Uploaded image for project: 'JBoss Enterprise Application Platform 4 and 5'
  1. JBoss Enterprise Application Platform 4 and 5
  2. JBPAPP-11155

Clustered stateful EJB proxy confusing with multiple remote bindings

XMLWordPrintable

    • Icon: Bug Bug
    • Resolution: Won't Do
    • Icon: Major Major
    • None
    • EAP_EWP 5.2.0
    • Clustering
    • None
    • Hide
      1. Extract the attachment.
      2. Deploy dist/ejb3_http_example.jar to your EAP 5.2 cluster.
      3. Run the client several times.
        java -cp $JBOSS_HOME/client/jbossall-client.jar:dist/ejb3_http_example-client.jar example.HelloClient
        It sometimes succeeds and sometimes fails. If you configure HTTP unified-invoker, it always succeeds.
      Show
      Extract the attachment. Deploy dist/ejb3_http_example.jar to your EAP 5.2 cluster. Run the client several times. java -cp $JBOSS_HOME/client/jbossall-client.jar:dist/ejb3_http_example-client.jar example.HelloClient It sometimes succeeds and sometimes fails. If you configure HTTP unified-invoker, it always succeeds.
    • Workaround Exists
    • Hide

      Define a new EJB in metadata and move over the remote binding to the newly defined EJB.

      1. add a new EJB to ejb-jar.xml
      2. remove the offending remote-binding from the other EJB
      3. add that remote-binding to the new EJB

      On the example this would mean: https://github.com/wolfc/EJB3HttpExample/commit/cc7fe5576d2dadf56d32ad8a34fecc02ab03d2ca

      Show
      Define a new EJB in metadata and move over the remote binding to the newly defined EJB. add a new EJB to ejb-jar.xml remove the offending remote-binding from the other EJB add that remote-binding to the new EJB On the example this would mean: https://github.com/wolfc/EJB3HttpExample/commit/cc7fe5576d2dadf56d32ad8a34fecc02ab03d2ca
    • NEW

      If a stateful session bean has multiple remote bindings, its proxy client sometimes uses the one that is bound to a different JNDI name.

      For example, the following jboss.xml defines Hello EJB that has 2 bindings; "myHello" for usual JNP and "Hello/http" for JNDI over HTTP.

      <jboss
  xmlns="http://www.jboss.com/xml/ns/javaee"
  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  xsi:schemaLocation="http://www.jboss.com/xml/ns/javaee
  http://www.jboss.com/j2ee/schema/jboss_5_0.xsd"
  version="3.0">
  <enterprise-beans>
    <session>
      <ejb-name>Hello</ejb-name>
      <remote-binding>
        <jndi-name>myHello</jndi-name>
      </remote-binding>
      <remote-binding>
        <jndi-name>Hello/http</jndi-name>
        <client-bind-url>
          http://${jboss.bind.address}:8080/unified-invoker/Ejb3ServerInvokerServlet/?return-exception=true
        </client-bind-url>
      </remote-binding>
    </session>
  </enterprise-beans>
</jboss>

      And its client looks up "myHello" which doesn't use HTTP.

              Hashtable<String, String> env = new Hashtable<String, String>();
        env.put(Context.INITIAL_CONTEXT_FACTORY, "org.jnp.interfaces.NamingContextFactory");
        env.put(Context.PROVIDER_URL, "localhost:1100,localhost:1200");
        env.put(Context.URL_PKG_PREFIXES, "org.jboss.naming:org.jnp.interfaces");
        InitialContext ctx = new InitialContext(env);
        Object obj = ctx.lookup("myHello");

      This lookup sometimes fails if you haven't set up http-uinvoker on your cluster.

      Exception in thread "main" javax.naming.NamingException: Could not dereference object [Root exception is java.lang.reflect.UndeclaredThrowableException]
        at org.jnp.interfaces.NamingContext.getObjectInstanceWrapFailure(NamingContext.java:1551)
        at org.jnp.interfaces.NamingContext.lookup(NamingContext.java:869)
        at org.jnp.interfaces.NamingContext.lookup(NamingContext.java:713)
        at javax.naming.InitialContext.lookup(InitialContext.java:411)
        at MyTestClient.main(MyTestClient.java:18)
Caused by: java.lang.reflect.UndeclaredThrowableException
        at com.sun.proxy.$Proxy1.createProxyBusiness(Unknown Source)
        at org.jboss.ejb3.proxy.impl.objectfactory.session.SessionProxyObjectFactory.createProxy(SessionProxyObjectFactory.java:129)
        at org.jboss.ejb3.proxy.clustered.objectfactory.session.stateful.StatefulSessionClusteredProxyObjectFactory.getProxy(StatefulSessionClusteredProxyObjectFactory.java:65)
        at org.jboss.ejb3.proxy.impl.objectfactory.ProxyObjectFactory.getObjectInstance(ProxyObjectFactory.java:161)
        at javax.naming.spi.NamingManager.getObjectInstance(NamingManager.java:321)
        at org.jnp.interfaces.NamingContext.getObjectInstance(NamingContext.java:1526)
        at org.jnp.interfaces.NamingContext.getObjectInstanceWrapFailure(NamingContext.java:1543)
        ... 4 more
Caused by: org.jboss.remoting.transport.http.WebServerError: <html><head><title>JBoss Web/2.1.13.GA-patch-01 - Error report</title><style><!--H1 {font-family:Tahoma,Arial,sans-serif;color:white;background-color:#525D76;font-size:22px;} H2 {font-family:Tahoma,Arial,sans-serif;color:white;background-color:#525D76;font-size:16px;} H3 {font-family:Tahoma,Arial,sans-serif;color:white;background-color:#525D76;font-size:14px;} BODY {font-family:Tahoma,Arial,sans-serif;color:black;background-color:white;} B {font-family:Tahoma,Arial,sans-serif;color:white;background-color:#525D76;} P {font-family:Tahoma,Arial,sans-serif;background:white;color:black;font-size:12px;}A {color : black;}A.name {color : black;}HR {color : #525D76;}--></style> </head><body><h1>HTTP Status 404 - /unified-invoker/Ejb3ServerInvokerServlet/</h1><HR size="1" noshade="noshade"><p><b>type</b> Status report</p><p><b>message</b> <u>/unified-invoker/Ejb3ServerInvokerServlet/</u></p><p><b>description</b> <u>The requested resource (/unified-invoker/Ejb3ServerInvokerServlet/) is not available.</u></p><HR size="1" noshade="noshade"><h3>JBoss Web/2.1.13.GA-patch-01</h3></body></html>
        at org.jboss.remoting.transport.http.HTTPClientInvoker.useHttpURLConnection(HTTPClientInvoker.java:497)
        at org.jboss.remoting.transport.http.HTTPClientInvoker.makeInvocation(HTTPClientInvoker.java:253)
        at org.jboss.remoting.transport.http.HTTPClientInvoker.transport(HTTPClientInvoker.java:176)
        at org.jboss.remoting.MicroRemoteClientInvoker.invoke(MicroRemoteClientInvoker.java:169)
        at org.jboss.remoting.Client.invoke(Client.java:2084)
        at org.jboss.remoting.Client.invoke(Client.java:879)
        at org.jboss.aspects.remoting.InvokeRemoteInterceptor.invoke(InvokeRemoteInterceptor.java:60)
        at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:102)
        at org.jboss.aspects.remoting.ClusterChooserInterceptor.invoke(ClusterChooserInterceptor.java:122)
        at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:102)
        at org.jboss.ejb3.proxy.impl.remoting.IsLocalProxyFactoryInterceptor.invoke(IsLocalProxyFactoryInterceptor.java:104)
        at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:102)
        at org.jboss.aspects.remoting.ClusteredPojiProxy.invoke(ClusteredPojiProxy.java:79)
        at com.sun.proxy.$Proxy1.createProxyBusiness(Unknown Source)
        at org.jboss.ejb3.proxy.impl.objectfactory.session.SessionProxyObjectFactory.createProxy(SessionProxyObjectFactory.java:129)
        at org.jboss.ejb3.proxy.clustered.objectfactory.session.stateful.StatefulSessionClusteredProxyObjectFactory.getProxy(StatefulSessionClusteredProxyObjectFactory.java:65)
        at org.jboss.ejb3.proxy.impl.objectfactory.ProxyObjectFactory.getObjectInstance(ProxyObjectFactory.java:161)
        at javax.naming.spi.NamingManager.getObjectInstance(NamingManager.java:321)
        at org.jnp.interfaces.NamingContext.getObjectInstance(NamingContext.java:1526)
        at org.jnp.interfaces.NamingContext.getObjectInstanceWrapFailure(NamingContext.java:1543)
        at org.jnp.interfaces.NamingContext.lookup(NamingContext.java:869)
        at org.jnp.interfaces.NamingContext.lookup(NamingContext.java:713)
        at javax.naming.InitialContext.lookup(InitialContext.java:411)
        at MyTestClient.main(MyTestClient.java:18)
        at org.jboss.aspects.remoting.InvokeRemoteInterceptor.invoke(InvokeRemoteInterceptor.java:72)
        at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:102)
        at org.jboss.aspects.remoting.ClusterChooserInterceptor.invoke(ClusterChooserInterceptor.java:122)
        at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:102)
        at org.jboss.ejb3.proxy.impl.remoting.IsLocalProxyFactoryInterceptor.invoke(IsLocalProxyFactoryInterceptor.java:104)
        at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:102)
        at org.jboss.aspects.remoting.ClusteredPojiProxy.invoke(ClusteredPojiProxy.java:79)
        ... 11 more

        1. EJB3HttpExample.zip
          7 kB

              rhn-engineering-cdewolf Carlo de Wolf
              rhn-support-onagano Osamu Nagano
              Votes:
              0 Vote for this issue
              Watchers:
              2 Start watching this issue

                Created:
                Updated:
                Resolved: