启动Tomcat报错 “A child container failed during start”

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[/scsv]]
 at java.util.concurrent.FutureTask.report(FutureTask.java:122)
 at java.util.concurrent.FutureTask.get(FutureTask.java:192)
 at org.apache.catalina.core.ContainerBase.startInternal(ContainerBase.java:1123)
 at org.apache.catalina.core.StandardHost.startInternal(StandardHost.java:799)
 at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
 at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1559)
 at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1549)
 at java.util.concurrent.FutureTask.run(FutureTask.java:266)
 at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
 at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
 at java.lang.Thread.run(Thread.java:745)
Caused by: org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Catalina].StandardHost[localhost].StandardContext[/jeesite]]
 at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:154)
 ... 6 more
Caused by: java.lang.NoClassDefFoundError: Lorg/slf4j/Logger;
 at java.lang.Class.getDeclaredFields0(Native Method)
 at java.lang.Class.privateGetDeclaredFields(Class.java:2583)
 at java.lang.Class.getDeclaredFields(Class.java:1916)
 at org.apache.catalina.util.Introspection.getDeclaredFields(Introspection.java:106)
 at org.apache.catalina.startup.WebAnnotationSet.loadFieldsAnnotation(WebAnnotationSet.java:261)
 at 

...

方案：

　　这是maven项目发布在Tomcat上的项目，我从Git上检出并发布后启动报错...

原因：

　　使用的是eclipse开发工具，发布后项目的lib中不会自动加载jar包。好像MyEclipse可以。

　　右键项目->Build Path -> Configure Build Path.. ->Deployment Assembly 

  -> 添加这个配置

 

重启服务即可。