java.lang.IllegalStateException

1、错误描述

四月 12, 2015 2:17:54 下午 org.apache.catalina.core.ApplicationContext log
信息: Initializing Spring FrameworkServlet 'appServlet'
四月 12, 2015 2:17:56 下午 org.apache.catalina.core.StandardContext reload
信息: Reloading Context with name [/CMP] is completed
四月 12, 2015 2:18:41 下午 org.apache.catalina.loader.WebappClassLoader loadClass
信息: Illegal access: this web application instance has been stopped already.  Could not load net.sf.ehcache.store.compound.CompoundStore$KeySet.  The eventual following stack trace is caused by an error thrown for debugging purposes as well as to attempt to terminate the thread which caused the illegal access, and has no functional impact.
java.lang.IllegalStateException
	at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1612)
	at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1571)
	at net.sf.ehcache.store.compound.CompoundStore.keySet(CompoundStore.java:216)
	at net.sf.ehcache.store.compound.factories.DiskStorageFactory$DiskExpiryTask.run(DiskStorageFactory.java:690)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471)
	at java.util.concurrent.FutureTask.runAndReset(FutureTask.java:304)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$301(ScheduledThreadPoolExecutor.java:178)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)

3、解决办法

java.lang.IllegalStateException

原文：http://blog.csdn.net/you23hai45/article/details/45015297