Question

当我们在使用GlassFish 4.1构建的J2EE应用程序中按下按钮时，JSF 2和JPA2在EJB层中调用@ApplicationScoped bean，堆栈跟踪显示为Caused by: java.lang.IllegalStateException: Unable to retrieve EntityManagerFactory for unitName null。其他调用看起来很好，它在这个特定的情况/按钮中发生了跟踪。
如果在post构造中执行对实体管理器的调用，则堆栈跟踪不会发生。

@PostConstruct
public void init() {
    entityManager.getCriteriaBuilder();
}

以下是完整的堆栈跟踪：

警告：＃{createWorkOrderBean.initFieldsFromComplementingDataSearchResult}：java.lang.IllegalStateException：无法检索unitName的EntityManagerFactory null javax.faces.FacesException：＃{createWorkOrderBean.initFieldsFromComplementingDataSearchResult}：java.lang.IllegalStateException：无法为unitName null检索EntityManagerFactory at com.sun.faces.application.ActionListenerImpl.processAction（ActionListenerImpl.java:118）在javax.faces.component.UICommand.broadcast（UICommand.java:315）在javax.faces.component.UIData.broadcast（UIData.java:1108）在javax.faces.component.UIViewRoot.broadcastEvents（UIViewRoot.java:790）在javax.faces.component.UIViewRoot.processApplication（UIViewRoot.java:1282） at com.sun.faces.lifecycle.InvokeApplicationPhase.execute（InvokeApplicationPhase.java:81）在com.sun.faces.lifecycle.Phase.doPhase（Phase.java:101）在com.sun.faces.lifecycle.LifecycleImpl.execute（LifecycleImpl.java:198）在javax.faces.webapp.FacesServlet.service（FacesServlet.java:646）在org.apache.catalina.core.StandardWrapper.service（StandardWrapper.java:1682）在org.apache.catalina.core.ApplicationFilterChain.internalDoFilter（ApplicationFilterChain.java:344）在org.apache.catalina.core.ApplicationFilterChain.doFilter（ApplicationFilterChain.java:214）在org.glassfish.tyrus.servlet.TyrusServletFilter.doFilter（TyrusServletFilter.java:295）在org.apache.catalina.core.ApplicationFilterChain.internalDoFilter（ApplicationFilterChain.java:256）在org.apache.catalina.core.ApplicationFilterChain.doFilter（ApplicationFilterChain.java:214）在org.apache.catalina.core.StandardWrapperValve.invoke（StandardWrapperValve.java:316） at org.apache.catalina.core.StandardContextValve.invoke（StandardContextValve.java:160）在org.apache.catalina.core.StandardPipeline.doInvoke（StandardPipeline.java:734）在org.apache.catalina.core.StandardPipeline.invoke（StandardPipeline.java:673）在com.sun.enterprise.web.WebPipeline.invoke（WebPipeline.java:99）在org.apache.catalina.core.StandardHostValve.invoke（StandardHostValve.java:174）在org.apache.catalina.connector.CoyoteAdapter.doService（CoyoteAdapter.java:415）在org.apache.catalina.connector.CoyoteAdapter.service（CoyoteAdapter.java:282） at com.sun.enterprise.v3.services.impl.ContainerMapper $ HttpHandlerCallable.call（ContainerMapper.java:459） at com.sun.enterprise.v3.services.impl.ContainerMapper.service（ContainerMapper.java:167）在org.glassfish.grizzly.http.server.HttpHandler.runService（HttpHandler.java:201）在org.glassfish.grizzly.http.server.HttpHandler.doHandle（HttpHandler.java:175）在org.glassfish.grizzly.http.server.HttpServerFilter.handleRead（HttpServerFilter.java:235）在org.glassfish.grizzly.filterchain.ExecutorResolver $ 9.execute（ExecutorResolver.java:119）在org.glassfish.grizzly.filterchain.DefaultFilterChain.executeFilter（DefaultFilterChain.java:284）在org.glassfish.grizzly.filterchain.DefaultFilterChain.executeChainPart（DefaultFilterChain.java:201）在org.glassfish.grizzly.filterchain.DefaultFilterChain.execute（DefaultFilterChain.java:133）在org.glassfish.grizzly.filterchain.DefaultFilterChain.process（DefaultFilterChain.java:112）在org.glassfish.grizzly.ProcessorExecutor.execute（ProcessorExecutor.java:77）在org.glassfish.grizzly.nio.transport.TCPNIOTransport.fireIOEvent（TCPNIOTransport.java:561）在org.glassfish.grizzly.strategies.AbstractIOStrategy.fireIOEvent（AbstractIOStrategy.java:112）在org.glassfish.grizzly.strategies.WorkerThreadIOStrategy.run0（WorkerThreadIOStrategy.java:117）在org.glassfish.grizzly.strategies.WorkerThreadIOStrategy.access $ 100（WorkerThreadIOStrategy.java:56）在org.glassfish.grizzly.strategies.WorkerThreadIOStrategy $ WorkerThreadRunnable.run（WorkerThreadIOStrategy.java:137）在org.glassfish.grizzly.threadpool.AbstractThreadPool $ Worker.doWork（AbstractThreadPool.java:565）在org.glassfish.grizzly.threadpool.AbstractThreadPool $ Worker.run（AbstractThreadPool.java:545）在java.lang.Thread.run（Thread.java:748）引发者：javax.faces.el.EvaluationException：java.lang.IllegalStateException：无法为unitName null检索EntityManagerFactory at javax.faces.component.MethodBindingMethodExpressionAdapter.invoke（MethodBindingMethodExpressionAdapter.java:101） at com.sun.faces.application.ActionListenerImpl.processAction（ActionListenerImpl.java:102） ......还有41个引起：java.lang.IllegalStateException：无法检索unitName null的EntityManagerFactory at com.sun.enterprise.container.common.impl.EntityManagerWrapper.init（EntityManagerWrapper.java:138）在com.sun.enterprise.container.common.impl.EntityManagerWrapper。 getDelegate（EntityManagerWrapper.java:171）在com.sun.enterprise.container.common.impl.EntityManagerWrapper.getCriteriaBuilder（EntityManagerWrapper.java:834） at se.evado.server.ao.customer.kalmarenergi.KalmarEnergiElnatServerBusinessLogic $ TrimbleNisComplementer.copyComplementingDataToWorkOrder（KalmarEnergiElnatServerBusinessLogic.java:310） at se.evado.server.ao.web.bean.SearchComplementingDataBean.initWorkOrderFields（SearchComplementingDataBean.java:153） at se.evado.server.ao.web.bean.SearchComplementingDataBean $ Proxy $ $$ _ WeldClientProxy.initWorkOrderFields（Unknown Source） at se.evado.server.ao.web.bean.CreateWorkOrderBean.initFieldsFromComplementingDataSearchResult（CreateWorkOrderBean.java:337） at sun.reflect.NativeMethodAccessorImpl.invoke0（Native Method） at sun.reflect.NativeMethodAccessorImpl.invoke（NativeMethodAccessorImpl.java:62） at sun.reflect.DelegatingMethodAccessorImpl.invoke（DelegatingMethodAccessorImpl.java:43） at java.lang.reflect.Method.invoke（Method.java:498）在com.sun.el.parser.AstValue.invoke（AstValue.java:289） at com.sun.el.MethodExpressionImpl.invoke（MethodExpressionImpl.java:304）在org.jboss.weld.util.el.ForwardingMethodExpression.invoke（ForwardingMethodExpression.java:40）在org.jboss.weld.el.WeldMethodExpression.invoke（WeldMethodExpression.java:50） at com.sun.faces.facelets.el.TagMethodExpression.invoke（TagMethodExpression.java:105）在javax.faces.component.MethodBindingMethodExpressionAdapter.invoke（MethodBindingMethodExpressionAdapter.java:87） ......还有42个

为什么会发生这种情况？如何摆脱它？

Answer 1

您必须为EntityManager命名。首先，您必须在META-INF中放置一个persistance.xml，并为您的持久单元指定一个名称。

<script>
    $("input[name='gender']").change(function(){
        $('html, body').animate({
            scrollTop: $("#profiel").offset().top
        }, 2000);
  });
</script>

之后你必须像这样注入EntityManager。

<?xml version="1.0" encoding="UTF-8"?>
<persistence
        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
        version="2.1"
        xmlns="http://xmlns.jcp.org/xml/ns/persistence"
        xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/persistence http://xmlns.jcp.org/xml/ns/persistence/persistence_2_1.xsd">
    <persistence-unit name="myUnit" transaction-type="JTA" />
</persistence>

这应该可以解决你的问题。

IllegalStateException无法检索unitName null

1 个答案: