我的tomcat8在eclipse中配置好了之后，前几次编写dynamic web project正常启动，突然重新启动的时候开始报错。当在bin中启动tomcat时正常启动
信息: Creation of SecureRandom instance for session ID generation using [SHA1PRNG] took [250] milliseconds.
二月 08, 2015 1:32:57 下午 org.apache.catalina.core.ContainerBase startInternal
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[/testJSP]]
at java.util.concurrent.FutureTask.report(Unknown Source)
我是之前用的好好的，突然就启动失败！点eclipse工具栏的小猫可以启动，但是通过run on server运行文件就出错！