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From "B.J. Reed (JIRA)" <>
Subject [jira] Created: (OPENJPA-1508) ArrayIndexOutOfBoundsException being thrown from ClassMetaData.getExtraFieldDataIndex()
Date Fri, 12 Feb 2010 20:18:28 GMT
ArrayIndexOutOfBoundsException being thrown from ClassMetaData.getExtraFieldDataIndex()

                 Key: OPENJPA-1508
             Project: OpenJPA
          Issue Type: Bug
          Components: jdbc
    Affects Versions: 1.2.2
         Environment: found this on DB2, but I imagine it doesn't matter
            Reporter: B.J. Reed
             Fix For: 1.2.3, 1.3.0, 2.0.1, 2.1.0

An ArrayIndexOutOfBoundsException is being thrown by ClassMetaData.getExtraFieldDataIndex()

I am providing a test case.  The only thing special is that the entities are set up in a hexagon
shape, where the entities above have a OneToMany relationship with those below.  The one at
the very bottom has ManyToOne relationships with the two entities above it and I think this
seems to be the cause of the problem.

I have done some debugging on this and here is where I have gotten to:

The problem is somewhere around the JDBCStoreManager.initializeState method

first time through, the mapping object is org.apache.openjpa.persistence.jdbc.query.HexagonBottom
and the mappedByFieldMapping is 
org.apache.openjpa.persistence.jdbc.query.HexagonBottom.lowerLeftId  (looks good), index is
second time through, the mapping object is org.apache.openjpa.persistence.jdbc.query.HexagonLowerRight
 and the mappedByFieldMapping is still org.apache.openjpa.persistence.jdbc.query.HexagonBottom.lowerLeftId,
so the index is still 6, but the HexagonLowerRight object only has 4 fields in it so the exception
is thrown.

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