2014-06-18 10:20:29,016 WARN  info.magnolia.event.SimpleEventBus                : Exception caught when dispatching a class info.magnolia.ui.api.location.LocationChangedEvent event with class info.magnolia.ui.framework.app.AppControllerImpl eventHandler.
java.lang.NullPointerException
	at java.util.Hashtable.get(Hashtable.java:334)
	at info.magnolia.repository.WorkspaceMapping.getWorkspaceMapping(WorkspaceMapping.java:123)
	at info.magnolia.repository.DefaultRepositoryManager.getSession(DefaultRepositoryManager.java:228)
	at info.magnolia.context.DefaultRepositoryStrategy.internalGetSession(DefaultRepositoryStrategy.java:61)
	at info.magnolia.context.AbstractRepositoryStrategy.getSession(AbstractRepositoryStrategy.java:74)
	at info.magnolia.context.AbstractContext.getJCRSession(AbstractContext.java:132)
	at info.magnolia.context.MgnlContext.getJCRSession(MgnlContext.java:649)
	at info.magnolia.ui.workbench.tree.HierarchicalJcrContainer.getSession(HierarchicalJcrContainer.java:270)
	at info.magnolia.ui.workbench.tree.HierarchicalJcrContainer.getRootNode(HierarchicalJcrContainer.java:274)
	at info.magnolia.ui.workbench.tree.HierarchicalJcrContainer.getRootItemIds(HierarchicalJcrContainer.java:242)
	at info.magnolia.ui.workbench.tree.HierarchicalJcrContainer.rootItemIds(HierarchicalJcrContainer.java:114)
	at com.vaadin.ui.TreeTable$HierarchicalStrategy.getPreOrder(TreeTable.java:279)
	at com.vaadin.ui.TreeTable$HierarchicalStrategy.size(TreeTable.java:200)
	at com.vaadin.ui.TreeTable.size(TreeTable.java:577)
	at info.magnolia.ui.workbench.tree.TreeViewImpl.initializeTable(TreeViewImpl.java:93)
	at info.magnolia.ui.workbench.list.ListViewImpl.setContainer(ListViewImpl.java:189)
	at info.magnolia.ui.workbench.list.ListPresenter.start(ListPresenter.java:73)
	at info.magnolia.ui.workbench.tree.TreePresenter.start(TreePresenter.java:73)
	at info.magnolia.ui.workbench.tree.TreePresenter.start(TreePresenter.java:61)
	at info.magnolia.ui.workbench.WorkbenchPresenter.start(WorkbenchPresenter.java:107)
	at info.magnolia.ui.contentapp.browser.BrowserPresenter.start(BrowserPresenter.java:145)
	at info.magnolia.ui.contentapp.browser.BrowserSubApp.start(BrowserSubApp.java:164)
	at info.magnolia.ui.contentapp.browser.BrowserSubApp.start(BrowserSubApp.java:107)
	at info.magnolia.ui.framework.app.AppInstanceControllerImpl.startSubApp(AppInstanceControllerImpl.java:374)
	at info.magnolia.ui.framework.app.AppInstanceControllerImpl.openSubApp(AppInstanceControllerImpl.java:333)
	at info.magnolia.ui.framework.app.BaseApp.start(BaseApp.java:71)
	at info.magnolia.module.forum.app.ForumContentApp.start(ForumContentApp.java:59)
	at info.magnolia.ui.framework.app.AppInstanceControllerImpl.start(AppInstanceControllerImpl.java:219)
	at info.magnolia.ui.framework.app.AppControllerImpl.doStartIfNotAlreadyRunning(AppControllerImpl.java:257)
	at info.magnolia.ui.framework.app.AppControllerImpl.onLocationChanged(AppControllerImpl.java:337)
	at info.magnolia.ui.api.location.LocationChangedEvent.dispatch(LocationChangedEvent.java:64)
	at info.magnolia.ui.api.location.LocationChangedEvent.dispatch(LocationChangedEvent.java:42)
	at info.magnolia.event.SimpleEventBus.fireEvent(SimpleEventBus.java:78)
	at info.magnolia.ui.api.location.LocationController.goToWithoutChecks(LocationController.java:103)
	at info.magnolia.ui.api.location.LocationController.goTo(LocationController.java:97)
	at info.magnolia.ui.framework.app.AppControllerImpl.onLocationChanged(AppControllerImpl.java:328)
	at info.magnolia.ui.api.location.LocationChangedEvent.dispatch(LocationChangedEvent.java:64)
	at info.magnolia.ui.api.location.LocationChangedEvent.dispatch(LocationChangedEvent.java:42)
	at info.magnolia.event.SimpleEventBus.fireEvent(SimpleEventBus.java:78)
	at info.magnolia.ui.api.location.LocationController.goToWithoutChecks(LocationController.java:103)
	at info.magnolia.ui.api.location.LocationController.goTo(LocationController.java:97)
	at info.magnolia.ui.api.location.LocationHistoryHandler.handleFragment(LocationHistoryHandler.java:120)
	at info.magnolia.ui.api.location.LocationHistoryHandler.access$100(LocationHistoryHandler.java:49)
	at info.magnolia.ui.api.location.LocationHistoryHandler$1.onFragmentChanged(LocationHistoryHandler.java:79)
	at info.magnolia.ui.api.shell.FragmentChangedEvent.dispatch(FragmentChangedEvent.java:55)
	at info.magnolia.ui.api.shell.FragmentChangedEvent.dispatch(FragmentChangedEvent.java:41)
	at info.magnolia.event.EventHandlerCollection.dispatch(EventHandlerCollection.java:72)
	at info.magnolia.ui.framework.shell.ShellImpl$2.onFragmentChanged(ShellImpl.java:130)
	at info.magnolia.ui.vaadin.magnoliashell.MagnoliaShell.notifyOnFragmentChanged(MagnoliaShell.java:275)
	at info.magnolia.ui.framework.shell.ShellImpl.goToApp(ShellImpl.java:262)
	at info.magnolia.ui.framework.shell.ShellImpl.access$500(ShellImpl.java:78)
	at info.magnolia.ui.framework.shell.ShellImpl$2.goToApp(ShellImpl.java:150)
	at info.magnolia.ui.vaadin.magnoliashell.MagnoliaShell.goToApp(MagnoliaShell.java:131)
	at info.magnolia.ui.vaadin.magnoliashell.rpc.MagnoliaShellRpcDelegate.activateApp(MagnoliaShellRpcDelegate.java:68)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
	at java.lang.reflect.Method.invoke(Method.java:597)
	at com.vaadin.server.ServerRpcManager.applyInvocation(ServerRpcManager.java:168)
	at com.vaadin.server.ServerRpcManager.applyInvocation(ServerRpcManager.java:118)
	at com.vaadin.server.communication.ServerRpcHandler.handleBurst(ServerRpcHandler.java:214)
	at com.vaadin.server.communication.ServerRpcHandler.handleRpc(ServerRpcHandler.java:111)
	at com.vaadin.server.communication.UidlRequestHandler.synchronizedHandleRequest(UidlRequestHandler.java:91)
	at com.vaadin.server.SynchronizedRequestHandler.handleRequest(SynchronizedRequestHandler.java:37)
	at com.vaadin.server.VaadinService.handleRequest(VaadinService.java:1371)
	at com.vaadin.server.VaadinServlet.service(VaadinServlet.java:238)
	at info.magnolia.ui.admincentral.AdmincentralVaadinServlet.service(AdmincentralVaadinServlet.java:131)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
	at info.magnolia.cms.filters.ServletDispatchingFilter.doFilter(ServletDispatchingFilter.java:147)
	at info.magnolia.cms.filters.AbstractMgnlFilter.doFilter(AbstractMgnlFilter.java:90)
	at info.magnolia.cms.filters.MgnlFilterChain.doFilter(MgnlFilterChain.java:80)