嚴(yán)重: A child container failed during startjava.util.concurrent.ExecutionException: org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Catalina].StandardHost[localhost].StandardContext[/o2o]]?? ?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:943)?? ?at org.apache.catalina.core.StandardHost.startInternal(StandardHost.java:871)?? ?at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:145)?? ?at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1408)?? ?at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1398)?? ?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[/o2o]]?? ?at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:162)?? ?... 6 moreCaused by: org.apache.catalina.LifecycleException: Failed to start component [org.apache.catalina.webresources.StandardRoot@5bfcc9ca]?? ?at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:162)?? ?at org.apache.catalina.core.StandardContext.resourcesStart(StandardContext.java:4969)?? ?at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5099)?? ?at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:145)?? ?... 6 more