Hi all,
i am using hibernate on Sun's app server and i have the following problem testing two classes like:

class name="A" table="A">
<id name="aid" column="A_ID" type="long">
<generator class="..."/></id>
<property name="descr1" column="DSC" type="java.lang.String" />
<many-to-one name="B" column="B_ID" class="B" />
</class>

<class name="B" table="B">
<id name="bid" column="B_ID" type="long">
<generator class="..."/></id>
<property name="descr2" column="DSC" type="java.lang.String" />
</class>

when i load an A object, ejb container complains for serialization errors (on B's proxy). If i change B's id type from "long" to "java.lang.Long" everything works fine.

Thanks,
Vassilis

It was a similar problem with custom "writeReplace" method and make sure you have same class versions on client and on server.
BTW submit stack trace if it doe's not help.

Here is the stacktrace.
"My" is the EJB, "getA" is the EJB method which returns an A object and MyBeanTestClient1 is my EJB tester..

java.rmi.MarshalException: CORBA MARSHAL 1398079699 Maybe; nested exception is:
org.omg.CORBA.MARSHAL: Unable to read value from underlying bridge : Unable to read value from underlying bridge : Unable to read value from underlying bridge : Unable to load Class long : long (no security manager: RMI class loader disabled) vmcid: SUN minor code: 211 completed: Maybe

at com.sun.corba.se.internal.iiop.ShutdownUtilDelegate.mapSystemException(ShutdownUtilDelegate.java:100)

at javax.rmi.CORBA.Util.mapSystemException(Util.java:65)

at com.intralot.bon.entities.system._My_Stub.getA(Unknown Source)

at com.intralot.bon.entities.system.MyBeanTestClient1.<init>(MyBeanTestClient1.java:18)

at com.intralot.bon.entities.system.MyBeanTestClient1.main(MyBeanTestClient1.java:44)

Caused by: org.omg.CORBA.MARSHAL: Unable to read value from underlying bridge : Unable to read value from underlying bridge : Unable to read value from underlying bridge : Unable to load Class long : long (no security manager: RMI class loader disabled) vmcid: SUN minor code: 211 completed: Maybe

at com.sun.corba.se.internal.iiop.CDRInputStream_1_0.read_value(CDRInputStream_1_0.java:953)

at com.sun.corba.se.internal.iiop.CDRInputStream.read_value(CDRInputStream.java:289)

at com.sun.corba.se.internal.corba.TCUtility.unmarshalIn(TCUtility.java:266)

at com.sun.corba.se.internal.corba.AnyImpl.read_value(AnyImpl.java:561)

at com.sun.corba.se.internal.iiop.CDRInputStream_1_0.read_any(CDRInputStream_1_0.java:635)

at com.sun.corba.se.internal.iiop.CDRInputStream.read_any(CDRInputStream.java:260)

at com.sun.corba.se.internal.javax.rmi.CORBA.Util.readAny(Util.java:100)

at javax.rmi.CORBA.Util.readAny(Util.java:90)

at com.intralot.bon.entities.system._My_Stub.getA(Unknown Source)

... 2 more