3 Replies Latest reply on Apr 3, 2007 3:06 AM by warrenc5

Problems with loolup of EJBs using JNDI

ashw.kumar May 22, 2006 9:13 AM

Hi,

I am getting following error while i am trying to lookup ejb.

Could not dereference object [Root exception is javax.naming.NameNotFoundException: ejb not bound]

I am using following code for lookup in a Sevlet.

try {
Context context = new InitialContext();

Object ref = context.lookup("java:/comp/env/ejb/MapSession");
home = (MapSessionHome) PortableRemoteObject.narrow(ref, MapSessionHome.class);
} catch (Exception e) {
e.printStackTrace();
throw new ServletException("look up of java:/comp/env/ejb/MapSession failed",e);
}

Following is ejb-jar.xml.

<enterprise-beans>


<session >
<description><![CDATA[Description for MapSession]]></description>
<display-name>Name for MapSession</display-name>

<ejb-name>MapSession</ejb-name>

<home>com.virtualcityindia.ejbs.MapSessionHome</home>
<remote>com.virtualcityindia.ejbs.MapSession</remote>
<ejb-class>com.virtualcityindia.ejbs.MapSessionSession</ejb-class>
<session-type>Stateless</session-type>
<transaction-type>Container</transaction-type>

</session>

</enterprise-beans>

Following is the jboss.xml file:

<jboss>

<enterprise-beans>



<session>
<ejb-name>MapSession</ejb-name>
<invoker>
<jndi-name>ejb/MapSession</jndi-name>
</invoker>
</session>



</enterprise-beans>

<resource-managers>
</resource-managers>



</jboss>

Following is the jboss-web.xml file:

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE jboss-web PUBLIC "-//JBoss//DTD Web Application 2.3//EN" "http://www.jboss.org/j2ee/dtd/jboss-web_3_0.dtd">

<jboss-web>









<ejb-ref>
<ejb-ref-name>ejb/MapSession</ejb-ref-name>
<jndi-name>ejb/MapSession</jndi-name>
</ejb-ref>


</jboss-web>

Following the relevenat portion of web.xml file:

<web-app>
<ejb-ref >
<description><![CDATA[Reference to the MapSession EJB]]></description>
<ejb-ref-name>ejb/MapSession</ejb-ref-name>
<ejb-ref-type>Session</ejb-ref-type>
<home>com.virtualcityindia.interfaces.MapSessionHome</home>
<remote>com.virtualcityindia.interfaces.MapSession</remote>
</ejb-ref>

</web-app>

When i deploys the ear file to JBoss server: I get following trace:

18:32:20,228 INFO [EARDeployer] Init J2EE application: file:/C:/Program Files/jboss-4.0.3SP1/server/default/deploy/virtaualcity.ear
18:32:20,688 INFO [EjbModule] Deploying MapSession
18:32:20,949 INFO [ProxyFactory] Bound EJB Home 'MapSession' to jndi 'MapSession'
18:32:20,949 INFO [EJBDeployer] Deployed: file:/C:/Program Files/jboss-4.0.3SP1/server/default/tmp/deploy/tmp56751virtaualcity.ear-contents/webapp.jar
18:32:21,019 INFO [TomcatDeployer] deploy, ctxPath=/virtualcity, warUrl=.../tmp/deploy/tmp56751virtaualcity.ear-contents/virtualcity-exp.war/
18:32:21,309 INFO [JBossCacheManager] init(): replicationGranularity_ is 0 and invaldateSessionPolicy is 2
18:32:21,359 INFO [JBossCacheManager] Starting JBossManager
18:32:21,470 INFO [EARDeployer] Started J2EE application: file:/C:/Program Files/jboss-4.0.3SP1/server/default/deploy/virtaualcity.ear

It says that EJB is deployed correctly.
I checked in jmx controller also ... the ejb is deployed correctly.
But still when i try to look up (Using the code i specified in the start) ; i gets following error:

description The server encountered an internal error () that prevented it from fulfilling this request.

exception :
javax.servlet.ServletException: look up of java:/comp/env/ejb/MapSession failed
com.virtualcityindia.web.IndexServlet.init(IndexServlet.java:60)
javax.servlet.GenericServlet.init(GenericServlet.java:211)
org.jboss.web.tomcat.security.CustomPrincipalValve.invoke(CustomPrincipalValve.java:39)
org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(SecurityAssociationValve.java:159)
org.jboss.web.tomcat.tc5.session.ClusteredSessionValve.invoke(ClusteredSessionValve.java:81)
org.jboss.web.tomcat.security.JaccContextValve.invoke(JaccContextValve.java:59)
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:105)
org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:148)
org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:856)
org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.processConnection(Http11Protocol.java:744)
org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:527)
org.apache.tomcat.util.net.MasterSlaveWorkerThread.run(MasterSlaveWorkerThread.java:112)
java.lang.Thread.run(Thread.java:595)

root cause :
javax.naming.NamingException: Could not dereference object [Root exception is javax.naming.NameNotFoundException: ejb not bound]
org.jnp.interfaces.NamingContext.resolveLink(NamingContext.java:1052)
org.jnp.interfaces.NamingContext.lookup(NamingContext.java:685)
org.jnp.interfaces.NamingContext.lookup(NamingContext.java:701)
org.jnp.interfaces.NamingContext.lookup(NamingContext.java:572)
javax.naming.InitialContext.lookup(InitialContext.java:351)
com.virtualcityindia.web.IndexServlet.init(IndexServlet.java:56)
javax.servlet.GenericServlet.init(GenericServlet.java:211)
org.jboss.web.tomcat.security.CustomPrincipalValve.invoke(CustomPrincipalValve.java:39)
org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(SecurityAssociationValve.java:159)
org.jboss.web.tomcat.tc5.session.ClusteredSessionValve.invoke(ClusteredSessionValve.java:81)
org.jboss.web.tomcat.security.JaccContextValve.invoke(JaccContextValve.java:59)
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:105)
org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:148)
org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:856)
org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.processConnection(Http11Protocol.java:744)
org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:527)
org.apache.tomcat.util.net.MasterSlaveWorkerThread.run(MasterSlaveWorkerThread.java:112)
java.lang.Thread.run(Thread.java:595)

root cause :
javax.naming.NameNotFoundException: ejb not bound
org.jnp.server.NamingServer.getBinding(NamingServer.java:514)
org.jnp.server.NamingServer.getBinding(NamingServer.java:522)
org.jnp.server.NamingServer.getObject(NamingServer.java:528)
org.jnp.server.NamingServer.lookup(NamingServer.java:252)
org.jnp.interfaces.NamingContext.lookup(NamingContext.java:610)
org.jnp.interfaces.NamingContext.lookup(NamingContext.java:572)
javax.naming.InitialContext.lookup(InitialContext.java:351)
org.jnp.interfaces.NamingContext.resolveLink(NamingContext.java:1046)
org.jnp.interfaces.NamingContext.lookup(NamingContext.java:685)
org.jnp.interfaces.NamingContext.lookup(NamingContext.java:701)
org.jnp.interfaces.NamingContext.lookup(NamingContext.java:572)
javax.naming.InitialContext.lookup(InitialContext.java:351)
com.virtualcityindia.web.IndexServlet.init(IndexServlet.java:56)
javax.servlet.GenericServlet.init(GenericServlet.java:211)
org.jboss.web.tomcat.security.CustomPrincipalValve.invoke(CustomPrincipalValve.java:39)
org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(SecurityAssociationValve.java:159)
org.jboss.web.tomcat.tc5.session.ClusteredSessionValve.invoke(ClusteredSessionValve.java:81)
org.jboss.web.tomcat.security.JaccContextValve.invoke(JaccContextValve.java:59)
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:105)
org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:148)
org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:856)
org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.processConnection(Http11Protocol.java:744)
org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:527)
org.apache.tomcat.util.net.MasterSlaveWorkerThread.run(MasterSlaveWorkerThread.java:112)
java.lang.Thread.run(Thread.java:595)

Can somebody pleae reply early. I need to solve this problem as quickly as possible.

Thanks in advance,
Best Regards,
Ashwani

1. Re: Problems with loolup of EJBs using JNDI

bdecoste May 22, 2006 12:49 PM (in response to ashw.kumar)
Can you confirm that "ejb/MapSession" and "ejb/MapSessionHome" are bound into the global jndi space?

Also, in jboss-web.xml, you need to reference the jndi binding of the hom interface, not the business interface.

<ejb-ref> <ejb-ref-name>ejb/MapSession</ejb-ref-name> <jndi-name>ejb/MapSessionHome</jndi-name> </ejb-ref>
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2. Re: Problems with loolup of EJBs using JNDI

ashw.kumar May 23, 2006 1:32 AM (in response to ashw.kumar)

Hi,

About changing jndi-name to "ejb/MapSessionHome" I tried it but same problem persist.

But i think the look up of MapSessionHome will happen using the ejb-jar.xml. The info abt MapSessionHome is specified there.

I looked into Global JNDI Namespace using jmx-console.
I found following relevant entried there.

Looks like MapSession is registered but no class loading available for MapSessionHome.

Do you have any clue why ?

+- jmx (class: org.jnp.interfaces.NamingContext)
| +- invoker (class: org.jnp.interfaces.NamingContext)
| | +- RMIAdaptor (proxy: $Proxy38 implements interface org.jboss.jmx.adaptor.rmi.RMIAdaptor,interface org.jboss.jmx.adaptor.rmi.RMIAdaptorExt)
| +- rmi (class: org.jnp.interfaces.NamingContext)
| | +- RMIAdaptor[link -> jmx/invoker/RMIAdaptor] (class: javax.naming.LinkRef)
+- MapSession (proxy: $Proxy58 implements No ClassLoaders found for: com.virtualcityindia.interfaces.MapSessionHome (no security manager: RMI class loader disabled))

Regards.
Ashwani
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3. Re: Problems with loolup of EJBs using JNDI

warrenc5 Apr 3, 2007 3:06 AM (in response to ashw.kumar)

That message in the Log

8:32:20,949 INFO [ProxyFactory] Bound EJB Home 'MapSession' to jndi 'MapSession' is the default.

So basically jboss is ignoring your jboss.xml mapping.

Can you please;

Change <jndi-name> jboss.xml or Change it to the Default MapSession, i.e. remove the ejb/ prefix

Change you jboss-web.xml <jndi-name> to MapSession, i.e. remove the ejb/ prefix

add a link to your web.xml

<ejb-ref>
<ejb-link>MapSession</ejb-link>
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