0 Replies Latest reply on Jun 11, 2014 7:40 AM by bibhu nayak

    Accessing EJB3 through mod_cluster

    bibhu nayak Newbie

      Hi,

       

      In standalone mode i have 3 nodes out of which 2 nodes are in cluster.Node1 and Node2 have stateless EJB and Node3 has client to access the clustered EJB.

      mod_cluster loadbalancer is installed on Apache httpd server.

       

      My requirement is from node3 i will send the request to load balancer and load balancer should forward the request to either Node1 and Node2.

      Current configurations are :

      jboss-ejb-client.properties

      endpoint.name=client-endpoint

      remote.connectionprovider.create.options.org.xnio.Options.SSL_ENABLED=false

      invocation.timeout=3000

      reconnect.tasks.timeout=2000

      remote.connections=node1,node2

       

      remote.connection.node1.host=127.0.0.1

      remote.connection.node1.port=4547

      remote.connection.node1.username=test

      remote.connection.node1.password=test123

      remote.connection.node1.connect.options.org.xnio.Options.SASL_POLICY_NOANONYMOUS=false

      remote.connection.node1.connect.options.org.xnio.Options.SASL_POLICY_NOPLAINTEXT=false

      remote.connection.node1.connect.options.org.xnio.Options.SASL_DISALLOWED_MECHANISMS=${host.auth:JBOSS-LOCAL-USER}

       

       

      remote.connection.node2.host=127.0.0.1

      remote.connection.node2.port=4647

      remote.connection.node2.username=test

      remote.connection.node2.password=test123

      remote.connection.node2.connect.options.org.xnio.Options.SASL_POLICY_NOANONYMOUS=false

      remote.connection.node2.connect.options.org.xnio.Options.SASL_POLICY_NOPLAINTEXT=false

      remote.connection.node2.connect.options.org.xnio.Options.SASL_DISALLOWED_MECHANISMS=${host.auth:JBOSS-LOCAL-USER}

       

      remote.clusters=ejb

      remote.cluster.ejb.clusternode.selector=org.jboss.ejb.client.RandomClusterNodeSelector

      remote.cluster.ejb.connect.timeout=2500

      remote.cluster.ejb.max-allowed-connected-nodes=2

      remote.cluster.ejb.connect.options.org.xnio.Options.SASL_POLICY_NOANONYMOUS=false

      remote.cluster.ejb.connect.options.org.xnio.Options.SSL_ENABLED=false

      remote.cluster.ejb.username=test

      remote.cluster.ejb.password=test123

       

      Below is the code snipet used for EJBClientContext and JNDI context

       

      //setting EJBClientContext

       

      System.out.println("EJBClient context setup startrd****************************");
        Properties properties = new Properties();
        properties.put("endpoint.name", "client-endpoint");
       properties.put("remote.connectionprovider.create.options.org.xnio.Options.SSL_ENABLED", "false");
      properties.put("remote.connections", "node1");
      properties.put("remote.connection.node1.host", "127.0.0.1");
      properties.put("remote.connection.node1.port", "4547");
      //properties.put("remote.connection.node1.username", "test");
      //properties.put("remote.connection.node1.password", "test123");
      properties.put("remote.connection.node1.connect.options.org.xnio.Options.SASL_POLICY_NOANONYMOUS", "false");
      PropertiesBasedEJBClientConfiguration configuration = new PropertiesBasedEJBClientConfiguration(properties);
      final ContextSelector<EJBClientContext> ejbClientContextSelector = new ConfigBasedEJBClientContextSelector(configuration);
      final ContextSelector<EJBClientContext> previousSelector = EJBClientContext.setSelector(ejbClientContextSelector);
      System.out.println("EJBClientContext setup ended**********************************");
       //setting JNDI Context
      System.out.println("JNDI conext setup started*************************************");
      Properties jndiProperties = new Properties();
      jndiProperties.put(Context.URL_PKG_PREFIXES, "org.jboss.ejb.client.naming");
      jndiProperties.put("jboss.naming.client.ejb.context", true);
      //properties.put("remote.connection.node1.username", "test");
      //properties.put("remote.connection.node1.password", "test123");
      context = new InitialContext(jndiProperties);
      System.out.println("JNDI context setup ended****************************************");
      return context;
      

       

      And mod_cluster is listening to this IPs Listen 127.0.0.1:6666 and Listen 127.0.0.1:80.

       

      If all the 3 nodes are in cluster i am able to access EJB3 through mod_cluster.

       

      Below is the exception trace i got while accessing the client from node3

       

      09:32:52,478 ERROR [org.apache.catalina.core.ContainerBase.[jboss.web].[default-host].[/LoadBalanceEJBClient].[com.test.client.LoadBalanceServlet]] (http--127.0.0.1-8380-1) Servlet.service() for servlet com.test.client.LoadBalanceServlet threw exception: java.lang.IllegalStateException: No EJB receiver available for handling [appName:,modulename:LoadBalanceEJB,distinctname:] combination for invocation context org.jboss.ejb.client.EJBClientInvocationContext@78624930

        at org.jboss.ejb.client.EJBClientContext.requireEJBReceiver(EJBClientContext.java:584) [jboss-client.jar:7.1.1.Final]

        at org.jboss.ejb.client.ReceiverInterceptor.handleInvocation(ReceiverInterceptor.java:119) [jboss-client.jar:7.1.1.Final]

        at org.jboss.ejb.client.EJBClientInvocationContext.sendRequest(EJBClientInvocationContext.java:181) [jboss-client.jar:7.1.1.Final]

        at org.jboss.ejb.client.EJBInvocationHandler.doInvoke(EJBInvocationHandler.java:136) [jboss-client.jar:7.1.1.Final]

        at org.jboss.ejb.client.EJBInvocationHandler.doInvoke(EJBInvocationHandler.java:121) [jboss-client.jar:7.1.1.Final]

        at org.jboss.ejb.client.EJBInvocationHandler.invoke(EJBInvocationHandler.java:104) [jboss-client.jar:7.1.1.Final]

        at $Proxy35.getNodeName(Unknown Source) at com.test.client.LoadBalanceServlet.doGet(LoadBalanceServlet.java:41) [classes:]

        at javax.servlet.http.HttpServlet.service(HttpServlet.java:734) [jboss-servlet-api_3.0_spec-1.0.0.Final.jar:1.0.0.Final]

        at javax.servlet.http.HttpServlet.service(HttpServlet.java:847) [jboss-servlet-api_3.0_spec-1.0.0.Final.jar:1.0.0.Final]

        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:329) [jbossweb-7.0.13.Final.jar:]

        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:248) [jbossweb-7.0.13.Final.jar:]

        at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:275) [jbossweb-7.0.13.Final.jar:]

        at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:161) [jbossweb-7.0.13.Final.jar:]

        at org.jboss.modcluster.container.jbossweb.JBossWebContext$RequestListenerValve.event(JBossWebContext.java:67)

        at org.jboss.modcluster.container.jbossweb.JBossWebContext$RequestListenerValve.invoke(JBossWebContext.java:48)

        at org.jboss.as.web.session.ClusteredSessionValve.handleRequest(ClusteredSessionValve.java:125) [jboss-as-web-7.1.1.Final.jar:7.1.1.Final]

        at org.jboss.as.web.session.ClusteredSessionValve.invoke(ClusteredSessionValve.java:91) [jboss-as-web-7.1.1.Final.jar:7.1.1.Final]

        at org.jboss.as.web.session.JvmRouteValve.invoke(JvmRouteValve.java:88) [jboss-as-web-7.1.1.Final.jar:7.1.1.Final]

        at org.jboss.as.web.session.LockingValve.invoke(LockingValve.java:56) [jboss-as-web-7.1.1.Final.jar:7.1.1.Final]

        at org.jboss.as.web.security.SecurityContextAssociationValve.invoke(SecurityContextAssociationValve.java:153) [jboss-as-web-7.1.1.Final.jar:7.1.1.Final]

        at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:155) [jbossweb-7.0.13.Final.jar:]

        at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102) [jbossweb-7.0.13.Final.jar:]

        at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109) [jbossweb-7.0.13.Final.jar:]

        at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:368) [jbossweb-7.0.13.Final.jar:]

        at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:877) [jbossweb-7.0.13.Final.jar:]

        at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:671) [jbossweb-7.0.13.Final.jar:]

        at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:930) [jbossweb-7.0.13.Final.jar:]

        at java.lang.Thread.run(Thread.java:722) [rt.jar:1.7.0_09]

       

      Please help me in resolving the issue....