尝试在AmazonEC2机器上的Apache tomcat 8.5上部署Maven项目以及当我在apache服务器上部署WAR文件时出现错误：

Question

Failed to start component [StandardEngine[Catalina].StandardHost[localhost].StandardContext[/DiagnosticCentre]]
        at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:167)
  at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:167)
        at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:754)
        at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:730)
        at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:734)
        at org.apache.catalina.startup.HostConfig.deployWAR(HostConfig.java:980)
        at org.apache.catalina.startup.HostConfig.deployApps(HostConfig.java:502)
        at org.apache.catalina.startup.HostConfig.check(HostConfig.java:1645)
        at sun.ref