Re: Tomcat 8.5.12 - NPE when using RequestDispatcher

[Thomas DELHOMENIE]

2017-03-23 21:50 GMT+01:00 Violeta Georgieva :

> Hi,
>
> 2017-03-23 22:47 GMT+02:00 Thomas DELHOMENIE  >:
> >
> > 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


Yes, very probably :)
Thanks!


>
>
> >  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
> :
> >
> > 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">
> >
> > 
> >   Servlet and JSP Examples.
> > 
> > Servlet and JSP Examples
> >
> > 
> >   HelloWorldExample
> >   org.sample.HelloWorldServlet
> > 
> > 
> > RedirectServlet
> > org.sample.RedirectServlet
> > 
> >
> > 
> > HelloWorldExample
> > /HelloWorldExample/*
> > 
> > 
> > RedirectServlet
> > /RedirectServlet
> > 
> > 
> >
> > 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");
> >

Re: Tomcat 8.5.12 - NPE when using RequestDispatcher

[Violeta Georgieva]

Hi,

2017-03-23 22:47 GMT+02:00 Thomas DELHOMENIE :
>
> 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
:
>
> 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">
>
> 
>   Servlet and JSP Examples.
> 
> Servlet and JSP Examples
>
> 
>   HelloWorldExample
>   org.sample.HelloWorldServlet
> 
> 
> RedirectServlet
> org.sample.RedirectServlet
> 
>
> 
> HelloWorldExample
> /HelloWorldExample/*
> 
> 
> RedirectServlet
> /RedirectServlet
> 
> 
>
> 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 

Tomcat 8.5.12 - NPE when using RequestDispatcher

[Thomas DELHOMENIE]

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 :

 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 :

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">


  Servlet and JSP Examples.

Servlet and JSP Examples


  HelloWorldExample
  org.sample.HelloWorldServlet


RedirectServlet
org.sample.RedirectServlet



HelloWorldExample
/HelloWorldExample/*


RedirectServlet
/RedirectServlet



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("");
out.println("");
out.println("");
out.println("Hello World");
out.println("");
out.println("");
out.println("");
out.println("");
out.println("");
out.println("");
out.println("Hello World !");
out.println("");
out.println("");
  }
}

I do not have