[ARIES-1625] JPA inheritence Eclipselink - classloader issue ?!

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Not A Bug
• Component/s: JPA

Environment

Karaf 4.0.7 with Eclipselink:
330 | Active | 80 | 3.2.0.v201302191141 | EclipseLink ANTLR
331 | Active | 80 | 5.0.1.v201405080102 | EclipseLink ASM
332 | Active | 80 | 2.6.1.v20150916-55dc7c3 | EclipseLink Core
333 | Active | 80 | 2.6.1.v20150916-55dc7c3 | EclipseLink JPA
334 | Active | 80 | 2.6.1.v20150916-55dc7c3 | EclipseLink Hermes Parser

and JPA support:

162 | Active | 80 | 2.3.0 | Apache Aries JPA Container API
163 | Active | 80 | 2.3.0 | Apache Aries JPA blueprint
164 | Active | 80 | 2.3.0 | Apache Aries JPA container
165 | Active | 80 | 2.3.0 | Apache Aries JPA support

Java:
Java(TM) SE Runtime Environment (build 1.8.0_101-b13)

OS:
Distributor ID: Ubuntu
Description: Ubuntu 14.04.4 LTS
Release: 14.04
Codename: trusty

• Assignee: Christian Schneider
• Reporter: maciek
• Created: 05/Oct/16 10:21
• Updated: 06/Oct/16 10:29
• Resolved: 06/Oct/16 10:16

Description

I have jar with packaged entities in it.

I have package org.test.base where I have class like:

BaseParameter.java

package org.test.base;
@Entity
@Inheritance(strategy = InheritanceType.SINGLE_TABLE)
@DiscriminatorColumn(name = "TYPE")
@Table(name = "PARAMETER")
public abstract class BaseParameter implements Serializable {...

	@Id
	@SequenceGenerator(name = "ParameterIdGenerator", allocationSize = 1, sequenceName = "SEQ_PARAMETER_ID")
	@GeneratedValue(generator = "ParameterIdGenerator", strategy = GenerationType.SEQUENCE)
	@Column(name = "ID", nullable = false, precision = 20)
	protected Long id;

and another package org.test.operation in which I have concrete parameter for example:

SubscriptionParameter.java

package org.test.operation 
@Entity
@DiscriminatorValue("SUBSCRIPTION")
public class SubscriptionParameter extends BaseParameter { .....

I am using example from
https://github.com/apache/aries/tree/trunk/jpa/examples
to get to my entities using DS module but of course I modified it to fit my model.

Commands I do are:
install -s mvn:pl.orange.isep/my-model/0.1-SNAPSHOT -> OK
install -s mvn:org.apache.aries.jpa.example/org.apache.aries.jpa.example.tasklist.model/3.0.0-SNAPSHOT

and then the exception arises:

Exception

org.apache.aries.jpa/org.apache.aries.jpa.container/2.3.0]: Unexpected problem updating configuration org.apache.aries.jpa.tasklist
javax.persistence.PersistenceException: Exception [EclipseLink-28018] (Eclipse Persistence Services - 2.6.1.v20150916-55dc7c3): org.eclipse.persistence.exceptions.EntityManagerSetupException
Exception Description: Predeployment of PersistenceUnit [tasklist] failed.
Internal Exception: Exception [EclipseLink-7161] (Eclipse Persistence Services - 2.6.1.v20150916-55dc7c3): org.eclipse.persistence.exceptions.ValidationException
Exception Description: Entity class [class org.test.operation.SubscriptionParameter] has no primary key specified. It should define either an @Id, @EmbeddedId or an @IdClass. If you have defined PK using any of these annotations then make sure that you do not have mixed access-type (both fields and properties annotated) in your entity class hierarchy.
        at org.eclipse.persistence.internal.jpa.EntityManagerSetupImpl.createPredeployFailedPersistenceException(EntityManagerSetupImpl.java:2035)[333:org.eclipse.persistence.jpa:2.6.1.v20150916-55dc7c3]
        at org.eclipse.persistence.internal.jpa.EntityManagerSetupImpl.predeploy(EntityManagerSetupImpl.java:2026)[333:org.eclipse.persistence.jpa:2.6.1.v20150916-55dc7c3]
        at org.eclipse.persistence.jpa.PersistenceProvider.createContainerEntityManagerFactoryImpl(PersistenceProvider.java:347)[333:org.eclipse.persistence.jpa:2.6.1.v20150916-55dc7c3]
        at org.eclipse.persistence.jpa.PersistenceProvider.createContainerEntityManagerFactory(PersistenceProvider.java:313)[333:org.eclipse.persistence.jpa:2.6.1.v20150916-55dc7c3]
        at org.apache.aries.jpa.eclipselink.adapter.EclipseLinkPersistenceProvider.createContainerEntityManagerFactory(EclipseLinkPersistenceProvider.java:52)[302:org.apache.aries.jpa.eclipselink.adapter:2.3.0]
        at org.apache.aries.jpa.container.impl.ManagedEMF.createAndPublishEMF(ManagedEMF.java:129)[164:org.apache.aries.jpa.container:2.3.0]
        at org.apache.aries.jpa.container.impl.ManagedEMF.updated(ManagedEMF.java:125)[164:org.apache.aries.jpa.container:2.3.0]
        at org.apache.felix.cm.impl.helper.ManagedServiceTracker.updated(ManagedServiceTracker.java:189)[3:org.apache.felix.configadmin:1.8.8]
        at org.apache.felix.cm.impl.helper.ManagedServiceTracker.updateService(ManagedServiceTracker.java:152)[3:org.apache.felix.configadmin:1.8.8]

My assumption is that class BaseParameter is not seen by the eclipselink that validates entities.

But surprisingly when I change the package for this two entities that they are in common package for example org.base then everything is loading fine and I can access my entities.
Problem was happening with all my entities consecutively until I packed them all in one package, then it disappeared.

My model is quite complex and I really dont want to have all entities mixed in one package. Do You have any idea why it happens?
The examples from github (https://github.com/apache/aries/tree/trunk/jpa/examples) have no JPA inheritence and all the entities are in one package.

I have my application configured correctly (persistence.xml etc.) because only package change makes a difference.

Is it Karaf classloader issue or jpa-container one? Is there any workaroud other than putting all entities in one package?