Call remote EJB on other JBoss from web

[citystory]

Hi all,
as title, I can access remote EJB through standalone client, but failed for web client. All in jboss-4.0.0.

Exception thrown is ClassCastException when casting to EJBHome.
Source failed on PortableRemoteObject.narrow(...)

Below is my config. any hints? thanks much
jboss-service.xml

<mbean code="org.jboss.naming.ExternalContext" name="jboss.jndi:service=ExternalContext,jndiName=time/arr/UstCourseInfoService">
 <attribute name="JndiName">time/arr/UstCourseInfoService</attribute>
 <attribute name="Properties">jnp.properties</attribute>
 <attribute name="InitialContext">javax.naming.InitialContext</attribute>
 </mbean>

jnp.properties
java.naming.factory.initial=org.jnp.interfaces.NamingContextFactory
java.naming.provider.url=jnp://myremotehost:1099/time/arr/UstCourseInfoService
java.naming.factory.url.pkgs=org.jnp.interfaces

jboss-web.xml

<ejb-ref>
<ejb-ref-name>time/arr/UstCourseInfoService</ejb-ref-name> <jndi-name>jnp://myremotehost:1099/application/time/arr/UstCourseInfoService</jndi-name>
</ejb-ref>

[citystory]

Solved it but even not require ExternalContext.

Changes :
1. jboss-web.xml
<jndi-name>jnp://myremotehost:1099/time/arr/UstCourseInfoService</jndi-name>
Remove "application"
2. ServiceLocator.java
java:comp/env/time/arr/UstCourseInfoService
Add "java:comp/env/

Yet, my scheduler in SAR still can't access remote EJB with
javax.naming.NameNotFoundException: env not bound

Following workarounds failed :
1. package WAR into SAR (hope to able to use jboss-web.xml JNDI)
2. add

<depends>jboss.j2ee:service=EJB,jndiName=time/arr/UstCourseInfoService</depends>

into jboss-service.xml of SAR

Any help? thanks much

[citystory]

Fixed by setup InitialContext in code without java:comp/env

Since ServiceLocator.getRemoteHome is centralized.
add utility method StackTrace.findInStackTrace(String classNamePattern)
to distinguish the caller from WEB or SAR.

Also JAAS is added for both case.

Thanks anyway