求大神分析分析
tomcat版本：apache-tomcat-6.0.35
我怀疑多半是工程的问题，可是我找不出原因，以前我做的web项目，都支持热部署的，java类修改后，会自动生效，不用重启服务器，很方便。可是最近这个项目，随便修改一点java代码，比如就是在方法里加一个空白行，tomcat都会自动重启，最恶心的是，重启还总是报错，停在WebappClassLoader.loaderClass，还找不到源文件，最后报以下错误：
2013-2-20 10:44:29 org.apache.catalina.loader.WebappClassLoader loadClass
信息: Illegal access: this web application instance has been stopped already. Could not load org.apache.mina.util.SessionLog. 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:1566)
at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1526)
at org.apache.mina.common.support.AbstractIoFilterChain.callNextExceptionCaught(AbstractIoFilterChain.java:348)
at org.apache.mina.common.support.AbstractIoFilterChain.access$1000(AbstractIoFilterChain.java:53)
at org.apache.mina.common.support.AbstractIoFilterChain$EntryImpl$1.exceptionCaught(AbstractIoFilterChain.java:643)
at org.apache.mina.common.IoFilterAdapter.exceptionCaught(IoFilterAdapter.java:75)
at org.apache.mina.common.support.AbstractIoFilterChain.callNextExceptionCaught(AbstractIoFilterChain.java:345)
at org.apache.mina.common.support.AbstractIoFilterChain.access$1000(AbstractIoFilterChain.java:53)
at org.apache.mina.common.support.AbstractIoFilterChain$EntryImpl$1.exceptionCaught(AbstractIoFilterChain.java:643)
at org.apache.mina.common.support.AbstractIoFilterChain$HeadFilter.exceptionCaught(AbstractIoFilterChain.java:494)
at org.apache.mina.common.support.AbstractIoFilterChain.callNextExceptionCaught(AbstractIoFilterChain.java:345)
at org.apache.mina.common.support.AbstractIoFilterChain.fireExceptionCaught(AbstractIoFilterChain.java:334)
at org.apache.mina.common.support.AbstractIoFilterChain.callNextSessionIdle(AbstractIoFilterChain.java:287)
at org.apache.mina.common.support.AbstractIoFilterChain.access$900(AbstractIoFilterChain.java:53)
at org.apache.mina.common.support.AbstractIoFilterChain$EntryImpl$1.sessionIdle(AbstractIoFilterChain.java:638)
at org.apache.mina.common.IoFilterAdapter.sessionIdle(IoFilterAdapter.java:70)
at org.apache.mina.common.support.AbstractIoFilterChain.callNextSessionIdle(AbstractIoFilterChain.java:284)
at org.apache.mina.common.support.AbstractIoFilterChain.access$900(AbstractIoFilterChain.java:53)
at org.apache.mina.common.support.AbstractIoFilterChain$EntryImpl$1.sessionIdle(AbstractIoFilterChain.java:638)
at org.apache.mina.common.support.AbstractIoFilterChain$HeadFilter.sessionIdle(AbstractIoFilterChain.java:489)
at org.apache.mina.common.support.AbstractIoFilterChain.callNextSessionIdle(AbstractIoFilterChain.java:284)
at org.apache.mina.common.support.AbstractIoFilterChain.fireSessionIdle(AbstractIoFilterChain.java:278)
at org.apache.mina.transport.socket.nio.SocketIoProcessor.notifyIdleness0(SocketIoProcessor.java:289)
at org.apache.mina.transport.socket.nio.SocketIoProcessor.notifyIdleness(SocketIoProcessor.java:271)
at org.apache.mina.transport.socket.nio.SocketIoProcessor.notifyIdleness(SocketIoProcessor.java:260)
at org.apache.mina.transport.socket.nio.SocketIoProcessor.access$700(SocketIoProcessor.java:45)
at org.apache.mina.transport.socket.nio.SocketIoProcessor$Worker.run(SocketIoProcessor.java:490)
at org.apache.mina.util.NamePreservingRunnable.run(NamePreservingRunnable.java:51)