Server Tomcat v8.5 Server at localhost was unable to start within 45 seconds

问题:
Server Tomcat v8.0 Server at localhost was unable to start within 45 seconds. If the server requires more time, try increasing the timeout in the server editor.
Java Web项目启动调试时,提示此错误,如下图:
Server Tomcat v8.5 Server at localhost was unable to start within 45 seconds
这种情况存在两种可能,一种是项目配置有错误(可能是数据库、Redis之类的配置错误,也可能是相关的服务没有启动,防火墙之类的);

另一种是项目启动的确实比较慢,需要更长的时间,解决方法如下:

打开Server视图,双击Tomcat v8.5 Server
将启动时间限制改大:
Server Tomcat v8.5 Server at localhost was unable to start within 45 seconds
按Ctrl+S保存,然后再启动调试。
如果时间已经改的很大了,还是不能启动成功,有以下两种情况:

1、项目配置有问题;

2、tomcat 的 webapps 目录下还有其它的项目,导致服务启动失败了,尝试删除其它项目,再启动调试看看。
Server Tomcat v8.5 Server at localhost was unable to start within 45 seconds