Tomcat 啟動成功后報 INFO [Timer-0] org.apache.catalina.loader.WebappClassLoaderBase.checkStateForResourceLoading Illegal access:
1、某天頁面忽然訪問錯誤，查看日志發現沒什么問題，使用萬能的重啟大法，重啟后 tomcat 報錯：
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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、各種谷歌、度娘，未果，認真讀報錯，發現應該是代碼中的定時問題：
屏蔽后無報錯，報錯原因是添加了（年份）字段，定時日期變成過期，無法啟動~~
PS1：測試過去掉年份和將年份改為2020，均無錯誤
PS2：沒有找到官方文檔佐證~~