Hi, 2017-03-23 22:47 GMT+02:00 Thomas DELHOMENIE <thomas.delhome...@gmail.com>: > > Hi, > > With Tomcat 8.5.12 I hit a NPE when I use RequestDispatcher to redirect > from a servlet to another one in the case of the mapping of this second > servlet ends with /*. An error 500 is returned because of a > NullPointerException :
Most probably you are facing this issue [1]. The fix will be available in 8.5.13. Regards, Violeta [1] https://bz.apache.org/bugzilla/show_bug.cgi?id=60882 > java.lang.NullPointerException > at > org.apache.catalina.core.ApplicationMapping.getServletMapping(ApplicationMapping.java:62) > at > org.apache.catalina.core.ApplicationContext.getRequestDispatcher(ApplicationContext.java:486) > at > org.apache.catalina.core.ApplicationContextFacade.getRequestDispatcher(ApplicationContextFacade.java:222) > at org.exoplatform.RedirectServlet.doGet(RedirectServlet.java:19) > at javax.servlet.http.HttpServlet.service(HttpServlet.java:635) > at javax.servlet.http.HttpServlet.service(HttpServlet.java:742) > at > org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:230) > at > org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:165) > at > org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52) > at > org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:192) > at > org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:165) > at > org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:198) > at > org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96) > at > org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:140) > at > org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:80) > at > org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:624) > at > org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:87) > at > org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:341) > at > org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:783) > at > org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66) > at > org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:798) > at > org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1441) > at > org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49) > at > java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1161) > at > java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635) > at > org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) > at java.base/java.lang.Thread.run(Thread.java:844) > > To reproduce this issue I created a simple war with the following web.xml : > > <web-app 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/web-app_3_1.xsd"; > version="3.1" > metadata-complete="true"> > > <description> > Servlet and JSP Examples. > </description> > <display-name>Servlet and JSP Examples</display-name> > > <servlet> > <servlet-name>HelloWorldExample</servlet-name> > <servlet-class>org.sample.HelloWorldServlet</servlet-class> > </servlet> > <servlet> > <servlet-name>RedirectServlet</servlet-name> > <servlet-class>org.sample.RedirectServlet</servlet-class> > </servlet> > > <servlet-mapping> > <servlet-name>HelloWorldExample</servlet-name> > <url-pattern>/HelloWorldExample/*</url-pattern> > </servlet-mapping> > <servlet-mapping> > <servlet-name>RedirectServlet</servlet-name> > <url-pattern>/RedirectServlet</url-pattern> > </servlet-mapping> > </web-app> > > The class RedirectServlet is : > > package org.sample; > > import javax.servlet.RequestDispatcher; > import javax.servlet.ServletException; > import javax.servlet.http.HttpServlet; > import javax.servlet.http.HttpServletRequest; > import javax.servlet.http.HttpServletResponse; > import java.io.IOException; > > public class RedirectServlet extends HttpServlet { > @Override > public void doGet(HttpServletRequest request, > HttpServletResponse response) > throws IOException, ServletException > { > RequestDispatcher requestDispatcher = > request.getServletContext().getRequestDispatcher("/HelloWorldExample"); > requestDispatcher.forward(request, response); > } > } > > And the class HelloWorldServlet is : > > package org.sample; > > import javax.servlet.ServletException; > import javax.servlet.http.HttpServlet; > import javax.servlet.http.HttpServletRequest; > import javax.servlet.http.HttpServletResponse; > import java.io.IOException; > import java.io.PrintWriter; > > public class HelloWorldServlet extends HttpServlet { > @Override > public void doGet(HttpServletRequest request, > HttpServletResponse response) > throws IOException, ServletException > { > PrintWriter out = response.getWriter(); > > out.println("<!DOCTYPE html><html>"); > out.println("<head>"); > out.println("<meta charset=\"UTF-8\" />"); > out.println("<title>Hello World</title>"); > out.println("</head>"); > out.println("<body bgcolor=\"white\">"); > out.println("<a href=\"../helloworld.html\">"); > out.println("<img src=\"../images/code.gif\" height=24 " + > "width=24 align=right border=0 alt=\"view code\"></a>"); > out.println("<a href=\"../index.html\">"); > out.println("<img src=\"../images/return.gif\" height=24 " + > "width=24 align=right border=0 alt=\"return\"></a>"); > out.println("<h1>Hello World !</h1>"); > out.println("</body>"); > out.println("</html>"); > } > } > > I do not have this issue with Tomcat 8.5.11. > I also do not have this issue if I change the mapping of the servlet > HelloWorldExample to "/HelloWorldExample" instead of "/HelloWorldExample/*". > > It looks like a bug but I wanted to be sure of that before opening an issue > in the bugtracker. Should I open one ? > > Thanks
