[ARIES-1270] ClasscastException or incompatible type when persistence unit bundle is refreshed

• Type: Bug
• Status: Resolved
• Priority: Critical
• Resolution: Fixed
• Affects Version/s: jpa-container-1.0.2, jpa-container-context-1.0.4, jpa-container-context-1.0.3
• Fix Version/s: jpa-2.0.0
• Component/s: JPA
• Assignee: Christian Schneider
• Reporter: Christian Schneider
• Created: 05/Nov/14 08:38
• Updated: 08/Jun/15 10:19
• Resolved: 08/Jun/15 10:19

Description

How to reproduce:
Follow installation instructions of my tasklist-cdi tutorial
https://github.com/cschneider/Karaf-Tutorial/tree/master/tasklist-blueprint-cdi

• After installation the example works
• refresh net.lr.tasklist.cdi.tasklist-model
• When accessing http://localhost:8181/tasklist you get the exception below
• After a restart of karaf it works again

So the problem seems to be that with a refresh you get a new classloader for the model bundle but the persistence unit (EnityManagerFactory) is not renewed so it still uses the old classloader.

I am not yet sure if the problem is in jpa.container or jpa.container.context.

I will try to recreate this error in an itest for jpa so we can track it easily.

—
java.lang.IllegalArgumentException: Type specified for TypedQuery [net.lr.tasklist.model.Task] is incompatible with query return type [class net.lr.tasklist.model.Task]
at org.hibernate.ejb.AbstractEntityManagerImpl.resultClassChecking(AbstractEntityManagerImpl.java:702)
at org.hibernate.ejb.AbstractEntityManagerImpl.createQuery(AbstractEntityManagerImpl.java:303)
at