事务在当前线程中不活跃

Question

我不断收到错误消息 Transaction is not active in the current thread 我想不出解决此问题的方法。在我按下应该发出将数据插入数据库的方法的按钮之前，此错误在页面加载时不断发生。 下面我输入了我的代码：

    public String bookLesson(int lessonNo) throws Exception{
    try{
        Booking booking = new Booking();
        Lesson lesson = em.find(Lesson.class, lessonNo);
        booking.setLessonno(lesson);
        booking.setCustomername(customerName);
        booking.setCustomerphone(customerPhone);
        utx.begin();
        em.persist(booking);
        utx.commit();
    } catch (Exception e){
        utx.rollback();
        System.out.println(e);
    }
    return "lesson";
}

该方法是从网页 h:button 调用的，因此一旦用户将他们的姓名和电话号码输入到文本框中，这些文本框将有望传递到数据库。如果这些信息有帮助，我也在使用 glassfish 服务器！ 这里也是错误页面返回的堆栈跟踪的副本

java.lang.IllegalStateException: Transaction is not active in the current thread.
at com.sun.enterprise.transaction.jts.JavaEETransactionManagerJTSDelegate.validateTransactionManager(JavaEETransactionManagerJTSDelegate.java:447)
at com.sun.enterprise.transaction.jts.JavaEETransactionManagerJTSDelegate.rollbackDistributedTransaction(JavaEETransactionManagerJTSDelegate.java:208)
at com.sun.enterprise.transaction.JavaEETransactionManagerSimplified.rollback(JavaEETransactionManagerSimplified.java:892)
at com.sun.enterprise.transaction.UserTransactionImpl.rollback(UserTransactionImpl.java:238)
at bean.bookingBean.bookLesson(bookingBean.java:146)
at bean.bookingBean$Proxy$_$$_WeldClientProxy.bookLesson(Unknown Source)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at javax.el.ELUtil.invokeMethod(ELUtil.java:326)
at javax.el.BeanELResolver.invoke(BeanELResolver.java:536)
at javax.el.CompositeELResolver.invoke(CompositeELResolver.java:256)
at com.sun.el.parser.AstValue.getValue(AstValue.java:136)
at com.sun.el.parser.AstValue.getValue(AstValue.java:204)
at com.sun.el.ValueExpressionImpl.getValue(ValueExpressionImpl.java:226)
at org.jboss.weld.el.WeldValueExpression.getValue(WeldValueExpression.java:50)
at com.sun.faces.facelets.el.TagValueExpression.getValue(TagValueExpression.java:109)
at javax.faces.component.ComponentStateHelper.eval(ComponentStateHelper.java:194)
at javax.faces.component.ComponentStateHelper.eval(ComponentStateHelper.java:182)
at javax.faces.component.UIOutcomeTarget.getOutcome(UIOutcomeTarget.java:164)
at com.sun.faces.renderkit.html_basic.OutcomeTargetRenderer.getNavigationCase(OutcomeTargetRenderer.java:136)
at com.sun.faces.renderkit.html_basic.OutcomeTargetButtonRenderer.encodeBegin(OutcomeTargetButtonRenderer.java:90)
at javax.faces.component.UIComponentBase.encodeBegin(UIComponentBase.java:869)
at com.sun.faces.renderkit.html_basic.HtmlBasicRenderer.encodeRecursive(HtmlBasicRenderer.java:302)
at com.sun.faces.renderkit.html_basic.TableRenderer.renderRow(TableRenderer.java:385)
at com.sun.faces.renderkit.html_basic.TableRenderer.encodeChildren(TableRenderer.java:162)
at javax.faces.component.UIComponentBase.encodeChildren(UIComponentBase.java:894)
at javax.faces.component.UIComponent.encodeAll(UIComponent.java:1856)
at javax.faces.render.Renderer.encodeChildren(Renderer.java:176)
at javax.faces.component.UIComponentBase.encodeChildren(UIComponentBase.java:894)
at javax.faces.component.UIComponent.encodeAll(UIComponent.java:1856)
at javax.faces.component.UIComponent.encodeAll(UIComponent.java:1859)
at javax.faces.component.UIComponent.encodeAll(UIComponent.java:1859)
at javax.faces.component.UIComponent.encodeAll(UIComponent.java:1859)
at com.sun.faces.application.view.FaceletViewHandlingStrategy.renderView(FaceletViewHandlingStrategy.java:443)
at com.sun.faces.application.view.MultiViewHandler.renderView(MultiViewHandler.java:131)
at javax.faces.application.ViewHandlerWrapper.renderView(ViewHandlerWrapper.java:337)
at com.sun.faces.lifecycle.RenderResponsePhase.execute(RenderResponsePhase.java:120)
at com.sun.faces.lifecycle.Phase.doPhase(Phase.java:101)
at com.sun.faces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:219)
at javax.faces.webapp.FacesServlet.service(FacesServlet.java:647)
at org.apache.catalina.core.StandardWrapper.service(StandardWrapper.java:1682)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:318)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:160)
at org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:734)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:673)
at com.sun.enterprise.web.WebPipeline.invoke(WebPipeline.java:99)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:174)
at org.apache.catalina.connector.CoyoteAdapter.doService(CoyoteAdapter.java:357)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:260)
at com.sun.enterprise.v3.services.impl.ContainerMapper.service(ContainerMapper.java:188)
at org.glassfish.grizzly.http.server.HttpHandler.runService(HttpHandler.java:191)
at org.glassfish.grizzly.http.server.HttpHandler.doHandle(HttpHandler.java:168)
at org.glassfish.grizzly.http.server.HttpServerFilter.handleRead(HttpServerFilter.java:189)
at org.glassfish.grizzly.filterchain.ExecutorResolver$9.execute(ExecutorResolver.java:119)
at org.glassfish.grizzly.filterchain.DefaultFilterChain.executeFilter(DefaultFilterChain.java:288)
at org.glassfish.grizzly.filterchain.DefaultFilterChain.executeChainPart(DefaultFilterChain.java:206)
at org.glassfish.grizzly.filterchain.DefaultFilterChain.execute(DefaultFilterChain.java:136)
at org.glassfish.grizzly.filterchain.DefaultFilterChain.process(DefaultFilterChain.java:114)
at org.glassfish.grizzly.ProcessorExecutor.execute(ProcessorExecutor.java:77)
at org.glassfish.grizzly.nio.transport.TCPNIOTransport.fireIOEvent(TCPNIOTransport.java:838)
at org.glassfish.grizzly.strategies.AbstractIOStrategy.fireIOEvent(AbstractIOStrategy.java:113)
at org.glassfish.grizzly.strategies.WorkerThreadIOStrategy.run0(WorkerThreadIOStrategy.java:115)
at org.glassfish.grizzly.strategies.WorkerThreadIOStrategy.access$100(WorkerThreadIOStrategy.java:55)
at org.glassfish.grizzly.strategies.WorkerThreadIOStrategy$WorkerThreadRunnable.run(WorkerThreadIOStrategy.java:135)
at org.glassfish.grizzly.threadpool.AbstractThreadPool$Worker.doWork(AbstractThreadPool.java:564)
at org.glassfish.grizzly.threadpool.AbstractThreadPool$Worker.run(AbstractThreadPool.java:544)
at java.lang.Thread.run(Unknown Source)

任何帮助将不胜感激。

Answer 1

您应该在执行回滚之前检查事务状态，因为它会触发您的异常。
您可以使用TransactionManager 接口中的public int getStatus() throws SystemException; 方法。
并且您可以将返回值与关联到javax.transaction.Status 接口的int 值进行比较：

public final static int STATUS_ACTIVE= 0;

如果事务处于活动状态，则执行回滚。否则，您不执行它。
你可以做到的：

catch (Exception e){
        e.printStackTrace();
         // logger.error(e);  It is a better solution than logging in output.
        if (utx.getTransaction().getStatus()==Status.STATUS_ACTIVE){
           utx.rollback();
        }
    }