spring2.56+openjpa1.22 org.apache.openjpa.persistence.PersistenceException:null

近期在做spring 2.5整合openjpa 1.22 demo 加spring事务时就会报如下错误，大家帮忙看看是什么原因：org.springframework.orm.jpa.JpaSystemException: nested exception is <openjpa-1.2.2-r422266:898935 nonfatal general error> org.apache.openjpa.persistence.PersistenceException: null
at org.springframework.orm.jpa.EntityManagerFactoryUtils.convertJpaAccessExceptionIfPossible(EntityManagerFactoryUtils.java:296)
at org.springframework.orm.jpa.DefaultJpaDialect.translateExceptionIfPossible(DefaultJpaDialect.java:120)
at org.springframework.orm.jpa.JpaTransactionManager.doCommit(JpaTransactionManager.java:460)
at org.springframework.transaction.support.AbstractPlatformTransactionManager.processCommit(AbstractPlatformTransactionManager.java:709)
at org.springframework.transaction.support.AbstractPlatformTransactionManager.commit(AbstractPlatformTransactionManager.java:678)
at org.springframework.transaction.interceptor.TransactionAspectSupport.commitTransactionAfterReturning(TransactionAspectSupport.java:321)
at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:116)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:171)
at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:204)
at $Proxy6.getDepartmentById(Unknown Source)
at com.boco.test.JpaJunitTest.testSpringJPA(JpaJunitTest.java:19)
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 junit.framework.TestCase.runTest(TestCase.java:164)
at junit.framework.TestCase.runBare(TestCase.java:130)
at junit.framework.TestResult$1.protect(TestResult.java:106)
at junit.framework.TestResult.runProtected(TestResult.java:124)
at junit.framework.TestResult.run(TestResult.java:109)
at junit.framework.TestCase.run(TestCase.java:120)
at junit.framework.TestSuite.runTest(TestSuite.java:230)
at junit.framework.TestSuite.run(TestSuite.java:225)
at org.eclipse.jdt.internal.junit.runner.junit3.JUnit3TestReference.run(JUnit3TestReference.java:130)
at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:467)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:683)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:390)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:197)
Caused by: <openjpa-1.2.2-r422266:898935 nonfatal general error> org.apache.openjpa.persistence.PersistenceException: null
at org.apache.openjpa.kernel.BrokerImpl.beforeCompletion(BrokerImpl.java:1853)
at org.apache.openjpa.kernel.LocalManagedRuntime.commit(LocalManagedRuntime.java:81)
at org.apache.openjpa.kernel.BrokerImpl.commit(BrokerImpl.java:1369)
at org.apache.openjpa.kernel.DelegatingBroker.commit(DelegatingBroker.java:877)
at org.apache.openjpa.persistence.EntityManagerImpl.commit(EntityManagerImpl.java:512)
at org.springframework.orm.jpa.JpaTransactionManager.doCommit(JpaTransactionManager.java:456)
... 26 more
Caused by: java.util.ConcurrentModificationException
at java.util.HashMap$HashIterator.nextEntry(HashMap.java:793)
at java.util.HashMap$KeyIterator.next(HashMap.java:828)
at org.apache.openjpa.kernel.ManagedCache.dirtyCheck(ManagedCache.java:307)
at org.apache.openjpa.kernel.BrokerImpl.hasTransactionalObjects(BrokerImpl.java:3820)
at org.apache.openjpa.kernel.BrokerImpl.getTransactionalStates(BrokerImpl.java:3809)
at org.apache.openjpa.kernel.BrokerImpl.flush(BrokerImpl.java:1946)
at org.apache.openjpa.kernel.BrokerImpl.flushSafe(BrokerImpl.java:1927)
at org.apache.openjpa.kernel.BrokerImpl.beforeCompletion(BrokerImpl.java:1845)
... 31 moreapplication-config-jpa.xml<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:aop="http://www.springframework.org/schema/aop" 
xmlns:tx="http://www.springframework.org/schema/tx"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="
http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-2.5.xsd
http://www.springframework.org/schema/aop
http://www.springframework.org/schema/aop/spring-aop-2.5.xsd
http://www.springframework.org/schema/tx
http://www.springframework.org/schema/tx/spring-tx-2.5.xsd">
<!-- **************** c3p0 poole datasource config **************** -->
<bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource"
.....
</bean>
<!-- *************************JPA EntityManagerFactory ****************************** -->
<bean id="entityManagerFactory"
class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean">
<property name="persistenceUnitName" value="JPADemo"/>
<property name="dataSource" ref="dataSource" />
<property name="jpaVendorAdapter">
<bean class="org.springframework.orm.jpa.vendor.OpenJpaVendorAdapter">
<property name="showSql">
<value>${openjpa.show_sql}</value>
</property>
<property name="generateDdl">
<value>${openjpa.generate_ddl}</value>
</property>
<property name="database">
<value>${openjpa.database}</value>
</property>
<property name="databasePlatform">
<value>${openjpa.database.platform}</value>
</property>
</bean>
</property>
<property name="jpaPropertyMap">
<map>
<entry key="openjpa.MaxFetchDepth">
<value>${openjpa.max_fetch_depth}</value>
</entry>
<entry key="openjpa.Log">
<value>${openjpa.log}</value>
</entry>
</map>
</property>
<property name="jpaDialect">
<bean class="org.springframework.orm.jpa.vendor.OpenJpaDialect"/>
</property>
<property name="loadTimeWeaver">
<bean
class="org.springframework.instrument.classloading.SimpleLoadTimeWeaver" />
</property>
</bean>
<bean
class="org.springframework.orm.jpa.support.PersistenceAnnotationBeanPostProcessor" />
<bean
class="org.springframework.aop.framework.autoproxy.DefaultAdvisorAutoProxyCreator" />
</beans>applicationContext.xml 片段
.....
<!-- ###### transaction config ###### -->
<bean id="transactionInterceptor" class="org.springframework.transaction.interceptor.TransactionInterceptor">
    <property name="transactionManager" ref="transactionManager" />
    <property name="transactionAttributeSource">
<bean class="org.springframework.transaction.annotation.AnnotationTransactionAttributeSource" />
   </property>
</bean>
<bean class="org.springframework.transaction.interceptor.TransactionAttributeSourceAdvisor">
<property name="transactionInterceptor" ref="transactionInterceptor" />
</bean>
<bean id="transactionManager" class="org.springframework.orm.jpa.JpaTransactionManager" lazy-init="true" autowire="byName">
<property name="entityManagerFactory" ref="entityManagerFactory" />
<property name="dataSource" ref="dataSource" />
</bean>
<tx:annotation-driven transaction-manager="transactionManager"/>
....