关闭tomcat报错，网络搜索整理 严重: The web application [/img] registered the JDBC driver [com.mysql.jdbc.Driver] but failed to unregister it when the web application was stopped. To prevent a memory leak, the JDBC Driver has been forcibly unregistered.
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报错1：Unable to read local eventlog (reason: 事件日志文件已在读取间更改。
报错2：Successfully re-opened the local eventlog – NOTE: Some events may have been missed.
微软解释：
http://support.microsoft.com/default.aspx?scid=kb;en-us;811484
解决办法：
如果要防止错误日志, 中出现这些消息可以使用跟踪标志 2
一：查看你下载的MySQL和mysql-connector-java，如果不对应的话肯定会报错。
对应规则：
mysql-connector-java-5
Connector/J version
Driver Type
JDBC version
MySQL Server version
Status
5.1
4
3.0, 4.0, 4.1, 4.2
4.1, 5.0, 5.1, 5.5, 5.6, 5.7
Recommended version
5.0
4
3.0
4.1, 5
