Jsp Glassfish 4.1错误：session.invalidate空指针异常

我将Netbeans从7.3更新到8.01，将Glassfish从4.0更新到4.1。现在我的项目中出现了这个异常。为什么？会话不是空的，但我有一个nullpointerexception。 我哪里做错了？ 谢谢

错误代码：

Session event listener threw exception
java.lang.NullPointerException
at org.jboss.weld.servlet.WeldTerminalListener.getSessionContext(WeldTerminalListener.java:65)
at org.jboss.weld.servlet.WeldTerminalListener.sessionDestroyed(WeldTerminalListener.java:57)
at org.apache.catalina.session.StandardSession.expire(StandardSession.java:910)
at org.apache.catalina.session.StandardSession.expire(StandardSession.java:854)
at org.apache.catalina.session.StandardSession.expire(StandardSession.java:842)
at org.apache.catalina.session.StandardSession.invalidate(StandardSession.java:1603)
at  org.apache.catalina.session.StandardSessionFacade.invalidate(StandardSessionFacade.java:204)
at store.web.LogoutServlet.doGet(LogoutServlet.java:20)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:687)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:790)
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:415)
at 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)
at org.glassfish.grizzly.http.server.HttpHandler.runService(HttpHandler.java:201)
at org.glassfish.grizzly.http.server.HttpHandler.doHandle(HttpHandler.java:175)
at org.glassfish.grizzly.http.server.HttpServerFilter.handleRead(HttpServerFilter.java:235)
at org.glassfish.grizzly.filterchain.ExecutorResolver$9.execute(ExecutorResolver.java:119)
at org.glassfish.grizzly.filterchain.DefaultFilterChain.executeFilter(DefaultFilterChain.java:284)
at org.glassfish.grizzly.filterchain.DefaultFilterChain.executeChainPart(DefaultFilterChain.java:201)
at org.glassfish.grizzly.filterchain.DefaultFilterChain.execute(DefaultFilterChain.java:133)
at org.glassfish.grizzly.filterchain.DefaultFilterChain.process(DefaultFilterChain.java:112)
at org.glassfish.grizzly.ProcessorExecutor.execute(ProcessorExecutor.java:77)
at org.glassfish.grizzly.nio.transport.TCPNIOTransport.fireIOEvent(TCPNIOTransport.java:561)
at org.glassfish.grizzly.strategies.AbstractIOStrategy.fireIOEvent(AbstractIOStrategy.java:112)
at org.glassfish.grizzly.strategies.WorkerThreadIOStrategy.run0(WorkerThreadIOStrategy.java:117)
at org.glassfish.grizzly.strategies.WorkerThreadIOStrategy.access$100(WorkerThreadIOStrategy.java:56)
at org.glassfish.grizzly.strategies.WorkerThreadIOStrategy$WorkerThreadRunnable.run(WorkerThreadIOStrategy.java:137)
at org.glassfish.grizzly.threadpool.AbstractThreadPool$Worker.doWork(AbstractThreadPool.java:565)
at org.glassfish.grizzly.threadpool.AbstractThreadPool$Worker.run(AbstractThreadPool.java:545)
at java.lang.Thread.run(Thread.java:724)

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即使您没有在应用程序中利用bean注入，但在“src/main/webapp/WEB-INF/”下创建一个beans.xml文件（无需在文件中声明任何bean）并包含以下内容，这为我解决了一次问题：

---

Netbeans 8.1和Glassfish开源版4.1（build 13）上也存在同样的问题。您必须通过在

/WEB-INF

文件夹中创建或修改

beans.xml

文件来禁用CDI：

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://xmlns.jcp.org/xml/ns/javaee"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee 
       http://xmlns.jcp.org/xml/ns/javaee/beans_1_1.xsd"
       bean-discovery-mode="none">
</beans>

bean发现模式

设置为

none

---

更多信息。

这是一只玻璃鱼的虫子。另外，在第19行，

会话

将永远不会为空。如果希望使用null而不是新会话，请使用

request.getSession（false）

。从JavaEE Api:getSession（）返回与此请求关联的当前会话，或者如果请求没有会话，则创建一个会话.第19行是多余的。因此这是Glassfish 4.1文件beans.xml中的一个bug。Netbeans为我创建了它。无论如何，谢谢。

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://xmlns.jcp.org/xml/ns/javaee"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee 
       http://xmlns.jcp.org/xml/ns/javaee/beans_1_1.xsd"
       bean-discovery-mode="none">
</beans>