又来问问题了
在用tomcat6.0.16项目热部署的时候，在tomcat manager url 下做application deploy-->undeploy-->deploy，此时下面的log就重复出现，当将tomcat shutdown之后，下面这段log在TOMCAT_HOME/logs/catalina.out中重复出现，我们分析是某个线程在tomcat shutdown之后依然运行，我想知道上述情况会不会对性能有影响？

Jul 13, 2010 9:36:49 AM org.apache.catalina.loader.WebappClassLoader loadClass
INFO: Illegal access: this web application instance has been stopped already.  Could not load net.rubyeye.xmemcached.exception.UnknownCommandException.  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:1370)
        at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1329)
        at net.rubyeye.xmemcached.impl.MemcachedHandler.onSessionIdle(MemcachedHandler.java:156)
        at com.google.code.yanf4j.core.impl.AbstractSession.onIdle(AbstractSession.java:193)
        at com.google.code.yanf4j.nio.impl.AbstractNioSession.onEvent(AbstractNioSession.java:418)
        at com.google.code.yanf4j.nio.impl.Reactor.checkIdle(Reactor.java:470)
        at com.google.code.yanf4j.nio.impl.Reactor.checkExpiredIdle(Reactor.java:461)
        at com.google.code.yanf4j.nio.impl.Reactor.checkSessionTimeout(Reactor.java:361)
        at com.google.code.yanf4j.nio.impl.Reactor.run(Reactor.java:120)
Jul 13, 2010 9:36:54 AM org.apache.catalina.loader.WebappClassLoader loadClass