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https://issues.apache.org/jira/browse/OPENJPA-679?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12620757#action_12620757
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Fay Wang commented on OPENJPA-679:
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This problem is found by Gopalakrishnan U. A JIRA is open on behalf on him.
This problem may happen when a relation field is annotated as both a primary
key and a foreign key. When Openjpa resolves the class matedata, it first
resolves the primary keys of all the entities in the persistent unit. After the
primary keys of all the entities are resolved, it then goes ahead to resolve
the non-relation field. It is normally in the stage of resolving non-relation
fields that the foreign key is constructed.
Since a relation field is a primary key, it gets resolved in the first stage.
However, since it is also a relation field, the foreign key construction is
triggered when setting the strategy to this field. If the primary key
information of the parent entity is not yet available, some of the foreign key
fields will be missing. If it happens that the primary key information of the
parent entity is already resolved (just as some experiment shows by
manipulating the entity class name so that the primary key of the parent entity
gets resolved first before the child entity), then the foreign key constructed
in this stage will be good and complete.
> java.lang.ArrayIndexOutOfBoundsException may occur when a relation field is
> annotated as a primary key and a foreign key
> ------------------------------------------------------------------------------------------------------------------------
>
> Key: OPENJPA-679
> URL: https://issues.apache.org/jira/browse/OPENJPA-679
> Project: OpenJPA
> Issue Type: Bug
> Reporter: Fay Wang
>
> <openjpa-1.2.0-SNAPSHOT-rexported nonfatal general error>
> org.apache.openjpa.persistence.PersistenceException: 0
> at
> org.apache.openjpa.kernel.AbstractBrokerFactory.newBroker(AbstractBrokerFactory.java:196)
> at
> org.apache.openjpa.kernel.DelegatingBrokerFactory.newBroker(DelegatingBrokerFactory.java:142)
> at
> org.apache.openjpa.persistence.EntityManagerFactoryImpl.createEntityManager(EntityManagerFactoryImpl.java:192)
> at
> org.apache.openjpa.persistence.EntityManagerFactoryImpl.createEntityManager(EntityManagerFactoryImpl.java:145)
> ....
> Caused by: java.lang.ArrayIndexOutOfBoundsException: 0
> at
> org.apache.openjpa.jdbc.sql.DBDictionary.getForeignKeyConstraintSQL(DBDictionary.java:3373)
> at
> org.apache.openjpa.jdbc.sql.DBDictionary.getAddForeignKeySQL(DBDictionary.java:3252)
> at
> org.apache.openjpa.jdbc.schema.SchemaTool.addForeignKey(SchemaTool.java:1066)
> at org.apache.openjpa.jdbc.schema.SchemaTool.add(SchemaTool.java:604)
> at org.apache.openjpa.jdbc.schema.SchemaTool.add(SchemaTool.java:344)
> at org.apache.openjpa.jdbc.schema.SchemaTool.run(SchemaTool.java:321)
> at org.apache.openjpa.jdbc.meta.MappingTool.record(MappingTool.java:501)
> at org.apache.openjpa.jdbc.meta.MappingTool.record(MappingTool.java:453)
> at
> org.apache.openjpa.jdbc.kernel.JDBCBrokerFactory.synchronizeMappings(JDBCBrokerFactory.java:159)
> at
> org.apache.openjpa.jdbc.kernel.JDBCBrokerFactory.newBrokerImpl(JDBCBrokerFactory.java:119)
> at
> org.apache.openjpa.kernel.AbstractBrokerFactory.newBroker(AbstractBrokerFactory.java:189)
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