[hibernate-issues] [Hibernate-JIRA] Commented: (ANN-591) SchemaExport throws ConcurrentModificationException for entity containing list of lists
Daniel Fielder (JIRA)
noreply at atlassian.com
Tue Sep 18 23:52:14 EDT 2007
[ http://opensource.atlassian.com/projects/hibernate/browse/ANN-591?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_28132 ]
Daniel Fielder commented on ANN-591:
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Any update on this issue? I don't think this is very exotic at all - I ran into this right away modeling a domain model that describes an asset tracking system. A User has a list of accounts, each of which has a list of assets. If the accounts and assets are modeled as components, which Hibernate In Action stresses is the easiest way, then the ConcurrentModificationException is generated while executing SchemaExport.
> SchemaExport throws ConcurrentModificationException for entity containing list of lists
> ---------------------------------------------------------------------------------------
>
> 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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