druid在tomcat下的问题

今天遇到一个问题

Exception in thread "Druid-ConnectionPool-Create-2040148568" java.lang.NoClassDefFoundError: ch/qos/logback/core/status/WarnStatus
at ch.qos.logback.classic.LoggerContext.noAppenderDefinedWarning(LoggerContext.java:186)
at ch.qos.logback.classic.Logger.callAppenders(Logger.java:264)
at ch.qos.logback.classic.Logger.buildLoggingEventAndAppend(Logger.java:421)
at ch.qos.logback.classic.Logger.filterAndLog_0_Or3Plus(Logger.java:383)
at ch.qos.logback.classic.Logger.log(Logger.java:765)
at org.apache.log4j.Category.differentiatedLog(Category.java:193)
at org.apache.log4j.Category.log(Category.java:297)
at com.alibaba.druid.support.logging.Log4jImpl.error(Log4jImpl.java:54)
at com.alibaba.druid.pool.DruidDataSource$CreateConnectionThread.run(DruidDataSource.java:2004)
Caused by: java.lang.ClassNotFoundException: Illegal access: this web application instance has been stopped already. Could not load [ch.qos.logback.core.status.WarnStatus]. 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:1295)

此错误看着是缺少类，但实际是其它问题造成。

我这边的问题是，数据库的地址不通。

druid在tomcat下的问题

原文：https://www.cnblogs.com/7lucky/p/druid.html