这是什么错误?怎样修复?Couldnotloadcom.mysql.jdbc.SQLError.信息:Illegalaccess:thiswebapplicationinstancehasbeenstoppedalready.Couldnotloadcom.mysql.jdbc.SQLError.Theeventualfollowingstacktraceiscausedbyanerrorthrown

Question

这是什么错误?怎样修复?Could not load com.mysql.jdbc.SQLError.
信息:Illegal access:this web application instance has been stopped already.Could not load com.mysql.jdbc.SQLError.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
\x09at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1587)
\x09at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1546)
\x09at com.mysql.jdbc.MysqlIO.send(MysqlIO.java:3270)
\x09at com.mysql.jdbc.MysqlIO.quit(MysqlIO.java:1659)
\x09at com.mysql.jdbc.ConnectionImpl.realClose(ConnectionImpl.java:4296)
\x09at com.mysql.jdbc.ConnectionImpl.cleanup(ConnectionImpl.java:1265)
\x09at com.mysql.jdbc.ConnectionImpl.finalize(ConnectionImpl.java:2667)
\x09at java.lang.System$2.invokeFinalize(System.java:1213)
\x09at java.lang.ref.Finalizer.runFinalizer(Finalizer.java:98)
\x09at java.lang.ref.Finalizer.access$100(Finalizer.java:34)
\x09at java.lang.ref.Finalizer$FinalizerThread.run(Finalizer.java:210)

Answer 1

Web服务停止了,无法连接数据库,我看这些错误信息,应该是你的MySql的驱动有问题,你要把它放在lib文件下,如果用连接池 把mysql的驱动包放入到 tomcat5.x 版本的 common\lib,如果是tomcat 6.x就直接放到 lib目录下 ,的下面 这样就会好 如果用jdbc 那就放到工程下面的lib就ok了