext.java:5051)
        at org.apache.catalina.core.StandardContext.stopInternal(StandardContext.java:5696)
        at org.apache.catalina.util.LifecycleBase.stop(LifecycleBase.java:232)
        at org.apache.catalina.core.ContainerBase$StopChild.call(ContainerBase.java:1575)
        at org.apache.catalina.core.ContainerBase$StopChild.call(ContainerBase.java:1564)
        at java.util.concurrent.FutureTask.run(FutureTask.java:266)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
        at java.lang.Thread.run(Thread.java:745)
Caused by: java.lang.ClassNotFoundException: javax.websocket.Endpoint
        at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1719)
        at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1570)
        ... 17 more

mrt 11, 2017 1:28:04 AM org.apache.catalina.core.ApplicationContext log
INFO: SessionListener: contextDestroyed()
mrt 11, 2017 1:28:04 AM org.apache.catalina.core.ApplicationContext log
INFO: ContextListener: contextDestroyed()
Mar 11, 2017 1:28:14 AM org.apache.catalina.core.ApplicationContext log
INFO: ContextListener: contextInitialized()
Mar 11, 2017 1:28:14 AM org.apache.catalina.core.ApplicationContext log
INFO: SessionListener: contextInitialized()
Mar 11, 2017 1:28:14 AM org.apache.catalina.core.ApplicationContext log