tomcat啓動的時候，提示如下的錯誤
java.util.concurrent.ExecutionException: org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Catalina].StandardHost[localhost].StandardContext[/web]]
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:917)
at org.apache.catalina.core.StandardHost.startInternal(StandardHost.java:871)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1409)
at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1399)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
at java.lang.Thread.run(Thread.java:748)
Caused by: org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Catalina].StandardHost[localhost].StandardContext[/web]]
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:154)
... 6 more
Caused by: java.lang.IllegalStateException: Unable to complete the scan for annotations for web application [/web] due to a StackOverflowError. Possible root causes include a too low setting for -Xss and illegal cyclic inheritance dependencies. The class hierarchy being processed was [org.apache.commons.httpclient.HttpException->org.apache.commons.httpclient.URIException->org.apache.commons.httpclient.HttpException]
at org.apache.catalina.startup.ContextConfig.checkHandlesTypes(ContextConfig.java:2067)
at org.apache.catalina.startup.ContextConfig.processAnnotationsStream(ContextConfig.java:2013)
at org.apache.catalina.startup.ContextConfig.processAnnotationsJar(ContextConfig.java:1962)
at org.apache.catalina.startup.ContextConfig.processAnnotationsUrl(ContextConfig.java:1937)
at org.apache.catalina.startup.ContextConfig.processAnnotations(ContextConfig.java:1898)
at org.apache.catalina.startup.ContextConfig.webConfig(ContextConfig.java:1149)
at org.apache.catalina.startup.ContextConfig.configureStart(ContextConfig.java:771)
at org.apache.catalina.startup.ContextConfig.lifecycleEvent(ContextConfig.java:305)
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:5061)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
... 6 more
從上面的錯誤信息中，我們可以看出，出現了循環引用，org.apache.commons.httpclient.HttpException->org.apache.commons.httpclient.URIException->org.apache.commons.httpclient.HttpException，最後導致堆棧溢出
查看項目，發現org.apache.commons.httpclient.HttpException這個類同時在兩個架包中存在，分別是
jbossall-client.jar和commons-httpclient-3.0.jar
所以，我們需要去掉一個架包，然後重啓，tomcat就可以正常啓動了。