suis apprendre à faire des services Web reposant tout en implémentant je me suis erreur suivant me aider à résoudre

Question

Capture d'écran du code source et d'exception:

SEVERE: A child container failed during start 
java.util.concurrent.ExecutionException: org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Catalina].StandardHost[localhost]] 
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:1120) 
at org.apache.catalina.core.StandardEngine.startInternal(StandardEngine.java:300) 
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:147) 
at org.apache.catalina.core.StandardService.startInternal(StandardService.java:444) 
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:147) 
at org.apache.catalina.core.StandardServer.startInternal(StandardServer.java:738) 
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:147) 
at org.apache.catalina.startup.Catalina.start(Catalina.java:693) 
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:294) 
at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:428) 
Caused by: org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Catalina].StandardHost[localhost]] 
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:153) 
at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1572) 
at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1562) 
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: A child container failed during start 
at org.apache.catalina.core.ContainerBase.startInternal(ContainerBase.java:1128) 
at org.apache.catalina.core.StandardHost.startInternal(StandardHost.java:819) 
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:147) 
... 6 more 

Mar 30, 2016 10:38:42 AM org.apache.catalina.startup.Catalina start 
SEVERE: The required Server component failed to start so Tomcat is unable to start. 
org.apache.catalina.LifecycleException: Failed to start component [StandardServer[8005]] 
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:153) 
at org.apache.catalina.startup.Catalina.start(Catalina.java:693) 
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:294) 
at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:428) 
Caused by: org.apache.catalina.LifecycleException: Failed to start component [StandardService[Catalina]] 
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:153) 
at org.apache.catalina.core.StandardServer.startInternal(StandardServer.java:738) 
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:147) 
... 7 more 
Caused by: org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Catalina]] 
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:153) 
at org.apache.catalina.core.StandardService.startInternal(StandardService.java:444) 
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:147) 
... 9 more 
Caused by: org.apache.catalina.LifecycleException: A child container failed during start 
at org.apache.catalina.core.ContainerBase.startInternal(ContainerBase.java:1128) 
at org.apache.catalina.core.StandardEngine.startInternal(StandardEngine.java:300) 
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:147) 
... 11 more 

Capture d'écran du fichier de configuration web.xml:

Answer 1

Cette exception est visible lorsque la version JRE d'Eclipse et de Tomcat n'est pas compatible. Solution - Vous pouvez remplacer Eclipse 1 par Tomcat ou vice-versa. Vous pouvez rechercher JAVA_HOME en consultant le fichier tomcat startup.bat.