I get this Tomcat Error:

    Sep 09, 2012 4:16:54 PM org.apache.catalina.core.AprLifecycleListener init
    Information: The APR based Apache Tomcat Native library which allows optimal performance in production environments was not found on the java.library.path: C:\Products\jdk1.7.0_03\bin;C:\Windows\Sun\Java\bin;C:\Windows\system32;C:\Windows;C:/Products/jdk1.7.0_03/jre/bin/client;C:/Products/jdk1.7.0_03/jre/bin;C:/Products/jdk1.7.0_03/jre/lib/i386;C:\Windows\system32;C:\Windows;C:\Windows\System32\Wbem;C:\Windows\System32\WindowsPowerShell\v1.0\;C:\Products\jdk1.7.0_03\jre\bin;c:\Program Files (x86)\Microsoft SQL Server\100\Tools\Binn\;c:\Program Files\Microsoft SQL Server\100\Tools\Binn\;c:\Program Files\Microsoft SQL Server\100\DTS\Binn\;c:\Program Files (x86)\Microsoft SQL Server\100\Tools\Binn\VSShell\Common7\IDE\;c:\Program Files (x86)\Microsoft SQL Server\100\DTS\Binn\;C:\Products\eclipse32;;.
    Sep 09, 2012 4:16:54 PM org.apache.tomcat.util.digester.SetPropertiesRule begin
    Warnung: [SetPropertiesRule]{Server/Service/Engine/Host/Context} Setting property &#39;source&#39; to &#39;org.eclipse.jst.jee.server:NAR_JDBC_DBO&#39; did not find a matching property.
    Sep 09, 2012 4:16:55 PM org.apache.coyote.AbstractProtocol init
    Information: Initializing ProtocolHandler [&quot;http-bio-80&quot;]
    Sep 09, 2012 4:16:55 PM org.apache.coyote.AbstractProtocol init
    Information: Initializing ProtocolHandler [&quot;ajp-bio-8009&quot;]
    Sep 09, 2012 4:16:55 PM org.apache.catalina.startup.Catalina load
    Information: Initialization processed in 1008 ms
    Sep 09, 2012 4:16:55 PM org.apache.catalina.core.StandardService startInternal
    Information: Starting service Catalina
    Sep 09, 2012 4:16:55 PM org.apache.catalina.core.StandardEngine startInternal
    Information: Starting Servlet Engine: Apache Tomcat/7.0.27
    Sep 09, 2012 4:16:55 PM org.apache.catalina.core.ContainerBase startInternal
    Schwerwiegend: A child container failed during start
    java.util.concurrent.ExecutionException: org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Catalina].StandardHost[localhost].StandardContext[/NAR_JDBC_DBO]]
    	at java.util.concurrent.FutureTask$Sync.innerGet(FutureTask.java:252)
    	at java.util.concurrent.FutureTask.get(FutureTask.java:111)
    	at org.apache.catalina.core.ContainerBase.startInternal(ContainerBase.java:1128)
    	at org.apache.catalina.core.StandardHost.startInternal(StandardHost.java:782)
    	at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
    	at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1566)
    	at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1556)
    	at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:334)
    	at java.util.concurrent.FutureTask.run(FutureTask.java:166)
    	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110)
    	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603)
    	at java.lang.Thread.run(Thread.java:722)
    Caused by: org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Catalina].StandardHost[localhost].StandardContext[/NAR_JDBC_DBO]]
    	at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:154)
    	... 7 more
    Caused by: java.lang.NoClassDefFoundError: org/apache/commons/digester/RuleSet
    	at java.lang.Class.getDeclaredFields0(Native Method)
    	at java.lang.Class.privateGetDeclaredFields(Class.java:2308)
    	at java.lang.Class.getDeclaredFields(Class.java:1760)
    	at org.apache.catalina.startup.WebAnnotationSet.getDeclaredFields(WebAnnotationSet.java:452)
    	at org.apache.catalina.startup.WebAnnotationSet.loadFieldsAnnotation(WebAnnotationSet.java:257)
    	at org.apache.catalina.startup.WebAnnotationSet.loadApplicationServletAnnotations(WebAnnotationSet.java:136)
    	at org.apache.catalina.startup.WebAnnotationSet.loadApplicationAnnotations(WebAnnotationSet.java:66)
    	at org.apache.catalina.startup.ContextConfig.applicationAnnotationsConfig(ContextConfig.java:381)
    	at org.apache.catalina.startup.ContextConfig.configureStart(ContextConfig.java:858)
    	at org.apache.catalina.startup.ContextConfig.lifecycleEvent(ContextConfig.java:345)
    	at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:119)
    	at org.apache.catalina.util.LifecycleBase.fireLifecycleEvent(LifecycleBase.java:90)
    	at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5161)
    	at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
    	... 7 more
    Caused by: java.lang.ClassNotFoundException: org.apache.commons.digester.RuleSet
    	at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1711)
    	at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1556)
    	... 21 more
    
    Sep 09, 2012 4:16:55 PM org.apache.catalina.core.ContainerBase startInternal
    Schwerwiegend: 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$Sync.innerGet(FutureTask.java:252)
    	at java.util.concurrent.FutureTask.get(FutureTask.java:111)
    	at org.apache.catalina.core.ContainerBase.startInternal(ContainerBase.java:1128)
    	at org.apache.catalina.core.StandardEngine.startInternal(StandardEngine.java:302)
    	at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
    	at org.apache.catalina.core.StandardService.startInternal(StandardService.java:443)
    	at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
    	at org.apache.catalina.core.StandardServer.startInternal(StandardServer.java:732)
    	at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
    	at org.apache.catalina.startup.Catalina.start(Catalina.java:675)
    	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
    	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    	at java.lang.reflect.Method.invoke(Method.java:601)
    	at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:322)
    	at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:450)
    Caused by: org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Catalina].StandardHost[localhost]]
    	at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:154)
    	at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1566)
    	at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1556)
    	at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:334)
    	at java.util.concurrent.FutureTask.run(FutureTask.java:166)
    	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110)
    	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603)
    	at java.lang.Thread.run(Thread.java:722)
    Caused by: org.apache.catalina.LifecycleException: A child container failed during start
    	at org.apache.catalina.core.ContainerBase.startInternal(ContainerBase.java:1136)
    	at org.apache.catalina.core.StandardHost.startInternal(StandardHost.java:782)
    	at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
    	... 7 more
    
    Sep 09, 2012 4:16:55 PM org.apache.catalina.startup.Catalina start
    Schwerwiegend: Catalina.start: 
    org.apache.catalina.LifecycleException: Failed to start component [StandardServer[8005]]
    	at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:154)
    	at org.apache.catalina.startup.Catalina.start(Catalina.java:675)
    	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
    	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    	at java.lang.reflect.Method.invoke(Method.java:601)
    	at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:322)
    	at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:450)
    Caused by: org.apache.catalina.LifecycleException: Failed to start component [StandardService[Catalina]]
    	at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:154)
    	at org.apache.catalina.core.StandardServer.startInternal(StandardServer.java:732)
    	at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
    	... 7 more
    Caused by: org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Catalina]]
    	at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:154)
    	at org.apache.catalina.core.StandardService.startInternal(StandardService.java:443)
    	at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
    	... 9 more
    Caused by: org.apache.catalina.LifecycleException: A child container failed during start
    	at org.apache.catalina.core.ContainerBase.startInternal(ContainerBase.java:1136)
    	at org.apache.catalina.core.StandardEngine.startInternal(StandardEngine.java:302)
    	at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
    	... 11 more
    
    Sep 09, 2012 4:16:55 PM org.apache.catalina.startup.Catalina start
    Information: Server startup in 540 ms

What&#39;s the problem? I am using an Apache Tomcat 7 and the following 4 catalina jars are used:

 * catalina.jar
 * catalina-ant.jar
 * catalina-ha.jar
 * catalina-tribes.jar

Are any other JAR files missing?

Failed to start component [StandardEngine[Catalina].StandardHost[localhost].StandardContext[/JDBC_DBO]]

I have downloaded `apache-tomcat-7.0.35`. My JDK version is `jdk1.6.0_27`. 

How do I configure `CATALINA_HOME` as an environment variable and how do I run Tomcat server under Windows 7?

How to set CATALINA_HOME variable in windows 7?

Can anyone describe 


 - What is component in Tomcat and what is role of it in Tomcat server? 

 - What is Coyote? 

 - What is Catalina?


All Catalina Solutions on Gang of Coders

Total of 3 Catalina Solutions

Failed to start component [StandardEngine[Catalina].StandardHost[localhost].StandardContext[/JDBC_DBO]]

How to set CATALINA_HOME variable in windows 7?

What are the Tomcat Component? What is Catalina and Coyote?