Clustered EJB3 Client Proxy

[redchili]

I'm deploying a @clustered annotated ejb3 application on my cluster but when I turn off the jboss node that the client is currently connected to the application is not switching to the other node. It still tries to connect to the (dead) node on port 3873 again and again.

From the documentation I understand that there is not much more than the annotation needed for the EJB. The client app should try to connect to the client proxy and seamlessly fail over.

Since this isn't the case I wonder where and how I could configure/check the client proxy. The docs talk about jboss.xml in the client.jar but I'm missing examples there. Also standardjboss.xml contains lots of client-proxy configurations but how would those be used?

I'm on JBoss 4.2.0GA

Thanks,
Reinhard

[redchili]

Here is the exception I get on the client when turning off a node in the cluster (namely the one the client uses):

SEVERE: Exception thrown

org.jboss.remoting.CannotConnectException: Can not get connection to server. Problem establishing socket connection for InvokerLocator [socket://xxx.xxx.xxx.151:3873/]

 at org.jboss.remoting.transport.socket.MicroSocketClientInvoker.transport(MicroSocketClientInvoker.java:530)

 at org.jboss.remoting.MicroRemoteClientInvoker.invoke(MicroRemoteClientInvoker.java:122)

 at org.jboss.remoting.Client.invoke(Client.java:1550)

 at org.jboss.remoting.Client.invoke(Client.java:530)

 at org.jboss.aspects.remoting.InvokeRemoteInterceptor.invoke(InvokeRemoteInterceptor.java:62)

 at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)

 at org.jboss.aspects.tx.ClientTxPropagationInterceptor.invoke(ClientTxPropagationInterceptor.java:61)

 at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)

 at org.jboss.aspects.security.SecurityClientInterceptor.invoke(SecurityClientInterceptor.java:53)

 at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)

 at org.jboss.ejb3.remoting.IsLocalInterceptor.invoke(IsLocalInterceptor.java:72)

 at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)

 at org.jboss.ejb3.stateless.StatelessRemoteProxy.invoke(StatelessRemoteProxy.java:103)

 at $Proxy64.find(Unknown Source)

 at at.jku.kusss.guifw.entitymanager.domain.ClientEntityManager.find(ClientEntityManager.java:297)

 at at.jku.kusss.guifw.widget.LookupEntityListModel.fillItems(LookupEntityListModel.java:269)

 at at.jku.kusss.guifw.widget.LookupEntityListModel.<init>(LookupEntityListModel.java:79)

 at at.jku.kusss.guifw.widget.LookupEntityListModel.<init>(LookupEntityListModel.java:91)

 at at.jku.kusss.guifw.widget.LookupEntityComboBox2$LookupEntityComboBoxModel.<init>(LookupEntityComboBox2.java:168)

 at at.jku.kusss.guifw.widget.LookupEntityComboBox2.<init>(LookupEntityComboBox2.java:53)

 at at.jku.kusss.gui.contactmngt.city.CitySearchPanel.initComponents(CitySearchPanel.java:71)

 at at.jku.kusss.gui.contactmngt.city.CitySearchPanel.<init>(CitySearchPanel.java:48)

 at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)

 at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source)

 at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source)

 at java.lang.reflect.Constructor.newInstance(Unknown Source)

 at java.lang.Class.newInstance0(Unknown Source)

 at java.lang.Class.newInstance(Unknown Source)

 at com.eea.fw.client.gui.ClientFactory.getSearchPanel(ClientFactory.java:187)

 at com.eea.fw.client.gui.window.SearchInternalFrame.setTypes(SearchInternalFrame.java:63)

 at com.eea.fw.client.gui.window.SearchInternalFrame.setObjectType(SearchInternalFrame.java:52)

 at com.eea.fw.client.gui.WindowFactory.createBaseSearchWindow(WindowFactory.java:187)

 at com.eea.fw.client.gui.WindowFactory.createManageSearchWindow(WindowFactory.java:214)

 at at.jku.kusss.gui.contactmngt.ContactModule$1.dlgActionPerformed(ContactModule.java:59)

 at at.jku.kusss.gui.menu.MenuTree$MenuTreeSelectionListener.valueChanged(MenuTree.java:302)

 at javax.swing.JTree.fireValueChanged(Unknown Source)

 at javax.swing.JTree$TreeSelectionRedirector.valueChanged(Unknown Source)

 at javax.swing.tree.DefaultTreeSelectionModel.fireValueChanged(Unknown Source)

 at javax.swing.tree.DefaultTreeSelectionModel.notifyPathChange(Unknown Source)

 at javax.swing.tree.DefaultTreeSelectionModel.setSelectionPaths(Unknown Source)

 at javax.swing.tree.DefaultTreeSelectionModel.setSelectionPath(Unknown Source)

 at javax.swing.JTree.setSelectionPath(Unknown Source)

 at javax.swing.plaf.basic.BasicTreeUI.selectPathForEvent(Unknown Source)

 at javax.swing.plaf.basic.BasicTreeUI$Handler.handleSelectionImpl(Unknown Source)

 at javax.swing.plaf.basic.BasicTreeUI$Handler.handleSelection(Unknown Source)

 at javax.swing.plaf.basic.BasicTreeUI$Handler.mousePressed(Unknown Source)

 at java.awt.AWTEventMulticaster.mousePressed(Unknown Source)

 at java.awt.AWTEventMulticaster.mousePressed(Unknown Source)

 at java.awt.Component.processMouseEvent(Unknown Source)

 at javax.swing.JComponent.processMouseEvent(Unknown Source)

 at java.awt.Component.processEvent(Unknown Source)

 at java.awt.Container.processEvent(Unknown Source)

 at java.awt.Component.dispatchEventImpl(Unknown Source)

 at java.awt.Container.dispatchEventImpl(Unknown Source)

 at java.awt.Component.dispatchEvent(Unknown Source)

 at java.awt.LightweightDispatcher.retargetMouseEvent(Unknown Source)

 at java.awt.LightweightDispatcher.processMouseEvent(Unknown Source)

 at java.awt.LightweightDispatcher.dispatchEvent(Unknown Source)

 at java.awt.Container.dispatchEventImpl(Unknown Source)

 at java.awt.Window.dispatchEventImpl(Unknown Source)

 at java.awt.Component.dispatchEvent(Unknown Source)

 at java.awt.EventQueue.dispatchEvent(Unknown Source)

 at java.awt.EventDispatchThread.pumpOneEventForHierarchy(Unknown Source)

 at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source)

 at java.awt.EventDispatchThread.pumpEvents(Unknown Source)

 at java.awt.EventDispatchThread.pumpEvents(Unknown Source)

 at java.awt.EventDispatchThread.run(Unknown Source)

I see a StatelessRemoteProxy and I guess this should be some ClusteredStatelessRemoteProxy?

[brian.stansberry]

Yes, it should be StatelessClusteredProxy. The fact that it's not tells me there is some issue with properly marking the SLSB as @Clustered.

[brian.stansberry]

Also, the standard-jboss.xml stuff is for EJB2, not EJB3.

[redchili]

Also, the standard-jboss.xml stuff is for EJB2, not EJB3.

Thought so....thanks

After searching the source code of this application I found out that the developers didn't annotate all of the EJBs right. Easy to say: "it's their fault" :-)

Question: is it possible to annotate those EBJs in the jboss.xml?

[brian.stansberry]

Yes; just add

<clustered>true</clustered>

.