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From "Rick Curtis (Created) (JIRA)" <>
Subject [jira] [Created] (OPENJPA-2136) NPE when using LiteAutoDetach
Date Tue, 21 Feb 2012 20:18:48 GMT
NPE when using LiteAutoDetach 

                 Key: OPENJPA-2136
             Project: OpenJPA
          Issue Type: Bug
          Components: kernel
    Affects Versions: 2.2.0, 2.1.1, 2.0.0, 2.3.0
            Reporter: Rick Curtis
            Assignee: Rick Curtis
             Fix For: 2.3.0, 2.2.1

I encountered a NPE[2] today when using the LiteAutoDetach[1] configuration property. The
steps required to cause this problem is as follows:

- Configure LiteAutoDetach for your PU.
- Find a non-transactional Entity.
- Clear the EntityManager.
- Begin / commit transaction.

The problem is that LiteAutoDetach doesn't properly clean up the EntityManager while it is
performing lite detachment. State is left in BrokerImpl._pending set which is then incorrectly
used post em.clear. It also appears that there are a number of other BrokerImpl datastructures
that *should* have been cleaned up on clear / detachall. 

[2] Caused by: <openjpa-2.2.0-SNAPSHOT-r422266:1244602 nonfatal general error> org.apache.openjpa.persistence.PersistenceException:
	at org.apache.openjpa.kernel.BrokerImpl.beforeCompletion(
	at org.apache.openjpa.kernel.LocalManagedRuntime.commit(
	at org.apache.openjpa.kernel.BrokerImpl.commit(
	at org.apache.openjpa.kernel.DelegatingBroker.commit(
	at org.apache.openjpa.persistence.EntityManagerImpl.commit(
	... 24 more
Caused by: java.lang.NullPointerException
	at org.apache.openjpa.Customer.pcProvideField(
	at org.apache.openjpa.kernel.StateManagerImpl.provideField(
	at org.apache.openjpa.kernel.StateManagerImpl.preFlush(
	at org.apache.openjpa.kernel.PDirtyState.beforeFlush(
	at org.apache.openjpa.kernel.StateManagerImpl.beforeFlush(
	at org.apache.openjpa.kernel.BrokerImpl.flush(
	at org.apache.openjpa.kernel.BrokerImpl.flushSafe(
	at org.apache.openjpa.kernel.BrokerImpl.beforeCompletion(
	... 28 more

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