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From "Mark Struberg (Created) (JIRA)" <j...@apache.org>
Subject [jira] [Created] (OPENJPA-2107) ManagedCache conflict due adding an entity 2 times in the same query.
Date Wed, 11 Jan 2012 17:55:39 GMT
ManagedCache conflict due adding an entity 2 times in the same query.
---------------------------------------------------------------------

                 Key: OPENJPA-2107
                 URL: https://issues.apache.org/jira/browse/OPENJPA-2107
             Project: OpenJPA
          Issue Type: Bug
          Components: kernel
    Affects Versions: 2.2.0
            Reporter: Mark Struberg
            Assignee: Mark Struberg
             Fix For: 2.2.0


I have a complex query which creates the following error:

<openjpa-2.2.0-tiss-2-rexported nonfatal user error> org.apache.openjpa.persistence.ArgumentException:
Cannot load object with id "26301".  Instance "at.ac.tuwien.tiss.curriculum.be.entities.DefaultCourse@6e267b76"
with the same id already exists in the L1 cache.  This can occur when you assign an existing
id to a new instance, and before flushing attempt to load the existing instance for that id.
FailedObject: at.ac.tuwien.tiss.curriculum.be.entities.DefaultCourse-26301
	at org.apache.openjpa.kernel.ManagedCache.add(ManagedCache.java:126)
	at org.apache.openjpa.kernel.BrokerImpl.setStateManager(BrokerImpl.java:4117)
	at org.apache.openjpa.kernel.StateManagerImpl.initialize(StateManagerImpl.java:391)
	at org.apache.openjpa.kernel.StateManagerImpl.initialize(StateManagerImpl.java:340)
	at org.apache.openjpa.jdbc.kernel.JDBCStoreManager.initializeState(JDBCStoreManager.java:378)

It seems that this entity gets loaded from the db twice in the same query.

While hitting the problem, the StateManagers have the following _flags:

orig _flags= 602 = 0010 0101 1010 SAVE LOADED READ_LOCKED OID_ASSIGNED FLUSHED  
sm   _flags= 16  = 0000 0001 0000 READ_LOCKED

And it is really only 1 instance which makes this problem. If I set the 'orig' variable to
null in the debugger, the test runs fine.

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