jsp - Glassfish 4.1 错误 : session. 使空指针异常无效

Question

我将 Netbeans 从 7.3 更新到 8.01，将 Glassfish 从 4.0 更新到 4.1。现在我的项目中有这个异常。为什么？ session 不为空，但我有一个空指针异常。
我哪里做错了？
谢谢

12|public class LogoutServlet extends HttpServlet {
13|
14|@Override
15|protected void doGet(HttpServletRequest request,HttpServletResponse response)
16|        throws ServletException,IOException{
17|    
18|    HttpSession session=request.getSession();
19|    if(session!=null)
20|        session.invalidate();
21|    response.sendRedirect("index.jsp");
22| }//doGet
23|
24|}//LogoutServlet

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)

Answer 1

Netbeans 8.1 和 Glassfish Open Source Edition 4.1(build 13)上的相同问题。您必须通过创建或修改 beans.xml 来禁用 CDI。文件位于 ./WEB-INF文件夹:

<?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-discovery-mode设置为 none .

更多信息 here .