I'm seeing the following NPE on the client when connecting my ROP client after upgrading from 4.0.M2 to M3:
Apr 08, 2016 1:11:38 PM org.apache.cayenne.remote.hessian.HessianConnection connect INFO: Connecting to [system:*******@http://localhost:8080/vidval/cws] - dedicated session. Apr 08, 2016 1:11:39 PM org.apache.cayenne.remote.hessian.HessianConnection connect INFO: Error establishing remote session. URL - http://localhost:8080/vidval/cws java.lang.NullPointerException at com.caucho.hessian.client.HessianURLConnectionFactory.open(HessianURLConnectionFactory.java:90) at org.apache.cayenne.remote.hessian.HessianURLConnectionFactory.open(HessianURLConnectionFactory.java:39) at com.caucho.hessian.client.HessianProxy.sendRequest(HessianProxy.java:270) at com.caucho.hessian.client.HessianProxy.invoke(HessianProxy.java:171) at com.sun.proxy.$Proxy5.establishSession(Unknown Source) at org.apache.cayenne.remote.hessian.HessianConnection.connect(HessianConnection.java:246) at org.apache.cayenne.remote.hessian.HessianConnection.beforeSendMessage(HessianConnection.java:164) at org.apache.cayenne.remote.BaseConnection.sendMessage(BaseConnection.java:55) at org.apache.cayenne.remote.ClientChannel.send(ClientChannel.java:326) at org.apache.cayenne.remote.ClientChannel.getEntityResolver(ClientChannel.java:282) at org.apache.cayenne.BaseContext.attachToChannel(BaseContext.java:177) at org.apache.cayenne.CayenneContext.attachToChannel(CayenneContext.java:85) at org.apache.cayenne.CayenneContext.<init>(CayenneContext.java:76) at org.apache.cayenne.CayenneContext.<init>(CayenneContext.java:65) at com.valsphere.vidval.client.cayenne.CayenneContextWrapper.<init>(CayenneContextWrapper.java:14) at com.valsphere.vidval.client.Client$1.onSubmit(Client.java:105) at com.valsphere.vidval.client.gui.GuiLogin$4.actionPerformed(GuiLogin.java:125) at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:2018) at javax.swing.AbstractButton$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 com.alee.managers.hotkey.ButtonHotkeyRunnable.run(ButtonHotkeyRunnable.java:47) at com.alee.utils.SwingUtils.invokeLater(SwingUtils.java:2672) at com.alee.managers.hotkey.HotkeyManager.processHotkey(HotkeyManager.java:314) at com.alee.managers.hotkey.HotkeyManager.processHotkeys(HotkeyManager.java:266) at com.alee.managers.hotkey.HotkeyManager$3.eventDispatched(HotkeyManager.java:162) at java.awt.Toolkit$SelectiveAWTEventListener.eventDispatched(Toolkit.java:2444) at java.awt.Toolkit$ToolkitEventMulticaster.eventDispatched(Toolkit.java:2335) at java.awt.Toolkit$ToolkitEventMulticaster.eventDispatched(Toolkit.java:2335) at java.awt.Toolkit$ToolkitEventMulticaster.eventDispatched(Toolkit.java:2335) at java.awt.Toolkit$ToolkitEventMulticaster.eventDispatched(Toolkit.java:2335) at java.awt.Toolkit.notifyAWTEventListeners(Toolkit.java:2294) at java.awt.Component.dispatchEventImpl(Component.java:4768) at java.awt.Container.dispatchEventImpl(Container.java:2287) at java.awt.Component.dispatchEvent(Component.java:4698) at java.awt.KeyboardFocusManager.redispatchEvent(KeyboardFocusManager.java:1887) at java.awt.DefaultKeyboardFocusManager.dispatchKeyEvent(DefaultKeyboardFocusManager.java:762) at java.awt.DefaultKeyboardFocusManager.preDispatchKeyEvent(DefaultKeyboardFocusManager.java:1027) at java.awt.DefaultKeyboardFocusManager.typeAheadAssertions(DefaultKeyboardFocusManager.java:899) at java.awt.DefaultKeyboardFocusManager.dispatchEvent(DefaultKeyboardFocusManager.java:727) at java.awt.Component.dispatchEventImpl(Component.java:4742) at java.awt.Container.dispatchEventImpl(Container.java:2287) at java.awt.Window.dispatchEventImpl(Window.java:2719) at java.awt.Component.dispatchEvent(Component.java:4698) at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:735) at java.awt.EventQueue.access$200(EventQueue.java:103) at java.awt.EventQueue$3.run(EventQueue.java:694) at java.awt.EventQueue$3.run(EventQueue.java:692) 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:708) at java.awt.EventQueue$4.run(EventQueue.java:706) at java.security.AccessController.doPrivileged(Native Method) at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:76) at java.awt.EventQueue.dispatchEvent(EventQueue.java:705) at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:242) at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:161) at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:154) at java.awt.WaitDispatchSupport$2.run(WaitDispatchSupport.java:182) at java.awt.WaitDispatchSupport$4.run(WaitDispatchSupport.java:221) at java.security.AccessController.doPrivileged(Native Method) at java.awt.WaitDispatchSupport.enter(WaitDispatchSupport.java:219) at java.awt.Dialog.show(Dialog.java:1082) at java.awt.Component.show(Component.java:1655) at java.awt.Component.setVisible(Component.java:1607) at java.awt.Window.setVisible(Window.java:1014) at java.awt.Dialog.setVisible(Dialog.java:1005) at com.valsphere.vidval.client.gui.GuiLogin.<init>(GuiLogin.java:181) at com.valsphere.vidval.client.Client.initPriv(Client.java:94) at com.valsphere.vidval.client.Client.initialize(Client.java:73) at com.valsphere.vidval.client.gui.GuiMain.doLogin(GuiMain.java:128) at com.valsphere.vidval.client.Main$1.run(Main.java:56) at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:312) at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:733) at java.awt.EventQueue.access$200(EventQueue.java:103) at java.awt.EventQueue$3.run(EventQueue.java:694) at java.awt.EventQueue$3.run(EventQueue.java:692) at java.security.AccessController.doPrivileged(Native Method) at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:76) at java.awt.EventQueue.dispatchEvent(EventQueue.java:703) 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) My code looks like this and was working well in 4.0.M2: connection = new HessianConnection(host, userId, String.copyValueOf(password), null); channel = new ClientChannel(connection, false, null, true); setContext(new CayenneContextWrapper(channel)); The server console is not reporting any exceptions. I checked http://localhost:8080/vidval/cws in my browser and was able to login with BASIC auth and see the "Hessian Requires POST" message, so not sure what's going on. -Adam
