Java JPA与Jboss异常 如何解决此异常？？

有人能告诉我为什么我会出现这种异常情况吗：

配置：

           jdk1.6
           Jboss4.2
           JPA provider: OpenJpa
           EclipseIDE

完整堆栈跟踪：

 java.lang.reflect.InvocationTargetException
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at sun.instrument.InstrumentationImpl.loadClassAndStartAgent(InstrumentationImpl.java:323)
at sun.instrument.InstrumentationImpl.loadClassAndCallPremain(InstrumentationImpl.java:338)
Caused by: java.util.MissingResourceException: org.apache.openjpa.persistence.PersistenceProductDerivation:java.lang.NoSuchMethodError: javax.persistence.spi.PersistenceUnitInfo.getValidationMode()Ljavax/persistence/ValidationMode;
at org.apache.openjpa.lib.conf.ProductDerivations.reportErrors(ProductDerivations.java:380)
at org.apache.openjpa.lib.conf.ProductDerivations.load(ProductDerivations.java:283)
at org.apache.openjpa.lib.conf.Configurations.populateConfiguration(Configurations.java:357)
at org.apache.openjpa.enhance.PCEnhancerAgent.registerClassLoadEnhancer(PCEnhancerAgent.java:165)
at org.apache.openjpa.enhance.PCEnhancerAgent.premain(PCEnhancerAgent.java:145)
... 6 more
Caused by: java.lang.NoSuchMethodError: javax.persistence.spi.PersistenceUnitInfo.getValidationMode()Ljavax/persistence/ValidationMode;
FATAL ERROR in native method: processing of -javaagent failed
at org.apache.openjpa.persistence.PersistenceUnitInfoImpl.toOpenJPAProperties(PersistenceUnitInfoImpl.java:477)
at org.apache.openjpa.persistence.PersistenceUnitInfoImpl.toOpenJPAProperties(PersistenceUnitInfoImpl.java:359)
at org.apache.openjpa.persistence.PersistenceProductDerivation.load(PersistenceProductDerivation.java:541)
at org.apache.openjpa.persistence.PersistenceProductDerivation.load(PersistenceProductDerivation.java:360)
at org.apache.openjpa.lib.conf.ProductDerivations.load(ProductDerivations.java:274)
... 9 more
Exception in thread "main" 

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陈述显而易见的。。。使用中的OpenJPA版本需要JPA2，JBoss4.x提供了JPA1 API jar。。。因此，没有找到JPA2方法是一个例外。使用JPA和JPA实现的一致版本

发生此异常时，您具体在做什么？感谢它的帮助。。。Jpa jar缺少与持久性相关的东西