Problem ZK Studio 9.0.3 when close Eclipse Ide!

RmiChannelServlet::init() contextPath=/www_xxxxx_it
Mar 24, 2009 10:30:15 AM org.zkoss.zk.ui.sys.ConfigParser parseConfigXml:126
INFO: Loading system default
Mar 24, 2009 10:30:16 AM org.zkoss.zk.ui.sys.ConfigParser parse:217
INFO: Parsing file:/opt/eclipse/configuration/org.eclipse.osgi/bundles/595/1/.cp/ZKVE_FRAME/WEB-INF/zk.xml
RmiChannelServlet: init VE_PORT is: 45253
EBD<<<<RmiChannel Report: Receive INS_EBD_DISPLAY

The event processing thread stops
java.lang.NullPointerException
	at org.zkoss.zk.ui.sys.SessionsCtrl.getSession(SessionsCtrl.java:90)
	at org.zkoss.zk.ui.http.WebManager.sessionDestroyed(WebManager.java:327)
	at org.zkoss.zk.ui.http.HttpSessionListener.sessionDestroyed(HttpSessionListener.java:41)
	at org.mortbay.jetty.servlet.AbstractSessionManager.removeSession(AbstractSessionManager.java:665)
	at org.mortbay.jetty.servlet.AbstractSessionManager$Session.invalidate(AbstractSessionManager.java:938)
	at org.mortbay.jetty.servlet.HashSessionManager$Session.invalidate(HashSessionManager.java:500)
	at org.mortbay.jetty.servlet.HashSessionManager.invalidateSessions(HashSessionManager.java:312)
	at org.mortbay.jetty.servlet.AbstractSessionManager.doStop(AbstractSessionManager.java:216)
	at org.mortbay.jetty.servlet.HashSessionManager.doStop(HashSessionManager.java:93)
	at org.mortbay.component.AbstractLifeCycle.stop(AbstractLifeCycle.java:64)
	at org.mortbay.jetty.servlet.SessionHandler.doStop(SessionHandler.java:125)
	at org.mortbay.component.AbstractLifeCycle.stop(AbstractLifeCycle.java:64)
	at org.mortbay.jetty.handler.HandlerWrapper.doStop(HandlerWrapper.java:142)
	at org.mortbay.jetty.handler.ContextHandler.doStop(ContextHandler.java:569)
	at org.mortbay.jetty.webapp.WebAppContext.doStop(WebAppContext.java:485)
	at org.mortbay.component.AbstractLifeCycle.stop(AbstractLifeCycle.java:64)
	at org.zkoss.eclipse.ve.server.jetty.AJettyVeWebApplication.stop(AJettyVeWebApplication.java:101)
	at org.zkoss.eclipse.ve.server.jetty.ProjectVeWebApplication.stop(ProjectVeWebApplication.java:60)
	at org.zkoss.eclipse.ve.server.jetty.JettyEmbeddedServer.stop(JettyEmbeddedServer.java:145)
	at org.zkoss.eclipse.ve.VisualEditorPlugin.stop(VisualEditorPlugin.java:127)
	at org.eclipse.osgi.framework.internal.core.BundleContextImpl$3.run(BundleContextImpl.java:1050)
	at java.security.AccessController.doPrivileged(Native Method)
	at org.eclipse.osgi.framework.internal.core.BundleContextImpl.stop(BundleContextImpl.java:1046)
	at org.eclipse.osgi.framework.internal.core.BundleHost.stopWorker(BundleHost.java:457)
	at org.eclipse.osgi.framework.internal.core.AbstractBundle.suspend(AbstractBundle.java:531)
	at org.eclipse.osgi.framework.internal.core.Framework.suspendBundle(Framework.java:1104)
	at org.eclipse.osgi.framework.internal.core.StartLevelManager.decFWSL(StartLevelManager.java:655)
	at org.eclipse.osgi.framework.internal.core.StartLevelManager.doSetStartLevel(StartLevelManager.java:312)
	at org.eclipse.osgi.framework.internal.core.StartLevelManager.shutdown(StartLevelManager.java:257)
	at org.eclipse.osgi.framework.internal.core.SystemBundle.suspend(SystemBundle.java:236)
	at org.eclipse.osgi.framework.internal.core.Framework.shutdown(Framework.java:678)
	at org.eclipse.osgi.framework.internal.core.Framework.close(Framework.java:576)
	at org.eclipse.osgi.framework.internal.core.OSGi.close(OSGi.java:41)
	at org.eclipse.core.runtime.adaptor.EclipseStarter.shutdown(EclipseStarter.java:424)
	at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:200)
	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 org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:549)
	at org.eclipse.equinox.launcher.Main.basicRun(Main.java:504)
	at org.eclipse.equinox.launcher.Main.run(Main.java:1236)