MappedSuperClass problem on Weblogic 12c

Question

Hello.
I'm trying to use @MappedSuperClass in myApp.
When I deploy my app to weblogic 12c, it gives me following error.
in my experience it occures error when i write Country.class in the code.
*[HTTP:101216]Servlet: "TestSuperService" failed to preload on startup in Web application: "MyApp". java.lang.NoSuchMethodError: data.GeneralEntity.pcGetManagedFieldCount()I at myApp.entity.Country.<clinit>(Country.java) at java.lang.Class.forName0(Native Method) at java.lang.Class.forName(Class.java:247) at org.eclipse.persistence.internal.security.PrivilegedAccessHelper.getClassForName(PrivilegedAccessHelper.java:119) at org.eclipse.persistence.mappings.foundation.AbstractCompositeCollectionMapping.convertClassNamesToClasses(AbstractCompositeCollectionMapping.java:352) at org.eclipse.persistence.descriptors.ClassDescriptor.convertClassNamesToClasses(ClassDescriptor.java:1534) at org.eclipse.persistence.sessions.Project.convertClassNamesToClasses(Project.java:432) at*
Here is GeneralEntity class in data project :
*@MappedSuperclass*
*public abstract class GeneralEntity implements Serializable  {*
*@Id*
private BigDecimal pkId;
*@Column*
private String Id;
*public void setPkId(BigDecimal pkId) {*
this.pkId = pkId;
*public BigDecimal getPkId() {*
return pkId;
*public void setId(String Id) {*
this.Id = Id;
*public String getId() {*
return Id;
Here is Country class in myApp.entity project :
*@Entity*
*public class Country extends GeneralEntity{*
*public Country() {*       
*@Column*
private String region;
*public void setRegion(String region) {*
this.region = region;
*public String getRegion() {*
return region;
Please everyone help me to solve this problem
thanks
Edited by: 896641 on Jan 2, 2012 12:20 PM

Answer 1

There isn't much to go on. My first guess was that Country.class is in code that is run before the persistence unit is deployed causing a classloader issue. Googling the error brings up CR370788
in : http://docs.oracle.com/cd/E15051_01/wls/docs103/pdf/issues.pdf
which suggests this can occur in a particular situation that seems related - the modules you are using will need to be reordered.
You can also try using static weaving as a workaround if the above does not work, described here:
http://wiki.eclipse.org/Using_EclipseLink_JPA_Extensions_(ELUG)#How_to_Configure_Static_Weaving_for_JPA_Entities
weaving is described here:
http://wiki.eclipse.org/Using_EclipseLink_JPA_Extensions_(ELUG)#Using_EclipseLink_JPA_Weaving
Static weaving may not work though as the pcGetManagedFieldCount method is not added by EclipseLink weaving anyway. If neither work, please post the application structure and the persistence.xml being used.
Best Regards,
Chris