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From Aman Nanner/MxI Technologies <aman.nan...@mxi.com>
Subject Re: Error looking up EJB reference
Date Fri, 08 Jun 2007 21:06:57 GMT
This problem occurs when <inverse-classloading> is set in a web
application.  I've raised a JIRA here:

https://issues.apache.org/jira/browse/GERONIMO-3233


Aman Nanner/MxI Technologies <aman.nanner@mxi.com> wrote on 06-08-2007
02:10:17 PM:

> I tried deploying a small test.ear application, but I did not experience
> this problem with it.  It seems my main EAR application and this test EAR
> application use different instances of the "SystemInstance" singleton
(e.g.
> there are two singletons).  Presumably this is because each application's
> classloader loads a version of SystemInstance.  It seems that my test EAR
> application's SystemInstance is full of "components" in the HashMap of
> components, but my main EAR application's SystemInstance has no
components
> in its HashMap, which eventually results in the NullPointerException
> described below.
>
> I'll try to investigate more, but would anybody happen to know why this
> would happen?
>
> Thanks,
> Aman
>
> Aman Nanner/MxI Technologies <aman.nanner@mxi.com> wrote on 06-07-2007
> 03:55:57 PM:
>
> >
> > I'm deploying a J2EE 1.4 application on Apache Geronimo 2.0-SNAPSHOT.
> This
> > application is not up to JEE 5 standards yet (i.e. it uses deployment
> > descriptors instead of annotations).  I am getting some errors during
the
> > resolution of EJB references.  I have my EJB references defined in the
> > ejb-jar.xml, but I'm getting a strange error during execution:
> >
> > 15:46:49,877 WARN  [EjbFactory] Unable to lookup up EJB by reference
name
> > 'ejb/common/SequenceGenerator'; you must define the EJB reference
> > javax.naming.NamingException: Could not look up :
> > ejb/common/SequenceGenerator [Root exception is
> > java.lang.NullPointerException]
> >       at org.apache.xbean.naming.context.ContextUtil.resolve(
> > ContextUtil.java:65)
> >       at org.apache.xbean.naming.context.AbstractContext.lookup(
> > AbstractContext.java:112)
> >       at org.apache.xbean.naming.context.AbstractContext.lookup(
> > AbstractContext.java:611)
> >       at org.apache.xbean.naming.context.AbstractContext.lookup(
> > AbstractContext.java:152)
> >       at org.apache.xbean.naming.context.AbstractContext.lookup(
> > AbstractContext.java:611)
> >       at org.apache.xbean.naming.context.AbstractContext.lookup(
> > AbstractContext.java:152)
> >       at org.apache.xbean.naming.context.AbstractContext.lookup(
> > AbstractContext.java:597)
> >       at javax.naming.InitialContext.lookup(InitialContext.java:351)
> > .....
> >       at org.apache.catalina.core.StandardEngineValve.invoke(
> > StandardEngineValve.java:109)
> >       at org.apache.catalina.valves.AccessLogValve.invoke(
> > AccessLogValve.java:563)
> >       at org.apache.catalina.connector.CoyoteAdapter.service(
> > CoyoteAdapter.java:261)
> >       at org.apache.coyote.http11.Http11Processor.process(
> > Http11Processor.java:844)
> >       at
> >
org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(
> > Http11Protocol.java:581)
> >       at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(
> > JIoEndpoint.java:447)
> >       at java.lang.Thread.run(Thread.java:595)
> > Caused by: java.lang.NullPointerException
> >       at
> org.apache.openejb.core.ivm.naming.IntraVmJndiReference.getObject(
> > IntraVmJndiReference.java:38)
> >       at org.apache.openejb.core.ivm.naming.Reference.getContent(
> > Reference.java:40)
> >       at org.apache.xbean.naming.context.ContextUtil.resolve(
> > ContextUtil.java:61)
> >       ... 50 more
> >
> >
> > It seems that the "containerSystem" variable in IntraVmJndiReference is
> > null.  Does anybody know if this is an incomplete feature, or what the
> > problem could be?
> >
> > Thanks,
> > Aman
> >
> >
>
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>
__________________________________________________________________________________

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__________________________________________________________________________________
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