我正在构建一个JAR文件，使用带有验证器4.3.0.Final的Hibernate 4.1.5.SP1部署到JBoss 4.2.3.GA（无法帮助它）。数据库是MySQL 5.5。我在使用RESOURCE_LOCAL EntityManager执行基本选择时遇到问题。我有
for (final Order order : results) {
...
try {
session = (Session)em.getDelegate();
state = findStateByAbbrev(stateAbbrev, session);
} catch (HibernateException e) {
e.printStackTrace(System.err);
LOG.error(e.getMessage(), e);
} finally {
em.close();
} // try
} // for
private State findStateByAbbrev(final String abbrev, final Session session) {
State ret = null;
final Criteria crit = session.createCriteria(State.class).add(Restrictions.eq("abbrev", abbrev));
final List<State> results = crit.list();
if (results != null && results.size() > 0) {
ret = results.get(0);
} // if
return ret;
}
这是我的META-INF / persistence.xml文件......
<persistence>
<persistence-unit name="didoclientunit" transaction-type="RESOURCE_LOCAL">
<provider>org.hibernate.ejb.HibernatePersistence</provider>
<non-jta-data-source>java:/MySqlDS</non-jta-data-source>
<properties>
<property name="hibernate.ejb.cfgfile" value="hibernate.cfg.xml" />
<property name="hibernate.validator.apply_to_ddl">false</property>
<property name="hibernate.validator.autoregister_listeners">false</property>
<property name="hibernate.transaction.manager_lookup_class" value=" org/hibernate/transaction/TransactionManagerLookup"/> -->
</properties>
</persistence-unit>
</persistence>
这是hibernate配置文件......
<?xml version='1.0' encoding='utf-8'?>
<!DOCTYPE hibernate-configuration PUBLIC
"-//Hibernate/Hibernate Configuration DTD//EN"
"http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd">
<hibernate-configuration>
<session-factory>
<property name="hibernate.connection.driver_class">com.mysql.jdbc.Driver</property>
<property name="show_sql">true</property>
<property name="dialect">org.hibernate.dialect.MySQLDialect</property>
<!-- Enable Hibernate's automatic session context management -->
<property name="current_session_context_class">thread</property>
<mapping class="com.parentco.fdr.myproject.model.UserRole" />
<mapping class="com.parentco.fdr.myproject.model.Organization" />
<mapping class="com.parentco.fdr.myproject.model.Product" />
<mapping class="com.parentco.fdr.myproject.model.State" />
<mapping class="com.parentco.fdr.myproject.model.Country" />
<mapping class="com.parentco.fdr.myproject.model.AccessCode" />
<mapping class="com.parentco.fdr.myproject.model.Contract" />
<mapping class="com.parentco.fdr.myproject.model.TrainingLink" />
</session-factory>
</hibernate-configuration>
在第一个循环中，一切都很好，但第二次，我得到了这个例外。如果我不关闭EntityManager，我会在5分钟后（我的JBoss事务超时的长度）得到事务超时，所以我很困惑我应该如何编码。我想继续使用Hibernate的Criteria API。
java.lang.IllegalStateException: EntityManager is closed
at org.hibernate.ejb.EntityManagerImpl.close(EntityManagerImpl.java:58)
at org.mainco.subco.dido.service.OrderServiceImpl.getPDOrders(OrderServiceImpl.java:153)
at org.mainco.subco.dido.quartz.ProcessPDWorker.work(ProcessPDWorker.java:24)
at org.mainco.subco.dido.quartz.ProcessPDJob.execute(ProcessPDJob.java:42)
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 org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:112)
at org.jboss.ejb3.interceptor.InvocationContextImpl.proceed(InvocationContextImpl.java:166)
at org.jboss.ejb3.interceptor.EJB3InterceptorsInterceptor.invoke(EJB3InterceptorsInterceptor.java:63)
at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
at org.jboss.ejb3.entity.TransactionScopedEntityManagerInterceptor.invoke(TransactionScopedEntityManagerInterceptor.java:54)
at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
at org.jboss.ejb3.AllowedOperationsInterceptor.invoke(AllowedOperationsInterceptor.java:47)
at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
at org.jboss.aspects.tx.TxPolicy.invokeInCallerTx(TxPolicy.java:126)
at org.jboss.aspects.tx.TxInterceptor$Required.invoke(TxInterceptor.java:195)
at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
at org.jboss.ejb3.stateless.StatelessInstanceInterceptor.invoke(StatelessInstanceInterceptor.java:62)
at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
at org.jboss.ejb3.mdb.MessagingContainer.localInvoke(MessagingContainer.java:249)
at org.jboss.ejb3.mdb.inflow.MessageInflowLocalProxy.delivery(MessageInflowLocalProxy.java:268)
at org.jboss.ejb3.mdb.inflow.MessageInflowLocalProxy.invoke(MessageInflowLocalProxy.java:138)
at $Proxy83.execute(Unknown Source)
at org.jboss.resource.adapter.quartz.inflow.QuartzJob.execute(QuartzJob.java:57)
at org.quartz.core.JobRunShell.run(JobRunShell.java:203)
at org.quartz.simpl.SimpleThreadPool$WorkerThread.run(SimpleThreadPool.java:520)
谢谢， - 戴夫
编辑：尝试Tiago的响应有效，直到我的代码运行时间超过$ JBOSS_HOME / server / default // conf / jboss-service.xml中的设置
400
我开始后400秒，我得到了下面的例外
21:41:40,025 WARN [arjLoggerI18N] [com.arjuna.ats.arjuna.coordinator.BasicAction_58] - Abort of action id -3f57ff9c:ca5e:502dadac:34 invoked while multiple threads active within it.
21:41:40,026 WARN [arjLoggerI18N] [com.arjuna.ats.arjuna.coordinator.CheckedAction_2] - CheckedAction::check - atomic action -3f57ff9c:ca5e:502dadac:34 aborting with 1 threads active!
21:41:40,410 WARN [JDBCExceptionReporter] SQL Error: 0, SQLState: null
21:41:40,410 ERROR [JDBCExceptionReporter] Transaction is not active: tx=TransactionImple < ac, BasicAction: -3f57ff9c:ca5e:502dadac:34 status: ActionStatus.ABORTED >; - nested throwable: (javax.resource.ResourceException: Transaction is not active: tx=TransactionImple < ac, BasicAction: -3f57ff9c:ca5e:502dadac:34 status: ActionStatus.ABORTED >)
21:41:40,412 ERROR [STDERR] org.hibernate.exception.GenericJDBCException: Cannot open connection
at org.hibernate.exception.SQLStateConverter.handledNonSpecificException(SQLStateConverter.java:103)
at org.hibernate.exception.SQLStateConverter.convert(SQLStateConverter.java:91)
at org.hibernate.exception.JDBCExceptionHelper.convert(JDBCExceptionHelper.java:43)
at org.hibernate.exception.JDBCExceptionHelper.convert(JDBCExceptionHelper.java:29)
at org.hibernate.jdbc.ConnectionManager.openConnection(ConnectionManager.java:426)
at org.hibernate.jdbc.ConnectionManager.getConnection(ConnectionManager.java:144)
at org.hibernate.jdbc.AbstractBatcher.prepareQueryStatement(AbstractBatcher.java:139)
at org.hibernate.loader.Loader.prepareQueryStatement(Loader.java:1547)
at org.hibernate.loader.Loader.doQuery(Loader.java:673)
at org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:236)
at org.hibernate.loader.Loader.doList(Loader.java:2220)
at org.hibernate.loader.Loader.listIgnoreQueryCache(Loader.java:2104)
at org.hibernate.loader.Loader.list(Loader.java:2099)
at org.hibernate.loader.criteria.CriteriaLoader.list(CriteriaLoader.java:94)
at org.hibernate.impl.SessionImpl.list(SessionImpl.java:1569)
at org.hibernate.impl.CriteriaImpl.list(CriteriaImpl.java:283)
at org.mainco.subco.dido.service.OrderServiceImpl.findStateByAbbrev(OrderServiceImpl.java:450)
at org.mainco.subco.dido.service.OrderServiceImpl.getPDOrders(OrderServiceImpl.java:144)
at org.mainco.subco.dido.quartz.ProcessPDWorker.work(ProcessPDWorker.java:24)
at org.mainco.subco.dido.quartz.ProcessPDJob.execute(ProcessPDJob.java:42)
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 org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:112)
at org.jboss.ejb3.interceptor.InvocationContextImpl.proceed(InvocationContextImpl.java:166)
at org.jboss.ejb3.interceptor.EJB3InterceptorsInterceptor.invoke(EJB3InterceptorsInterceptor.java:63)
at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
at org.jboss.ejb3.entity.TransactionScopedEntityManagerInterceptor.invoke(TransactionScopedEntityManagerInterceptor.java:54)
at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
at org.jboss.ejb3.AllowedOperationsInterceptor.invoke(AllowedOperationsInterceptor.java:47)
at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
at org.jboss.aspects.tx.TxPolicy.invokeInCallerTx(TxPolicy.java:126)
at org.jboss.aspects.tx.TxInterceptor$Required.invoke(TxInterceptor.java:195)
at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
at org.jboss.ejb3.stateless.StatelessInstanceInterceptor.invoke(StatelessInstanceInterceptor.java:62)
at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
at org.jboss.ejb3.mdb.MessagingContainer.localInvoke(MessagingContainer.java:249)
at org.jboss.ejb3.mdb.inflow.MessageInflowLocalProxy.delivery(MessageInflowLocalProxy.java:268)
at org.jboss.ejb3.mdb.inflow.MessageInflowLocalProxy.invoke(MessageInflowLocalProxy.java:138)
at $Proxy83.execute(Unknown Source)
at org.jboss.resource.adapter.quartz.inflow.QuartzJob.execute(QuartzJob.java:57)
at org.quartz.core.JobRunShell.run(JobRunShell.java:203)
at org.quartz.simpl.SimpleThreadPool$WorkerThread.run(SimpleThreadPool.java:520)
答案 0 :(得分：1)
您收到的错误仅仅是因为您正在 for 循环中的 finally 构造中关闭EntityManager。因此，当您第二次尝试拨打em.getDelegate()时，您的EM已经关闭。不，您不想手动关闭它。你会有类似的东西：
session = (Session)em.getDelegate();
for (final Order order : results) {
...
try {
state = findStateByAbbrev(stateAbbrev, session);
} catch (HibernateException e) {
e.printStackTrace(System.err);
LOG.error(e.getMessage(), e);
}
} // for
至于超时的问题，也许你正面临JPA和Hibernate之间的常见问题。看看this post，这可能会对您有所帮助。也许问题是你从EM获得Hibernate Session的方式。此外，this question涉及同样的问题。
如果这些都没有帮助，只需在下面写下评论或编辑您的问题，指明何时超时。