The required Server component failed to start so Tomcat is unable to start问题解决
Server Tomcat v8.5 Server at localhost failed to start. 或者The required Server component failed to start so Tomcat is unable to start 问题。
解决方法；
1.双击Servers里面的Tomcat。
2.进入了Overview页面，把Publish module contexts to separate XML files选项勾上，问题解决。