'java.util.concurrent.ExecutionException: org.apache.catalina.LifecycleException: Failed to start

When I am trying to run my project it shows this type of error.

java.util.concurrent.ExecutionException: org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Catalina].StandardHost[localhost].StandardContext[/Temp]]
  at java.util.concurrent.FutureTask.report(Unknown Source)
  at java.util.concurrent.FutureTask.get(Unknown Source)
  at org.apache.catalina.core.ContainerBase.startInternal(ContainerBase.java:939)
  at org.apache.catalina.core.StandardHost.startInternal(StandardHost.java:872)
  at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183)
  at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1419)
  at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1409)
  at java.util.concurrent.FutureTask.run(Unknown Source)
  at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)  
  at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) 
  at java.lang.Thread.run(Unknown Source) 
Caused by: org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Catalina].StandardHost[localhost].StandardContext[/Temp]]
  at org.apache.catalina.util.LifecycleBase.handleSubClassException(LifecycleBase.java:441)
  at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:198)
  ... 6 more 
Caused by: java.lang.IllegalArgumentException: The servlets named [MyServlet] and [temp.MyServlet] are both mapped to the url-pattern [/MyServlet] which is not permitted
  at org.apache.tomcat.util.descriptor.web.WebXml.addServletMappingDecoded(WebXml.java:327)
  at org.apache.tomcat.util.descriptor.web.WebXml.addServletMapping(WebXml.java:320)
  at org.apache.catalina.startup.ContextConfig.processAnnotationWebServlet(ContextConfig.java:2389)
  at org.apache.catalina.startup.ContextConfig.processAnnotationsStream(ContextConfig.java:2066)
  at org.apache.catalina.startup.ContextConfig.processAnnotationsWebResource(ContextConfig.java:1952)
  at org.apache.catalina.startup.ContextConfig.processAnnotationsWebResource(ContextConfig.java:1946)
  at org.apache.catalina.startup.ContextConfig.webConfig(ContextConfig.java:1153)
  at org.apache.catalina.startup.ContextConfig.configureStart(ContextConfig.java:775)
  at org.apache.catalina.startup.ContextConfig.lifecycleEvent(ContextConfig.java:299)
  at org.apache.catalina.util.LifecycleBase.fireLifecycleEvent(LifecycleBase.java:123)
  at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5077)
  at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183)
  ... 6 more

Dec 12, 2016 12:53:47 PM org.apache.catalina.core.ContainerBase startInternal SEVERE: A child container failed during start java.util.concurrent.ExecutionException: org.apache.catalina.LifecycleException: A child container failed during start  at java.util.concurrent.FutureTask.report(Unknown Source) 
  at java.util.concurrent.FutureTask.get(Unknown Source)
  at org.apache.catalina.core.ContainerBase.startInternal(ContainerBase.java:939)
  at org.apache.catalina.core.StandardEngine.startInternal(StandardEngine.java:262)
  at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183)
  at org.apache.catalina.core.StandardService.startInternal(StandardService.java:422)
  at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183)
  at org.apache.catalina.core.StandardServer.startInternal(StandardServer.java:793)
  at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183)
  at org.apache.catalina.startup.Catalina.start(Catalina.java:655) 
  at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
  at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
  at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
  at java.lang.reflect.Method.invoke(Unknown Source)
  at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:355)
  at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:495) Caused by: org.apache.catalina.LifecycleException: A child container failed during start
  at org.apache.catalina.core.ContainerBase.startInternal(ContainerBase.java:948)
  at org.apache.catalina.core.StandardHost.startInternal(StandardHost.java:872)
  at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183)
  at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1419)
  at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1409)
  at java.util.concurrent.FutureTask.run(Unknown Source)
  at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)  
  at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) 
  at java.lang.Thread.run(Unknown Source)

Dec 12, 2016 12:53:47 PM org.apache.catalina.startup.Catalina start SEVERE: The required Server component failed to start so Tomcat is unable to start. org.apache.catalina.LifecycleException: A child container failed during start  
  at org.apache.catalina.core.ContainerBase.startInternal(ContainerBase.java:948)
  at org.apache.catalina.core.StandardEngine.startInternal(StandardEngine.java:262)
  at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183)
  at org.apache.catalina.core.StandardService.startInternal(StandardService.java:422)
  at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183)
  at org.apache.catalina.core.StandardServer.startInternal(StandardServer.java:793)
  at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183)
  at org.apache.catalina.startup.Catalina.start(Catalina.java:655) 
  at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
  at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
  at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
  at java.lang.reflect.Method.invoke(Unknown Source)
  at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:355)
  at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:495)

IDE: Ecilpse-neon
server:Tomcat v9.0
Java: 1.8.0 ( in Tomcat also)
Added jar:
- catalina-4.1.31
- catalina-ant-6.0.37
- catalina-ha-6.0.13
- catalina-tribes
- javax.servlet-3.0
- servlet-api-2.5-6.1h.6

MyServlet.java

//@WebServlet("/MyServlet")
public class MyServlet extends HttpServlet {
    private static final long serialVersionUID = 1L;

    /**
     * Default constructor. 
     */
    public MyServlet() {
        // TODO Auto-generated constructor stub
    }

    /**
     * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
     */
    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        // TODO Auto-generated method stub
        PrintWriter out = response.getWriter();
        out.print("Hello..............");
        response.getWriter().append("Served at: ").append(request.getContextPath());
    }

    /**
     * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
     */
    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        // TODO Auto-generated method stub
        doGet(request, response);
    }

web.xml:

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd" id="WebApp_ID" version="3.0">
  <display-name>Temp</display-name>
  <welcome-file-list>
    <welcome-file>index.html</welcome-file>
    <welcome-file>index.htm</welcome-file>
    <welcome-file>index.jsp</welcome-file>
    <welcome-file>default.html</welcome-file>
    <welcome-file>default.htm</welcome-file>
    <welcome-file>default.jsp</welcome-file>
  </welcome-file-list>

  <servlet>
  <servlet-name>MyServlet</servlet-name>
  <servlet-class>temp.MyServlet</servlet-class>

  </servlet>
  <servlet-mapping>
  <servlet-name>MyServlet</servlet-name>
  <url-pattern>/MyServlet</url-pattern>
  </servlet-mapping>
</web-app>

}

How Can I solve those error?

Solution 1:^[1]

In my scenario, I am using @WebServlet Annotation and same url pattern mapping for two different servlet, after changing the url pattern in one of the servlet, Tomcat successfully started for me :-)

Solution 2:^[2]

I have followed java.lang.IllegalArgumentException: The servlets named [X] and [Y] are both mapped to the url-pattern [/url] which is not permitted this and it works!!!!!!!!

It seems that you have mixed @WebServlet annotation based and web.xml based configuration.

I doubt that you created a Servlet using the "Create Servlet" wizard which creates web.xml entry with url-pattern and then , added a @WebServlet annotation which duplicates anything you may put in the web.xml.

You should use the one or the other, not both. Remove the mapping from web.xml and go ahead with using only the @WebServlet annotation.

Solution 3:^[3]

Step 1) Delete the server.

Step 2) Click on window and then select preferences.

Step 3) Select server & then select Runtime Environments.

Step 4) Select & remove the runtime environment. Example : Apache Tomcat v9.0

Step 5) Again select & add runtime environment. Example : Apache Tomcat v9.0

Step 6) Select Tomcat Installation directory : which is parent directory of bin folder.

Step 7) Click finish and then click apply & close button to add runtime environment successfully.

Step 8) Click on window & then show view and select server.

Step 9) Click the link to create a new server, select the server and click finish.

Step 10) Right click and start the server.

Step 11) If any problem then change the ports, right click & open.

Step 12) Change the Tomcat admin port to 8080 or any four digit number, & similarly change port for HTTP/1.1 to 8000 or any four digit number.

Step 13) Save the port changes.

Step 14) Run the server, the problem is solved.

Solution 4:^[4]

It has worked after when I have removed @WebServlet annotation from my Myservlet.java.But I can't understand why it didn't work with @WebServlet

Sources

This article follows the attribution requirements of Stack Overflow and is licensed under CC BY-SA 3.0.

Source: Stack Overflow

Solution	Source
Solution 1	Hardik Patel
Solution 2	Community
Solution 3	Ankit
Solution 4	demo demo

'java.util.concurrent.ExecutionException: org.apache.catalina.LifecycleException: Failed to start

Solution 1:[1]

Solution 2:[2]

Solution 3:[3]

Solution 4:[4]

Sources

Related Questions

Solution 1:^[1]

Solution 2:^[2]

Solution 3:^[3]

Solution 4:^[4]