获取java.lang.IllegalStateException，如何更正？

Question

为什么在运行服务器时始终打印此异常？

NFO: Illegal access: this web application instance has been stopped already. Could not load java.net.BindException. 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:1600) at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1559) at com.mysql.jdbc.SQLError.createLinkFailureMessageBasedOnHeuristics(SQLError.java:1220) at com.mysql.jdbc.exceptions.jdbc4.CommunicationsException.<init>(CommunicationsException.java:57) at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source) at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source) at java.lang.reflect.Constructor.newInstance(Unknown Source) at com.mysql.jdbc.Util.handleNewInstance(Util.java:406)

Answer 1

将旧的mysql-connector-java-5.X-bin.jar更改为最新的mysql-connector-java-5.1.38-bin.jar

在此处获取： http://dev.mysql.com/downloads/connector/j/