Tomcat 启动成功后报 INFO [Timer-0] org.apache.catalina.loader.WebappClassLoaderBase.checkStateForResourceLoading Illegal access:

1、某天页面忽然访问错误，查看日志发现没什么问题，使用万能的重启大法，重启后 tomcat 报错：

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文字版

27-Dec-2017 17:53:15.073 INFO [main] org.apache.coyote.AbstractProtocol.start Starting ProtocolHandler ["ajp-nio-19994"]
27-Dec-2017 17:53:15.077 INFO [main] org.apache.catalina.startup.Catalina.start Server startup in 10930 ms

27-Dec-2017 17:53:15.847 INFO [Timer-0] org.apache.catalina.loader.WebappClassLoaderBase.checkStateForResourceLoading Illegal access: this web application instance has been stopped already. Could not load [java.net.InetAddress]. The following stack trace is thrown for debugging purposes as well as to attempt to terminate the thread which caused the illegal access.java.lang.IllegalStateException: Illegal access: this web application instance has been stopped already. Could not load [java.net.InetAddress]. The following stack trace is thrown for debugging purposes as well as to attempt to terminate the thread which caused the illegal access.
at org.apache.catalina.loader.WebappClassLoaderBase.checkStateForResourceLoading(WebappClassLoaderBase.java:1325)
at org.apache.catalina.loader.WebappClassLoaderBase.checkStateForClassLoading(WebappClassLoaderBase.java:1313)
at org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1178)
at org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1139)
at org.quartz.utils.UpdateChecker.getClientId(UpdateChecker.java:149)
at org.quartz.utils.UpdateChecker.buildParamsString(UpdateChecker.java:120)
at org.quartz.utils.UpdateChecker.buildUpdateCheckUrl(UpdateChecker.java:114)
at org.quartz.utils.UpdateChecker.doCheck(UpdateChecker.java:55)
at org.quartz.utils.UpdateChecker.checkForUpdate(UpdateChecker.java:47)
at org.quartz.utils.UpdateChecker.run(UpdateChecker.java:39)
at java.util.TimerThread.mainLoop(Timer.java:555)
at java.util.TimerThread.run(Timer.java:505)

27-Dec-2017 17:53:15.850 INFO [Timer-0] org.apache.catalina.loader.WebappClassLoaderBase.checkStateForResourceLoading Illegal access: this web application instance has been stopped already. Could not load [java.net.URLEncoder]. The following stack trace is thrown for debugging purposes as well as to attempt to terminate the thread which caused the illegal access.java.lang.IllegalStateException: Illegal access: this web application instance has been stopped already. Could not load [java.net.URLEncoder]. The following stack trace is thrown for debugging purposes as well as to attempt to terminate the thread which caused the illegal access.
at org.apache.catalina.loader.WebappClassLoaderBase.checkStateForResourceLoading(WebappClassLoaderBase.java:1325)
at org.apache.catalina.loader.WebappClassLoaderBase.checkStateForClassLoading(WebappClassLoaderBase.java:1313)
at org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1178)
at org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1139)
at org.quartz.utils.UpdateChecker.urlEncode(UpdateChecker.java:156)
at org.quartz.utils.UpdateChecker.buildParamsString(UpdateChecker.java:122)
at org.quartz.utils.UpdateChecker.buildUpdateCheckUrl(UpdateChecker.java:114)
at org.quartz.utils.UpdateChecker.doCheck(UpdateChecker.java:55)
at org.quartz.utils.UpdateChecker.checkForUpdate(UpdateChecker.java:47)
at org.quartz.utils.UpdateChecker.run(UpdateChecker.java:39)
at java.util.TimerThread.mainLoop(Timer.java:555)
at java.util.TimerThread.run(Timer.java:505)

2、各种谷歌、度娘，未果，认真读报错，发现应该是代码中的定时问题：

屏蔽后无报错，报错原因是添加了（年份）字段，定时日期变成过期，无法启动~~
PS1：测试过去掉年份和将年份改为2020，均无错误
PS2：没有找到官方文档佐证~~