异常重现
SSM项目集成Log4j日志系统，在tomcat中运行，点击idea的红色停止按钮停止项目时，控制台出现一个关于Log4j的java.lang.NoClassDefFoundError:org/apache/logging/log4j/message/ParameterizedNoReferenceMessageFactory$StatusMessage异常，详细异常信息如下：
Exception in thread "pool-1-thread-1" java.lang.NoClassDefFoundError: org/apache/logging/log4j/message/ParameterizedNoReferenceMessageFactory$StatusMessage
at org.apache.logging.log4j.message.ParameterizedNoReferenceMessageFactory.newMessage(ParameterizedNoReferenceMessageFactory.java:105)
at org.apache.logging.log4j.message.AbstractMessageFactory.newMessage(AbstractMessageFactory.java:75)
at org.apache.logging.log4j.spi.AbstractLogger.logMessage(AbstractLogger.java:2010)
at org.apache.logging.log4j.spi.AbstractLogger.logIfEnabled(AbstractLogger.java:1884)
at org.apache.logging.log4j.spi.AbstractLogger.error(AbstractLogger.java:793)
at org.apache.logging.log4j.core.util.DefaultShutdownCallbackRegistry.run(DefaultShutdownCallbackRegistry.java:74)
at java.lang.Thread.run(Thread.java:748)
Caused by: java.lang.ClassNotFoundException: Illegal access: this web application instance has been stopped already. Could not load [org.apache.logging.log4j.message.ParameterizedNoReferenceMessageFactory$StatusMessage]. The following stack trace is thrown for debugging purposes as well as to attempt to terminate the thread which caused the illegal access.
at org.apache.catalina.loader.WebappClassLoaderBase.checkStateForClassLoading(WebappClassLoaderBase.java:1343)
at org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1206)
at org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1167)
... 7 more
Caused by: java.lang.IllegalStateException: Illegal access: this web application instance has been stopped already. Could not load [org.apache.logging.log4j.message.ParameterizedNoReferenceMessageFactory$StatusMessage]. 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:1353)
at org.apache.catalina.loader.WebappClassLoaderBase.checkStateForClassLoading(WebappClassLoaderBase.java:1341)
... 9 more
2020年3月29日大约 2 分钟