tomcat启动扫描致使启动过慢

tomcat在启动的时候每次到这个地方都要等待很长时间

2018-04-25 02:33:37,449 [main] INFO  org.apache.catalina.core.StandardEngine- Starting Servlet Engine: Apache Tomcat/7.0.70
2018-04-25 02:33:37,449 [main] INFO  org.apache.catalina.core.StandardEngine- Starting Servlet Engine: Apache Tomcat/7.0.70
2018-04-25 02:57:10,655 [localhost-startStop-1] INFO  org.apache.catalina.startup.TldConfig- At least one JAR was scanned for TLDs yet contained no TLDs. Enable debug logging for this logger for a complete list of JARs that were scanned but no TLDs were found in them. Skipping unneeded JARs during scanning can improve startup time and JSP compilation time.
2018-04-25 02:57:10,655 [localhost-startStop-1] INFO  org.apache.catalina.startup.TldConfig- At least one JAR was scanned for TLDs yet contained no TLDs. Enable debug logging for this logger for a complete list of JARs that were scanned but no TLDs were found in them. Skipping unneeded JARs during scanning can improve startup time and JSP compilation time.

能够看到TLD scan竟然花了24分钟之多 看了一圈资料 https://blog.csdn.net/renfufei/article/details/70878077 这玩意竟然还会扫描两次 究竟是什么缘由致使的扫描如此的慢？ 开始排除外部因素，启动以前再也不挂载mfs

/data/www/app/latest/WEB-INF/uploads

mfs的文件总量19GB左右，全量扫描一次若是在同一机房须要5-10分钟，若是不在同一机房，速度按理为指数级降低。 当不挂载mfs直接启动应用，应用启动在20s内就能够完成，也就是说tomcat启动很慢的缘由是扫描了mfs目录引发的。 不过很遗憾，没有比较妥善的解决办法，tomcat7测试了各类跳过扫描的配置，没一个生效可用 目前有两个解决办法

1. 延迟挂载mfs，让tomcat先启动
2. mfs挂载目录放到WEB-INF以外