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Subject: Re: Unmanaged object in persistent fie - exception
From: Joel Halbert <joel@su3analytics.com>
To: users@openjpa.apache.org
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Date: Sun, 30 Jan 2011 17:30:57 +0000
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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
>