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When a "properties" element is defined in the mapping file, for example: <properties name="refkey"> <property name="field1" type="java.lang.String" column="column3" not-null="true" length="20" /> <property name="field2" type="java.lang.String" column="column4" not-null="true" /> </properties> The system throws errors: 14:36:32,052 TRACE [org.hibernate.ejb.metamodel.AttributeFactory] (ServerService Thread Pool – 48) Starting attribute metadata determination [refkey] 14:36:32,052 TRACE [org.hibernate.ejb.metamodel.AttributeFactory] (ServerService Thread Pool – 48) Determined member [null] 14:36:32,052 TRACE [org.hibernate.ejb.metamodel.AttributeFactory] (ServerService Thread Pool – 48) Determined type [name=component[field1,field2], class=org.hibernate.type.EmbeddedComponentType] 14:36:32,053 TRACE [org.hibernate.ejb.metamodel.MetadataContext] (ServerService Thread Pool – 48) Completed entity [org.hibernate.issue.EntityClass1] 14:36:32,053 ERROR [org.jboss.msc.service.fail] (ServerService Thread Pool – 48) MSC000001: Failed to start service jboss.persistenceunit."hibernateissue-jar-0.0.1-SNAPSHOT.jar#myPU": org.jboss.msc.service.StartException in service jboss.persistenceunit."hibernateissue-jar-0.0.1-SNAPSHOT.jar#myPU": java.lang.IllegalArgumentException: Cannot determine java-type from given member [null] at org.jboss.as.jpa.service.PersistenceUnitServiceImpl$1.run(PersistenceUnitServiceImpl.java:103) [jboss-as-jpa-7.2.1.Final-redhat-10.jar:7.2.1.Final-redhat-10] at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886) [rt.jar:1.6.0_37] at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908) [rt.jar:1.6.0_37] at java.lang.Thread.run(Thread.java:662) [rt.jar:1.6.0_37] at org.jboss.threads.JBossThread.run(JBossThread.java:122) [jboss-threads-2.1.0.Final-redhat-1.jar:2.1.0.Final-redhat-1] Caused by: java.lang.IllegalArgumentException: Cannot determine java-type from given member [null] at org.hibernate.ejb.metamodel.AttributeFactory$BaseAttributeMetadata.<init>(AttributeFactory.java:589) at org.hibernate.ejb.metamodel.AttributeFactory$SingularAttributeMetadataImpl.<init>(AttributeFactory.java:677) at org.hibernate.ejb.metamodel.AttributeFactory$SingularAttributeMetadataImpl.<init>(AttributeFactory.java:667) at org.hibernate.ejb.metamodel.AttributeFactory.determineAttributeMetadata(AttributeFactory.java:531) at org.hibernate.ejb.metamodel.AttributeFactory.buildAttribute(AttributeFactory.java:98) at org.hibernate.ejb.metamodel.MetadataContext.wrapUp(MetadataContext.java:212) at org.hibernate.ejb.metamodel.MetamodelImpl.buildMetamodel(MetamodelImpl.java:88) at org.hibernate.ejb.EntityManagerFactoryImpl.<init>(EntityManagerFactoryImpl.java:104) at org.hibernate.ejb.Ejb3Configuration.buildEntityManagerFactory(Ejb3Configuration.java:920) at org.hibernate.ejb.Ejb3Configuration.buildEntityManagerFactory(Ejb3Configuration.java:904) at org.hibernate.ejb.HibernatePersistence.createContainerEntityManagerFactory(HibernatePersistence.java:92) at org.jboss.as.jpa.service.PersistenceUnitServiceImpl.createContainerEntityManagerFactory(PersistenceUnitServiceImpl.java:200) [jboss-as-jpa-7.2.1.Final-redhat-10.jar:7.2.1.Final-redhat-10] at org.jboss.as.jpa.service.PersistenceUnitServiceImpl.access$600(PersistenceUnitServiceImpl.java:57) [jboss-as-jpa-7.2.1.Final-redhat-10.jar:7.2.1.Final-redhat-10] at org.jboss.as.jpa.service.PersistenceUnitServiceImpl$1.run(PersistenceUnitServiceImpl.java:99) [jboss-as-jpa-7.2.1.Final-redhat-10.jar:7.2.1.Final-redhat-10] ... 4 more This issue is very similar to https://hibernate.atlassian.net/browse/HHH-4870 Please check https://hibernate.atlassian.net/browse/HHH-8689 for more details.
The test case fails on ORM 4.2.0 (EAP 6.1), but passes on 4.2.1. It appears that https://hibernate.atlassian.net/browse/HHH-7714 implicitly fixed this in ORM 4.2.1 and is therefore already corrected in EAP 6.2.