[hibernate-issues] [Hibernate-JIRA] Created: (HHH-4864) "Cannot read files twice on NativeScanner" exception when using multiple persistence.xml

[Bouiaw (JIRA)]

"Cannot read files twice on NativeScanner" exception when using multiple persistence.xml
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                 Key: HHH-4864
                 URL: http://opensource.atlassian.com/projects/hibernate/browse/HHH-4864
             Project: Hibernate Core
          Issue Type: Bug
          Components: core
    Affects Versions: 3.5.0-Beta-3
            Reporter: Bouiaw


When subclassing DefaultPersistenceUnitManager as described in http://ancientprogramming.blogspot.com/2007/05/multiple-persistencexml-files-and.html in order to have my entities in different jars, Hibernate 3.5-Beta3 throw the following exception (it worked with previous version of Hibernate) :

java.lang.RuntimeException: error trying to scan <jar-file>: file:/Users/bouiaw/resthub/resthub-core/target/classes/
	at org.hibernate.ejb.Ejb3Configuration.scanForClasses(Ejb3Configuration.java:700)
	at org.hibernate.ejb.Ejb3Configuration.configure(Ejb3Configuration.java:465)
	at org.hibernate.ejb.HibernatePersistence.createContainerEntityManagerFactory(HibernatePersistence.java:165)
	at org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean.createNativeEntityManagerFactory(LocalContainerEntityManagerFactoryBean.java:225)
	at org.springframework.orm.jpa.AbstractEntityManagerFactoryBean.afterPropertiesSet(AbstractEntityManagerFactoryBean.java:288)
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1457)
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1397)
	... 51 more
Caused by: org.hibernate.AssertionFailure: Cannot read files twice on NativeScanner
	at org.hibernate.ejb.packaging.NativeScanner.getFilesInJar(NativeScanner.java:168)
	at org.hibernate.ejb.Ejb3Configuration.addScannedEntries(Ejb3Configuration.java:393)
	at org.hibernate.ejb.Ejb3Configuration.scanForClasses(Ejb3Configuration.java:697)
	... 57 more


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