org apache catalina LifecycleException Failed to start component StandardServer 8005 A child container failed during start

Question

I am struggling for the past 6-7 hrs trying to figure out what went wrong with my Apache Tomcat Server  In all of my projects  the jdk version got switched to 1 6 from 1 8    To solve the version conflict  I verified whether compiled version and JVM of Tomcat version are same by taking help from here   For multiple contexts with the same path error  I know i need to remove duplicate Context tags in server xml  So  first I check in Servers project  which gets created itself when you add Apache Tomcat Server in Eclipse  and find none there  So  I delve deep into the directory Eclipse WorkSpace  metadata  plugins org eclipse wst server core tmp3 conf and removed the duplicate Context tags over there  with help taken from here   Now when i create a new Dynamic Web Project  everything works fine and I am able to see the web page  But if I try to access any of the HTML  XHTML files of those old project in which the jdk got changed  this org apache catalina LifecycleException continues to pop up and the server fails to start  and consequently these duplicate Context tags continues to build up again and again every time i start the server   None of my old Web application projects seems to work now       java util concurrent ExecutionException        org apache catalina LifecycleException  Failed to start component         StandardEngine Catalina  StandardHost localhost  StandardContext         EdBurns ChrisSchalk              SEVERE  A child container failed during start       java util concurrent ExecutionException         org apache catalina LifecycleException  Failed to start component         StandardEngine Catalina  StandardHost localhost                    Caused by  java lang RuntimeException  Unexpected element value kind in        annotation  0   How to prevent these context tags being build up again and again in server xml  Secondly  how to get back those old web projects to working state again

User · Answer

Went through the various resources on the net but none of them helped then i deleted the existing server and added the same server again and now it is working fine and the steps are

Window>>ShowView>>Servers>>RightClick>>Delete

and then add the server again as you have added previously.

User · Answer

I had a similar error and fixed it by following steps  1  Under Servers project  which gets created itself when you add Apache Tomcat Server in Eclipse   open server xml 2  Comment out the line   lt Context docBase       gt

User · Answer

If you are using the following stack  Server Version  Apache Tomcat 9 0 21 Servlet Version  4 0 JSP Version  2 3   Then try adding  lt absolute-ordering   gt  to your web xml file  So your file looks like this    lt  xml version  1 0  encoding  UTF-8   gt   lt web-app xmlns xsi  http   www w3 org 2001 XMLSchema-instance  xmlns  http   xmlns jcp org xml ns javaee  xsi schemaLocation  http   xmlns jcp org xml ns javaee http   xmlns jcp org xml ns javaee web-app 3 1 xsd  id  WebApp ID  version  3 1  gt     lt display-name gt spring-mvc-crud-demo lt  display-name gt      lt absolute-ordering   gt      lt welcome-file-list gt       lt welcome-file gt index jsp lt  welcome-file gt       lt welcome-file gt index html lt  welcome-file gt     lt  welcome-file-list gt

User · Answer

If you are not using annotation based Servlet then please remove annotation  WebServlet   YourServletName    from the starting of the servlet  This annotation confuses the mapping with web xml  after removing this annotation Tomcat server will work properly

User · Answer

Go to the task manager  kill the java processes and turn the server back on  should work fine

User · Answer

One of the problems that can cause this is when you forget to put the   character in the WebServlet annotation  WebServlet   example    WebServlet  example   I hope it works  it worked for me

User · Answer

I think it is jar file version problem  I had the same issue and I fixed it by changing the commons-codec-1 6 jar file from the build path  Earlier I was using latest version 1 10  Gradually I decreased the versions and 1 6 version fixed my issue

User · Answer

Below solution worked for me  Navigate to Project- Clean   Clean all the projects referenced by Tomcat server Refresh the project you re trying to run on Tomcat  Try to run the server afterwards

User · Answer

In my case  the servlet-api jar file in jre lib ext in the jdk directory conflicts with the servlet-api jar file in tomcat  removing the servlet-api jar in jre lib ext in the jdk directory can solve the problem

User · Answer

This seems to be an issue with local Maven repository   i e   m2 folder  may be due to some corrupt  jar file  For me  the following actions helped to overcome this issue    On my local file system  I ve deleted the directory  m2  Maven local repository    In Eclipse  updated the project  select Maven   Update Project  Ran the app again on Tomcat server

User · Answer

This will prevent multiple context tags to be created upon each request  1  Stop the server 2  Clean Tomcat s work directory

User · Answer

Just make sure build with correct  web xml configuration I have update web xml with tomcat configuration and it worked for me  Sample  -   x000D   x000D   lt  xml version  1 0  encoding  UTF-8   gt  x000D   lt web-app xmlns xsi  http   www w3 org 2001 XMLSchema-instance  x000D   xmlns  http   java sun com xml ns javaee  xmlns web  http   java sun com xml ns javaee web-app 2 5 xsd  x000D   xsi schemaLocation  http   java sun com xml ns javaee http   java sun com xml ns javaee web-app 2 5 xsd  x000D   id  WebApp ID  version  2 5  gt  x000D    lt display-name gt simulator lt  display-name gt  x000D    lt description gt simulator app lt  description gt  x000D   x000D   x000D       lt  -- File upload  -- gt  x000D       lt welcome-file-list gt  x000D           lt welcome-file gt index html lt  welcome-file gt  x000D       lt  welcome-file-list gt  x000D    lt  -- excel simulation -- gt  x000D       lt display-name gt simulator lt  display-name gt  x000D       lt description gt simulator app lt  description gt  x000D       lt  -- File upload  -- gt  x000D       lt welcome-file-list gt  x000D           lt welcome-file gt InsertPage html lt  welcome-file gt  x000D       lt  welcome-file-list gt  x000D       lt servlet gt  x000D           lt servlet-name gt FileUploadServlet lt  servlet-name gt  x000D           lt servlet-class gt clari5 excel FileUploadServlet lt  servlet-class gt  x000D           lt load-on-startup gt 1 lt  load-on-startup gt  x000D       lt  servlet gt  x000D       lt servlet-mapping gt  x000D           lt servlet-name gt FileUploadServlet lt  servlet-name gt  x000D           lt url-pattern gt  excelSimulator FileUploadServlet lt  url-pattern gt  x000D       lt  servlet-mapping gt  x000D   x000D   x000D   x000D   lt  web-app gt  x000D   x000D   x000D

[java] org.apache.catalina.LifecycleException: Failed to start component [StandardServer[8005]]A child container failed during start

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