1.异常信息

Caused by: java.lang.IllegalArgumentException: JBAS011470: Persistence unitName was not specified and there are 2 persistence unit definitions in application deployment "".  Either change the application to have only one persistence unit definition or specify the unitName for each reference to a persistence unit.at org.jboss.as.jpa.container.PersistenceUnitSearch.resolvePersistenceUnitSupplier(PersistenceUnitSearch.java:69)at org.jboss.as.jpa.processor.JPAAnnotationParseProcessor.getPersistenceUnit(JPAAnnotationParseProcessor.java:284)at org.jboss.as.jpa.processor.JPAAnnotationParseProcessor.getBindingSource(JPAAnnotationParseProcessor.java:220)at org.jboss.as.jpa.processor.JPAAnnotationParseProcessor.processMethod(JPAAnnotationParseProcessor.java:186)at org.jboss.as.jpa.processor.JPAAnnotationParseProcessor.processPersistenceAnnotations(JPAAnnotationParseProcessor.java:123)at org.jboss.as.jpa.processor.JPAAnnotationParseProcessor.deploy(JPAAnnotationParseProcessor.java:90)at org.jboss.as.server.deployment.DeploymentUnitPhaseService.start(DeploymentUnitPhaseService.java:113) [jboss-as-server-7.1.1.Final.jar:7.1.1.Final]

2.问题原因

1）JBoss在部署应用时，会校验所有被@PersistenceContext、@PersistenceUnit注解了的类、方法及属性

2）在应用中如有有多个persistence units，JBoss会校验所有的注解是否都有unitName

public void deploy(DeploymentPhaseContext phaseContext)throws DeploymentUnitProcessingException{DeploymentUnit deploymentUnit = phaseContext.getDeploymentUnit();EEModuleDescription eeModuleDescription = (EEModuleDescription)deploymentUnit.getAttachment(org.jboss.as.ee.component.Attachments.EE_MODULE_DESCRIPTION);CompositeIndex index = (CompositeIndex)deploymentUnit.getAttachment(org.jboss.as.server.deployment.Attachments.COMPOSITE_ANNOTATION_INDEX);EEApplicationClasses applicationClasses = (EEApplicationClasses)deploymentUnit.getAttachment(org.jboss.as.ee.component.Attachments.EE_APPLICATION_CLASSES_DESCRIPTION);List persistenceContexts = index.getAnnotations(PERSISTENCE_CONTEXT_ANNOTATION_NAME);processPersistenceAnnotations(deploymentUnit, eeModuleDescription, persistenceContexts, applicationClasses);List persistenceUnits = index.getAnnotations(PERSISTENCE_UNIT_ANNOTATION_NAME);processPersistenceAnnotations(deploymentUnit, eeModuleDescription, persistenceUnits, applicationClasses);if ((!persistenceContexts.isEmpty()) || (!persistenceUnits.isEmpty()))JPADeploymentMarker.mark(deploymentUnit);}

3）spring-data-jpa的jar包中的JpaRepositoryFactoryBean类中有个表有@PersistenceContext注解的方法，且未指明unitName，所以无法通过JBoss的校验

public class JpaRepositoryFactoryBean<T extends Repository<S, ID>, S, ID extends Serializable> extends TransactionalRepositoryFactoryBeanSupport<T, S, ID>
{private EntityManager entityManager;@PersistenceContextpublic void setEntityManager(EntityManager entityManager){this.entityManager = entityManager;}

3.问题处理

在JBoss7.1版本中，以上问题无法解决，根据JBoss的JIRA上的信息，这个问题在7.2.0.Final版本中修复

4.参考资料

1）multilpe persistence units with spring-data-jpa will not deploy to JBoss AS Server

2）PersistenceUnitSearch violates the JPA spec