[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=12722078#comment-12722078 ] 

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

On the first client call to test1, we reach the readResolve() for the Location (associated with the entity returned from test1()).  In SerializingCloner.clone(), we have:
  objClass=org.hibernate.proxy.pojo.javassist.SerializableProxy
  orig = org.hibernate.proxy.pojo.javassist.SerializableProxy at 634bfc56

The above call to test1() works.

During the test1 call, the readResolve() generates a new proxy class (as expected) but the server side doesn't know about the generated proxy class when the entity is passed back to the server (test2 method).  That seems to lead to the cnfe.  

For the call to test2(), we are passing the entity returned from test1() but fail due to the CNFE.
In SerializingCloner.clone(), we have:
  objClass = class de.seimet.photo.entity.Location_$$_javassist_2
  orig.getClass() = class de.seimet.photo.entity.Location_$$_javassist_2
  orig.getClass().getClassLoader() = "deployment.photo_web.war:main"


                
> 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.

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