It looks like someone else describes the same problem:
http://openjpa.208410.n2.nabble.com/PC-object-losing-state-td4249977.html
I should say I'm using 2.0.1
Could this be a known bug?
Rgs,
Joel
On Sun, 2011-01-30 at 17:23 +0000, Joel Halbert wrote:
> Hi Folks,
>
> I'm getting this exception, sporadically, non-reproducable.
>
>
> Unmanaged object in persistent field
> "com.su3analytics.crawler.model.GlobalFrontier.host" during flush. However,
> this field does not allow cascade persist. Set the cascade attribute for this
> field to CascadeType.PERSIST or CascadeType.ALL (JPA annotations) or
> "persist" or "all" (JPA orm.xml), or enable cascade-persist globally, or
> manually persist the related field value prior to flushing. You cannot flush
> unmanaged objects or graphs that have persistent associations to unmanaged
> objects.
> FailedObject: com.su3analytics.crawler.model.Host-1
> at
> org.apache.openjpa.kernel.SingleFieldManager.preFlushPC(SingleFieldManager.java:767)
> at
> org.apache.openjpa.kernel.SingleFieldManager.preFlush(SingleFieldManager.java:607)
> at
> org.apache.openjpa.kernel.SingleFieldManager.preFlush(SingleFieldManager.java:575)
> at
> org.apache.openjpa.kernel.SingleFieldManager.preFlush(SingleFieldManager.java:491)
>
>
> I've tried alternating between runtime (agent) and compile time
> enhancement, and I get the error in both instances.
>
> I am not setting the property: openjpa.RuntimeUnenhancedClasses
>
> My code is loading an existing persisted object, and creating a new
> object with the existing object as a field. Effectively:
>
>
> ClientSeed cs = null;
> {
> EntityManager em =
> JPA.getEntityManagerFactory().createEntityManager();
> cs = em.find(ClientSeed.class, 1);
> em.close();
> }
>
> // then later, on another thread
>
> {
> EntityManager em =
> JPA.getEntityManagerFactory().createEntityManager();
> em.getTransaction().begin();
> GlobalFrontier frontier = new GlobalFrontier();
> frontier.setHost(cs.getHost());
> new GlobalFrontierDao(em).add(frontier);
> em.getTransaction().commit();
> }
>
> The exception is only sporadic though.
>
> Rgs
> Joel
>
