Stack overflow error - please help me

[jeditom]

Can anyone help me please? I'm trying to deploy an ear file containing a bunch of servlets and a couple of stateless EJBs and I'm getting the following error the first time one of my EJBs is looked up.

----------------------------------------------------------
10:18:12,297 WARN [jbossweb] WARNING: Error for /singlescrowd/Authentication/submit/login?pin=420151&password=121313&ph
one224041java.lang.StackOverflowError
at com.sun.naming.internal.VersionHelper12$6.run(VersionHelper12.java:161)
at java.security.AccessController.doPrivileged(Native Method)
at com.sun.naming.internal.VersionHelper12.getContextClassLoader(VersionHelper12.java:158)
at com.sun.naming.internal.VersionHelper12.loadClass(VersionHelper12.java:41)
at javax.naming.spi.NamingManager.getObjectFactoryFromReference(NamingManager.java:129)
at javax.naming.spi.NamingManager.getObjectInstance(NamingManager.java:299)
at javax.naming.spi.NamingManager.getContext(NamingManager.java:419)
at javax.naming.spi.ContinuationContext.getTargetContext(ContinuationContext.java:35)
at javax.naming.spi.NamingManager.getContinuationContext(NamingManager.java:763)
at org.jnp.interfaces.NamingContext.lookup(NamingContext.java:568)
at org.jnp.interfaces.NamingContext.lookup(NamingContext.java:440)
at javax.naming.InitialContext.lookup(InitialContext.java:347)
at org.jnp.interfaces.NamingContext.lookup(NamingContext.java:533)
at org.jnp.interfaces.NamingContext.lookup(NamingContext.java:569)
at org.jnp.interfaces.NamingContext.lookup(NamingContext.java:440)
---------------------------------------------------------

I'm pretty sure that I have modified the web.xml and the jboss-web.xml correctly but the error still occurs. The application deploys fine (according to my DOS window.) I've also been reading about the jboss.xml and am unsure as to what to do with all these XML tags!

I'm running JBoss 3.0.3, with JDK 1.4.1 and J2EE 1.3.1 on a windows 2000 machine. The relevant contents of my xml files are...

web.xml...

<ejb-ref>
<ejb-ref-name>ejb/UserSession</ejb-ref-name>
<ejb-ref-type>Session</ejb-ref-type>
com.masc.singles.ejb/UserSessionHome
com.masc.singles.ejb.UserSession
</ejb-ref>

jboss-web.xml

<ejb-ref>
<ejb-ref-name>ejb/SCInterface</ejb-ref-name>
<jndi-name>java:comp/env/ejb/SCInterface</jndi-name>
</ejb-ref>

Many thanks in advance for any help!

[adrian.brock]

<ejb-ref>
<!-- This line creates java:comp/env/ejb/SCinterface
for the web container -->
<ejb-ref-name>ejb/SCInterface</ejb-ref-name>

<!-- This should be the global jndi name,
probably SCInterface unless you changed it in jboss.xml -->
<jndi-name>java:comp/env/ejb/SCInterface</jndi-name>
</ejb-ref>

Regards,
Adrian

[jeditom]

Hi Adrian,

Thanks for your advice, it doesn't seem to have worked though. I don't get the stack overflow anymore, now I changed my jboss-web.xml to read;

<jboss-web>
<ejb-ref>
<ejb-ref-name>ejb/SCInterface</ejb-ref-name>
<jndi-name>SCInterface</jndi-name>
</ejb-ref>
<ejb-ref>
<ejb-ref-name>ejb/UserSession</ejb-ref-name>
<jndi-name>UserSession</jndi-name>
</ejb-ref>
</jboss-web>

I get a NameNotFoundException thrown...

javax.naming.NameNotFoundException: SCInterface not bound
at org.jnp.server.NamingServer.getBinding(NamingServer.java:495)
at org.jnp.server.NamingServer.getBinding(NamingServer.java:503)
at org.jnp.server.NamingServer.getObject(NamingServer.java:509)
at org.jnp.server.NamingServer.lookup(NamingServer.java:282)
at org.jnp.interfaces.NamingContext.lookup(NamingContext.java:456)
at org.jnp.interfaces.NamingContext.lookup(NamingContext.java:440)
at javax.naming.InitialContext.lookup(InitialContext.java:347)
at org.jnp.interfaces.NamingContext.lookup(NamingContext.java:533)
at org.jnp.interfaces.NamingContext.lookup(NamingContext.java:569)
at org.jnp.interfaces.NamingContext.lookup(NamingContext.java:440)
at javax.naming.InitialContext.lookup(InitialContext.java:347)
at com.masc.singles.web.Authentication.doAction(Authentication.java:46)

Do you have any more ideas? I'm completely stuck.

Many thanks.

Tom

[adrian.brock]

Do you have an EJB bound at SCInterface?

Regards,
Adrian

[jeditom]

Hi Adrian,

I'm pretty sure I have the EJB bound correctly. Following are the details from my XML files...

web.xml...

<ejb-ref>
<ejb-ref-name>ejb/UserSession</ejb-ref-name>
<ejb-ref-type>Session</ejb-ref-type>
com.masc.singles.ejb/UserSessionHome
com.masc.singles.ejb.UserSession
</ejb-ref>

jboss-web.xml

<ejb-ref>
<ejb-ref-name>ejb/SCInterface</ejb-ref-name>
<jndi-name>java:comp/env/ejb/SCInterface</jndi-name>
</ejb-ref>

And in my code I am lookup()-ing the value "java:comp/env/ejb/SCInterface"

I'm completely lost, I thought that editing the XML files (from what the Sun RI deploytool wrote for me) would surfice, but obviously not!

Thanks for your help!

Tom

[adrian.brock]

You will have something like this

ejb-jar.xml
<ejb-name>SCInterface</ejb-name>

This will bind the bean at SCInterface
Unless you've changed in jboss.xml

In web.xml you have
<ejb-ref>
<ejb-ref-name>ejb/SCInterface</ejb-ref-name>
...
</ejb-ref>

In jboss-web.xml put
<ejb-ref>
<ejb-ref-name>ejb/SCInterface</ejb-ref-name>
<jndi-name>SCInterface</jndi-name>
</ejb-ref>

NOTE: If you are using an ear, you can use ejb-link

In web.xml put
<ejb-ref>
<ejb-ref-name>ejb/SCInterface</ejb-ref-name>
...
<ejb-link>SCInterface</ejb-link> <!-- ejb-name of bean -->
</ejb-ref>

Then you don't need jboss-web.xml

Regards,
Adrian

[dnoyeb]

Was their any solution here? I am having a similar issue.

at javax.naming.InitialContext.lookup(InitialContext.java:345)
at org.jnp.interfaces.NamingContext.lookup(NamingContext.java:556)
at org.jnp.interfaces.NamingContext.lookup(NamingContext.java:592)
at org.jnp.interfaces.NamingContext.lookup(NamingContext.java:443)
at javax.naming.InitialContext.lookup(InitialContext.java:345)
at org.jnp.interfaces.NamingContext.lookup(NamingContext.java:556)
at org.jnp.interfaces.NamingContext.lookup(NamingContext.java:592)
at org.jnp.interfaces.NamingContext.lookup(NamingContext.java:443)
at javax.naming.InitialContext.lookup(InitialContext.java:345)
at org.jnp.interfaces.NamingContext.lookup(NamingContext.java:556)
at org.jnp.interfaces.NamingContext.lookup(NamingContext.java:592)
at org.jnp.interfaces.NamingContext.lookup(NamingContext.java:443)
at javax.naming.InitialContext.lookup(InitialContext.java:345)
at

etc. till the stack blows. I am trying to get a database conn from the pool.

jboss.xml contains


<ejb-name>BranchKeyGenerator</ejb-name>
<jndi-name>ejb/BranchKeyGenerator</jndi-name>
<local-jndi-name>ejb/BranchKeyGeneratorLocal</local-jndi-name>
<resource-ref>
<res-ref-name>java:/jdbc/TestDS</res-ref-name>
<resource-name>aDBConn</resource-name>
</resource-ref>


</enterprise-beans>

<resource-managers>
<resource-manager>
<res-name>aDBConn</res-name>
<res-jndi-name>java:comp/env/jdbc/TestDS</res-jndi-name>
</resource-manager>
</resource-managers>


ejb-jar contains

<resource-ref>
<res-ref-name>java:/jdbc/TestDS</res-ref-name>
<res-type>javax.sql.Datasource</res-type>
<res-auth>Container</res-auth>
</resource-ref>



I just cant get it to stop blowing up...

[dnoyeb]

im using jboss 3.0.4 with tomcat 4.1.x

thanks!