java - tomcat没有正常启动

Question

***Exception occured where running application***
  java.util.concurrent.ExecutionException: org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Catalina].StandardHost[localhost].StandardContext[/CRUD]]
        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.StandardHost.startInternal(StandardHost.java:819)
        at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:147)
        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: Failed to start component [StandardEngine[Catalina].StandardHost[localhost].StandardContext[/CRUD]]
        at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:153)
        ... 6 more
    Caused by: java.lang.NoClassDefFoundError: Lorg/apache/commons/logging/Log;
        at java.lang.Class.getDeclaredFields0(Native Method)
        at java.lang.Class.privateGetDeclaredFields(Unknown Source)
        at java.lang.Class.getDeclaredFields(Unknown Source)
        at org.apache.catalina.util.Introspection.getDeclaredFields(Introspection.java:106)
        at org.apache.catalina.startup.WebAnnotationSet.loadFieldsAnnotation(WebAnnotationSet.java:270)
        at org.apache.catalina.startup.WebAnnotationSet.loadApplicationServletAnnotations(WebAnnotationSet.java:139)
        at org.apache.catalina.startup.WebAnnotationSet.loadApplicationAnnotations(WebAnnotationSet.java:65)
        at org.apache.catalina.startup.ContextConfig.applicationAnnotationsConfig(ContextConfig.java:415)
        at org.apache.catalina.startup.ContextConfig.configureStart(ContextConfig.java:892)
        at org.apache.catalina.startup.ContextConfig.lifecycleEvent(ContextConfig.java:386)
        at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:117)
        at org.apache.catalina.util.LifecycleBase.fireLifecycleEvent(LifecycleBase.java:90)
        at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5472)
        at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:147)
        ... 6 more
    Caused by: java.lang.ClassNotFoundException: org.apache.commons.logging.Log
        at org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1858)
        at org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1701)
        ... 20 more

    May 06, 2016 4:15:41 PM org.apache.catalina.core.ContainerBase startInternal
    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

    May 06, 2016 4:15:41 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: 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

Answer 1

错误信息很清楚:

 Caused by: java.lang.ClassNotFoundException: org.apache.commons.logging.Log

您在类路径中错过了 Apache commons-logging.jar。