tomcat无法启动异常

最近在eclipse中启动tomcat一直报错，原来是我写的servlet无法加载进来，删掉servlet文件后就可以正常启动了。看错误信息发现是缺少jar包的原因，由于tomcat找引用的jar包时，是先找Tomcat/lib下的jar包，再找application所在的WEB-INF/lib目录，所以应该将工程需要的jar包导入到工程的WEB-INF/lib下，然后刷新工程，jar包会自动导入到WebApp Libraries中。运行工程，问题解决
严重: A child container failed during start
java.util.concurrent.ExecutionException:org.apache.catalina.LifecycleException: Failed to start component[StandardEngine[Catalina].StandardHost[localhost].StandardContext[/solrcloud]]
    atjava.util.concurrent.FutureTask.report(FutureTask.java:122)
    atjava.util.concurrent.FutureTask.get(FutureTask.java:192)
    atorg.apache.catalina.core.ContainerBase.startInternal(ContainerBase.java:1123)
    atorg.apache.catalina.core.StandardHost.startInternal(StandardHost.java:816)
    atorg.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
    atorg.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1575)
    atorg.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1565)
    atjava.util.concurrent.FutureTask.run(FutureTask.java:266)
    atjava.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
    atjava.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
    atjava.lang.Thread.run(Thread.java:745)
Caused by: org.apache.catalina.LifecycleException: Failed to startcomponent[StandardEngine[Catalina].StandardHost[localhost].StandardContext[/solrcloud]]
    atorg.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:154)
    ... 6more
Caused by: java.lang.NoClassDefFoundError:org/apache/solr/client/solrj/SolrServerException
    atjava.lang.Class.getDeclaredFields0(Native Method)
    atjava.lang.Class.privateGetDeclaredFields(Class.java:2570)
    atjava.lang.Class.getDeclaredFields(Class.java:1903)
    atorg.apache.catalina.util.Introspection.getDeclaredFields(Introspection.java:106)
    atorg.apache.catalina.startup.WebAnnotationSet.loadFieldsAnnotation(WebAnnotationSet.java:270)
    atorg.apache.catalina.startup.WebAnnotationSet.loadApplicationServletAnnotations(WebAnnotationSet.java:139)
    atorg.apache.catalina.startup.WebAnnotationSet.loadApplicationAnnotations(WebAnnotationSet.java:65)
    atorg.apache.catalina.startup.ContextConfig.applicationAnnotationsConfig(ContextConfig.java:403)
    atorg.apache.catalina.startup.ContextConfig.configureStart(ContextConfig.java:879)
    atorg.apache.catalina.startup.ContextConfig.lifecycleEvent(ContextConfig.java:374)
    atorg.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:117)
    atorg.apache.catalina.util.LifecycleBase.fireLifecycleEvent(LifecycleBase.java:90)
    atorg.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5378)
    atorg.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
    ... 6more
Caused by: java.lang.ClassNotFoundException:org.apache.solr.client.solrj.SolrServerException
    atorg.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1720)
    atorg.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1571)
    ... 20more

八月 22, 2014 10:02:26 上午 org.apache.catalina.core.ContainerBasestartInternal
严重: A child container failed during start
java.util.concurrent.ExecutionException:org.apache.catalina.LifecycleException: Failed to start component[StandardEngine[Catalina].StandardHost[localhost]]
    atjava.util.concurrent.FutureTask.report(FutureTask.java:122)
    atjava.util.concurrent.FutureTask.get(FutureTask.java:192)
    atorg.apache.catalina.core.ContainerBase.startInternal(ContainerBase.java:1123)
    atorg.apache.catalina.core.StandardEngine.startInternal(StandardEngine.java:300)
    atorg.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
    atorg.apache.catalina.core.StandardService.startInternal(StandardService.java:443)
    atorg.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
    atorg.apache.catalina.core.StandardServer.startInternal(StandardServer.java:739)
    atorg.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
    atorg.apache.catalina.startup.Catalina.start(Catalina.java:689)
    atsun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    atsun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    atsun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    atjava.lang.reflect.Method.invoke(Method.java:483)
    atorg.apache.catalina.startup.Bootstrap.start(Bootstrap.java:321)
    atorg.apache.catalina.startup.Bootstrap.main(Bootstrap.java:455)
Caused by: org.apache.catalina.LifecycleException: Failed to startcomponent [StandardEngine[Catalina].StandardHost[localhost]]
    atorg.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:154)
    atorg.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1575)
    atorg.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1565)
    atjava.util.concurrent.FutureTask.run(FutureTask.java:266)
    atjava.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
    atjava.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
    atjava.lang.Thread.run(Thread.java:745)
Caused by: org.apache.catalina.LifecycleException: A childcontainer failed during start
    atorg.apache.catalina.core.ContainerBase.startInternal(ContainerBase.java:1131)
    atorg.apache.catalina.core.StandardHost.startInternal(StandardHost.java:816)
    atorg.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
    ... 6more

八月 22, 2014 10:02:26 上午 org.apache.catalina.startup.Catalinastart
严重: The required Server component failed to start so Tomcat isunable to start.
org.apache.catalina.LifecycleException: Failed to start component[StandardServer[8005]]
    atorg.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:154)
    atorg.apache.catalina.startup.Catalina.start(Catalina.java:689)
    atsun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    atsun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    atsun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    atjava.lang.reflect.Method.invoke(Method.java:483)
    atorg.apache.catalina.startup.Bootstrap.start(Bootstrap.java:321)
    atorg.apache.catalina.startup.Bootstrap.main(Bootstrap.java:455)
Caused by: org.apache.catalina.LifecycleException: Failed to startcomponent [StandardService[Catalina]]
    atorg.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:154)
    atorg.apache.catalina.core.StandardServer.startInternal(StandardServer.java:739)
    atorg.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
    ... 7more
Caused by: org.apache.catalina.LifecycleException: Failed to startcomponent [StandardEngine[Catalina]]
    atorg.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:154)
    atorg.apache.catalina.core.StandardService.startInternal(StandardService.java:443)
    atorg.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
    ... 9more
Caused by: org.apache.catalina.LifecycleException: A childcontainer failed during start
    atorg.apache.catalina.core.ContainerBase.startInternal(ContainerBase.java:1131)
    atorg.apache.catalina.core.StandardEngine.startInternal(StandardEngine.java:300)
    atorg.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
    ... 11more
注意：使用tomcat做服务器运行web项目，一定要将所需jar包放在工程的WEB-INF/lib下。