I've implemented the simplest EventListener possible by just implementing the EventListener required methods, adding an @Component("mystartup") line and adding my class to components.txt. However, on startup I get an error Failed to lookup component [role = [org.xwiki.observation.ObservationManager] hint = [default]] What am I missing? Is this a chicken and egg problem? @Component("mystartup") public class MyStartup implements EventListener { public List<Event> getEvents() { return Arrays.asList(new ApplicationStartedEvent(), new ApplicationStoppedEvent()); } public String getName() { return "mystartup"; } public void onEvent(Event arg0, Object arg1, Object arg2) { // TODO Auto-generated method stub } java.lang.RuntimeException: Failed to find the Observation Manager component at org.xwiki.container.servlet.XWikiServletContextListener.contextInitialized(XWikiServletContextListener.java:79) at org.mortbay.jetty.handler.ContextHandler.startContext(ContextHandler.java:548) at org.mortbay.jetty.servlet.Context.startContext(Context.java:136) at org.mortbay.jetty.webapp.WebAppContext.startContext(WebAppContext.java:1239) at org.mortbay.jetty.handler.ContextHandler.doStart(ContextHandler.java:517) at org.mortbay.jetty.webapp.WebAppContext.doStart(WebAppContext.java:466) at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:50) at org.mortbay.jetty.handler.HandlerCollection.doStart(HandlerCollection.java:152) at org.mortbay.jetty.handler.ContextHandlerCollection.doStart(ContextHandlerCollection.java:156) at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:50) at org.mortbay.jetty.handler.HandlerCollection.doStart(HandlerCollection.java:152) at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:50) at org.mortbay.jetty.handler.HandlerWrapper.doStart(HandlerWrapper.java:130) at org.mortbay.jetty.Server.doStart(Server.java:224) at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:50) at org.mortbay.xml.XmlConfiguration.main(XmlConfiguration.java:985) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) at java.lang.reflect.Method.invoke(Unknown Source) at org.mortbay.start.Main.invokeMain(Main.java:194) at org.mortbay.start.Main.start(Main.java:523) at org.mortbay.start.Main.main(Main.java:119) Caused by: org.xwiki.component.manager.ComponentLookupException: Failed to lookup component [role = [org.xwiki.observation.ObservationManager] hint = [default]] at org.xwiki.component.embed.EmbeddableComponentManager.initialize(EmbeddableComponentManager.java:263) at org.xwiki.component.embed.EmbeddableComponentManager.lookup(EmbeddableComponentManager.java:93) at org.xwiki.container.servlet.XWikiServletContextListener.contextInitialized(XWikiServletContextListener.java:76) ... 22 more Caused by: java.lang.NullPointerException at org.xwiki.observation.internal.DefaultObservationManager.addListener(DefaultObservationManager.java:157) at org.xwiki.observation.internal.DefaultObservationManager.initialize(DefaultObservationManager.java:128) at org.xwiki.component.embed.EmbeddableComponentManager.createInstance(EmbeddableComponentManager.java:328) at org.xwiki.component.embed.EmbeddableComponentManager.initialize(EmbeddableComponentManager.java:254) ... 24 more