Server Tomcat v9.0 Server at localhost failed to start.

eclipse做springmvc在Tomcat运行时遇到问题，搞了一个下午，愣是没找到错误
java.lang.NullPointerException: Cannot invoke "org.apache.tomcat.util.collections.SynchronizedStack.clear()" because "this.nioChannels" is null

• 请看👉 ：Server Tomcat v9.0 Server at localhost failed to start.