最近，我所在的其他开发人员已经从3.？升级了我们老化的Hibernate依赖关系。？（可能是3.5？）到5.0。不久之后，他们注意到DBCP检测到了连接泄漏。我的任务是试图诊断病因。
我决定尝试升级Spring，因为这被忽视了，我已经更换了所有相关的jar，从3.0.5升级到了4.2.5，现在我看到了一个我无法解决的不同问题。
根据jar中的MANIFEST.MF文件，我们将JOTM用于JTA，目前正在使用2.0.11版本。有了这个版本，再加上更新的Hibernate和Spring，我看到了以下内容：
org.hibernate.engine.transaction.jta.platform.spi.JtaPlatformException: Could not obtain JOTM transaction manager instance
at org.hibernate.engine.transaction.jta.platform.internal.JOTMJtaPlatform.locateTransactionManager(JOTMJtaPlatform.java:31)
at org.hibernate.engine.transaction.jta.platform.internal.AbstractJtaPlatform.retrieveTransactionManager(AbstractJtaPlatform.java:92)
at org.hibernate.engine.transaction.jta.platform.internal.AbstractJtaPlatform.getTransactionManager(AbstractJtaPlatform.java:98)
at org.hibernate.engine.transaction.jta.platform.internal.TransactionManagerBasedSynchronizationStrategy.canRegisterSynchronization(TransactionManagerBasedSynchronizationStrategy.java:39)
at org.hibernate.engine.transaction.jta.platform.internal.AbstractJtaPlatform.canRegisterSynchronization(AbstractJtaPlatform.java:131)
at org.hibernate.resource.transaction.backend.jta.internal.JtaTransactionCoordinatorImpl.pulse(JtaTransactionCoordinatorImpl.java:141)
at org.hibernate.resource.transaction.backend.jta.internal.JtaTransactionCoordinatorImpl.<init>(JtaTransactionCoordinatorImpl.java:92)
at org.hibernate.resource.transaction.backend.jta.internal.JtaTransactionCoordinatorBuilderImpl.buildTransactionCoordinator(JtaTransactionCoordinatorBuilderImpl.java:28)
at org.hibernate.internal.SessionImpl.<init>(SessionImpl.java:274)
at org.hibernate.internal.SessionFactoryImpl$SessionBuilderImpl.openSession(SessionFactoryImpl.java:1327)
at org.hibernate.jpa.internal.EntityManagerImpl.internalGetSession(EntityManagerImpl.java:133)
at org.hibernate.jpa.spi.AbstractEntityManagerImpl.postInit(AbstractEntityManagerImpl.java:174)
at org.hibernate.jpa.internal.EntityManagerImpl.<init>(EntityManagerImpl.java:83)
at org.hibernate.jpa.internal.EntityManagerFactoryImpl.internalCreateEntityManager(EntityManagerFactoryImpl.java:319)
at org.hibernate.jpa.internal.EntityManagerFactoryImpl.createEntityManager(EntityManagerFactoryImpl.java:286)
at sun.reflect.GeneratedMethodAccessor399.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:606)
at org.springframework.orm.jpa.AbstractEntityManagerFactoryBean.invokeProxyMethod(AbstractEntityManagerFactoryBean.java:407)
at org.springframework.orm.jpa.AbstractEntityManagerFactoryBean$ManagedEntityManagerFactoryInvocationHandler.invoke(AbstractEntityManagerFactoryBean.java:560)
at com.sun.proxy.$Proxy243.createEntityManager(Unknown Source)
at org.springframework.orm.jpa.EntityManagerFactoryUtils.doGetTransactionalEntityManager(EntityManagerFactoryUtils.java:285)
at org.springframework.orm.jpa.SharedEntityManagerCreator$SharedEntityManagerInvocationHandler.invoke(SharedEntityManagerCreator.java:255)
at com.sun.proxy.$Proxy271.createQuery(Unknown Source)
at com.company.app.persistence.AbstractEntityGroupDAO.getSomething(AbstractEntityGroupDAO.java:80)
at com.company.app.servicehealth.StatusServiceDAO.retrieveStatusServices(StatusServiceDAO.java:259)
at com.company.app.servicehealth.StatusServiceDAO.queryForStatusServices(StatusServiceDAO.java:255)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:606)
at org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:302)
at org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:190)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:157)
at org.springframework.transaction.interceptor.TransactionInterceptor$1.proceedWithInvocation(TransactionInterceptor.java:99)
at org.springframework.transaction.interceptor.TransactionAspectSupport.invokeWithinTransaction(TransactionAspectSupport.java:281)
at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:96)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)
at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:208)
at com.sun.proxy.$Proxy273.queryForStatusServices(Unknown Source)
at com.company.app.servicehealth.ServiceHealthStatusImpl$1.doInTransaction(ServiceHealthStatusImpl.java:142)
... 50 more
Caused by: java.lang.NullPointerException
at org.hibernate.engine.transaction.jta.platform.internal.JOTMJtaPlatform.locateTransactionManager(JOTMJtaPlatform.java:26)
... 90 more
经过检查，在我看来，这就像serviceRegistry()或serviceRegistry().getService( ClassLoaderService.class )正在返回null。（以下是所讨论方法的内容）
public static final String TM_CLASS_NAME = "org.objectweb.jotm.Current";
public static final String UT_NAME = "java:comp/UserTransaction";
@Override
protected TransactionManager locateTransactionManager() {
try {
final Class tmClass = serviceRegistry().getService( ClassLoaderService.class ).classForName( TM_CLASS_NAME );
final Method getTransactionManagerMethod = tmClass.getMethod( "getTransactionManager" );
return (TransactionManager) getTransactionManagerMethod.invoke( null, (Object[]) null );
}
catch (Exception e) {
throw new JtaPlatformException( "Could not obtain JOTM transaction manager instance", e );
}
}
我该如何着手解决这个问题？我是Spring的新手，我只能说我们使用的是JPA（EntityManager），而不是Hibernate的SessionFactory。
听起来像是一个依赖性问题。在POM依赖层次结构中（假设您使用Maven），检查类路径中是否有多个版本的Hibernate。您可能需要考虑尝试Hibernate 4.3.11.Final而不是5.x。