[jboss-jira] [JBoss JIRA] (AS7-5496) Hibernate proxy class not found in remote EJB call

[Scott Marlow (JIRA)]

    [ https://issues.jboss.org/browse/AS7-5496?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12722058#comment-12722058 ] 

Scott Marlow commented on AS7-5496:
-----------------------------------

Moved the entity classes into the ejb jar (photo_ejb.jar), but still get a CNFE when trying to clone the client (deployment.photo_web.war:main") copy of the de.seimet.photo.entity.Location_$$_javassist_2 proxy class.

We are calling "Class.forName(name, true, destClassLoader)" with name = de.seimet.photo.entity.Location_$$_javassist_2 and destClassLoader = "deployment.photo_ear.ear.photo_ejb.jar:main"

ClassLoader deployment.photo_ear.ear.photo_ejb.jar:main does have de.seimet.photo.entity.Location_$$_javassist_0 loaded but doesn't know about de.seimet.photo.entity.Location_$$_javassist_2.

de.seimet.photo.entity.Location_$$_javassist_2 came from the client sides call to JavassistLazyInitializer.getProxy() in readResolve().

When the client side is passing the de.seimet.photo.entity.Location_$$_javassist_2 parameter to the server side (ear), we don't seem to reach readResolve() for the parameter.
                
> Hibernate proxy class not found in remote EJB call
> --------------------------------------------------
>
>                 Key: AS7-5496
>                 URL: https://issues.jboss.org/browse/AS7-5496
>             Project: Application Server 7
>          Issue Type: Bug
>          Components: JPA / Hibernate
>    Affects Versions: 7.1.1.Final
>         Environment: Java 1.6.0_35 and Java 1.7.0_07
> Mac OS X 10.8.1, Windows XP and Gentoo Linux with Kernel 3.5.3
>            Reporter: Uwe Seimet
>            Assignee: Scott Marlow
>         Attachments: deployments.tar.gz, server.log, sources.tar.gz, sources2.tar.gz, test.sql
>
>
> Prerequisites:
> 1. A JPA entity A with a reference to a different JPA entity B. FetchType is FetchType.LAZY, e.g.
> @Entity
> public class A {
>   @ManyToOne(fetch = FetchType.LAZY)
>   private B refToB;
> }
> @Entity
> public class B {
> }
> 2. A remote interface with methods passing an instance of A, .e.g.
> @Remote
> public interface ITest {
>     A test1();
>     void test2(A a);
> }
> 3. A process calling test1() and then test2() on the remote interface like this:
>   @EJB(lookup = "...")
>   private ITest iTest;
>   public void ITest() {
>         final A a = iTest.test1();
>         iTest.test2(a);  }
>   }
> Error description: When calling test1() an instance of A is returned. This instance is valid and works as expected. The reference to B is a proxy (something like B_$$_javassist_2), which was expected because B was loaded lazily and was never accessed in the remote process before. When passing the instance of A back by calling test2(a) an exception of this type is raised:
> java.lang.ClassNotFoundException: B_$$_javassist_2 from [Module "deployment.x.ear.y_ejb.jar:main" from Service Module Loader]
> 	at org.jboss.modules.ModuleClassLoader.findClass(ModuleClassLoader.java:190)
> 	at org.jboss.modules.ConcurrentClassLoader.performLoadClassUnchecked(Concurrent
> ClassLoader.java:468)
> It looks as if the proxy cannot be serialized or deserialized. The behavior is reproducible with different applications on different platforms. As soon as a Hibernate javassist proxy, which was received via a remote call, is passed back as an argument in another remote call (the remote process is the same in all calls) the exception is raised.
> The classloader settings are the standard JBoss settings.

--
This message is automatically generated by JIRA.
If you think it was sent incorrectly, please contact your JIRA administrators
For more information on JIRA, see: http://www.atlassian.com/software/jira