SwingUI Error when User Log out

Create Error Scenario :

1. user login
2. user choose File menu --> log out menu item

stack trace :
Connection Error (1000) - The connector failed to connect to the server
at org.restlet.resource.ClientResource.doError(ClientResource.java:612)
at org.restlet.resource.ClientResource.handleInbound(ClientResource.java:1202)
at org.restlet.resource.ClientResource.handle(ClientResource.java:1069)
at org.restlet.resource.ClientResource.handle(ClientResource.java:1044)
at org.restlet.resource.ClientResource.handle(ClientResource.java:950)
at org.restlet.resource.ClientResource.get(ClientResource.java:658)
at org.adempiere.client.StatusInterface.getDateVersion(StatusInterface.java:64)
at org.compiere.db.CConnection.isAppsServerOK(CConnection.java:362)
at org.compiere.db.CConnectionEditor.setDisplay(CConnectionEditor.java:211)
at org.compiere.db.CConnectionEditor.setValue(CConnectionEditor.java:179)
at org.compiere.apps.ALogin.initLogin(ALogin.java:468)
at org.compiere.apps.AMenu.initSystem(AMenu.java:276)
at org.compiere.apps.AMenu.<init>(AMenu.java:122)
at org.compiere.apps.AEnv.logout(AEnv.java:730)
at org.compiere.apps.AMenu.logout(AMenu.java:561)
at org.compiere.apps.AEnv.actionPerformed(AEnv.java:470)
at org.compiere.apps.AMenu.actionPerformed(AMenu.java:629)
at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:2018)
at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2341)
at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:402)
at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:259)
at javax.swing.AbstractButton.doClick(AbstractButton.java:376)
at javax.swing.plaf.basic.BasicMenuItemUI.doClick(BasicMenuItemUI.java:833)
at javax.swing.plaf.basic.BasicMenuItemUI$Handler.mouseReleased(BasicMenuItemUI.java:877)
at java.awt.Component.processMouseEvent(Component.java:6516)
at javax.swing.JComponent.processMouseEvent(JComponent.java:3321)
at java.awt.Component.processEvent(Component.java:6281)
at java.awt.Container.processEvent(Container.java:2229)
at java.awt.Component.dispatchEventImpl(Component.java:4872)
at java.awt.Container.dispatchEventImpl(Container.java:2287)
at java.awt.Component.dispatchEvent(Component.java:4698)
at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4832)
at java.awt.LightweightDispatcher.processMouseEvent(Container.java:4492)
at java.awt.LightweightDispatcher.dispatchEvent(Container.java:4422)
at java.awt.Container.dispatchEventImpl(Container.java:2273)
at java.awt.Window.dispatchEventImpl(Window.java:2719)
at java.awt.Component.dispatchEvent(Component.java:4698)
at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:747)
at java.awt.EventQueue.access$300(EventQueue.java:103)
at java.awt.EventQueue$3.run(EventQueue.java:706)
at java.awt.EventQueue$3.run(EventQueue.java:704)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:76)
at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:87)
at java.awt.EventQueue$4.run(EventQueue.java:720)
at java.awt.EventQueue$4.run(EventQueue.java:718)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:76)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:717)
at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:242)
at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:161)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:150)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:146)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:138)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:91)
Caused by: java.net.ConnectException: Connection refused: connect
at java.net.DualStackPlainSocketImpl.connect0(Native Method)
at java.net.DualStackPlainSocketImpl.socketConnect(DualStackPlainSocketImpl.java:79)
at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:339)
at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:200)
at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:182)
at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:172)
at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
at java.net.Socket.connect(Socket.java:579)
at sun.security.ssl.SSLSocketImpl.connect(SSLSocketImpl.java:625)
at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
at sun.net.www.http.HttpClient.openServer(HttpClient.java:432)
at sun.net.www.http.HttpClient.openServer(HttpClient.java:527)
at sun.net.www.protocol.https.HttpsClient.<init>(HttpsClient.java:264)
at sun.net.www.protocol.https.HttpsClient.New(HttpsClient.java:367)
at sun.net.www.protocol.https.AbstractDelegateHttpsURLConnection.getNewHttpClient(AbstractDelegateHttpsURLConnection.java:191)
at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:933)
at sun.net.www.protocol.https.AbstractDelegateHttpsURLConnection.connect(AbstractDelegateHttpsURLConnection.java:177)
at sun.net.www.protocol.https.HttpsURLConnectionImpl.connect(HttpsURLConnectionImpl.java:153)
at org.restlet.ext.net.internal.HttpUrlConnectionCall.sendRequest(HttpUrlConnectionCall.java:366)
at org.restlet.engine.adapter.ClientAdapter.commit(ClientAdapter.java:114)
at org.restlet.engine.adapter.HttpClientHelper.handle(HttpClientHelper.java:112)
at org.restlet.Client.handle(Client.java:180)
at org.restlet.resource.ClientResource.handle(ClientResource.java:1136)
at org.restlet.resource.ClientResource.retry(ClientResource.java:1610)
at org.restlet.resource.ClientResource.handle(ClientResource.java:1171)
at org.restlet.resource.ClientResource.retry(ClientResource.java:1610)
at org.restlet.resource.ClientResource.handle(ClientResource.java:1171)
at org.restlet.resource.ClientResource.handleOutbound(ClientResource.java:1225)
at org.restlet.resource.ClientResource.handle(ClientResource.java:1068)
... 52 more