druid报错Cannot open connection; uncategorized SQLException for SQL [???]; SQL state [null]; error code [0]; loopWaitCount 0

【druid报错Cannot open connection; uncategorized SQLException for SQL [???]; SQL state [null]; error code [0]; loopWaitCount 0】

druid报错Cannot open connection; uncategorized SQLException for SQL [???]; SQL state [null]; error code [0]; loopWaitCount 0

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Druid报告了一个错误,无法打开连接;SQL的未分类SQLException???];SQL状态[null];错误代码[0];LoopWaitCount 0druid报告了一个错误,无法打开连接;SQL的未分类SQLException???];SQL状态[null];错误代码[0];loopWaitCount 0介绍:报错时间长,重启服务器后正常 。@文韶起因于:org . spring framework . JDBC . uncategorizedsqlexception:Hiberna