NPE when using LiteAutoDetach
------------------------------
Key: OPENJPA-2136
URL: https://issues.apache.org/jira/browse/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.
[1]
http://openjpa.apache.org/builds/latest/docs/docbook/manual.html#ref_guide_detach_state
[2] Caused by: <openjpa-2.2.0-SNAPSHOT-r422266:1244602 nonfatal general error>
org.apache.openjpa.persistence.PersistenceException: null
at
org.apache.openjpa.kernel.BrokerImpl.beforeCompletion(BrokerImpl.java:1998)
at
org.apache.openjpa.kernel.LocalManagedRuntime.commit(LocalManagedRuntime.java:81)
at org.apache.openjpa.kernel.BrokerImpl.commit(BrokerImpl.java:1514)
at
org.apache.openjpa.kernel.DelegatingBroker.commit(DelegatingBroker.java:933)
at
org.apache.openjpa.persistence.EntityManagerImpl.commit(EntityManagerImpl.java:570)
... 24 more
Caused by: java.lang.NullPointerException
at org.apache.openjpa.Customer.pcProvideField(Customer.java)
at
org.apache.openjpa.kernel.StateManagerImpl.provideField(StateManagerImpl.java:3161)
at
org.apache.openjpa.kernel.StateManagerImpl.preFlush(StateManagerImpl.java:2980)
at
org.apache.openjpa.kernel.PDirtyState.beforeFlush(PDirtyState.java:38)
at
org.apache.openjpa.kernel.StateManagerImpl.beforeFlush(StateManagerImpl.java:1053)
at org.apache.openjpa.kernel.BrokerImpl.flush(BrokerImpl.java:2112)
at org.apache.openjpa.kernel.BrokerImpl.flushSafe(BrokerImpl.java:2072)
at
org.apache.openjpa.kernel.BrokerImpl.beforeCompletion(BrokerImpl.java:1990)
... 28 more
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