[hibernate-issues] [Hibernate-JIRA] Created: (ANN-591) SchemaExport throws ConcurrentModificationException for entity containing list of lists

[Ivan O'Connor (JIRA)]

SchemaExport throws ConcurrentModificationException for entity containing list of lists
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                 Key: ANN-591
                 URL: http://opensource.atlassian.com/projects/hibernate/browse/ANN-591
             Project: Hibernate Annotations
          Issue Type: Bug
          Components: binder
    Affects Versions: 3.2.1
         Environment: Hibernate 3.2.1.GA, Oracle 10
            Reporter: Ivan O'Connor
         Attachments: hbm2ddl.zip

I have a class, let's call it A, that contains a List of class B. Each instance of B has a List of class C. I'm trying to generate the DDL for this, so I've annotated the code and run it through SchemaExport, which throws a ConcurrentModificationException. My environment: Java 1.5, Oracle 10, Hibernate 3.2.1ga.

The problem seems to be caused by having an entity (A) containing an embedded collection (of B), each element of which contains a collection (of C). SchemaExport generates correct DDL when the annotations are modified to make B and/or C an entity, but not when they are both components. I realise this is considered something of an exotic case, but I'd like to know why the DDL doesn't generate.

See bugReport.txt in attached zip for further details.

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