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网站问题 Cannot open connection Exception

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已经完成了几部分了,上传到服务器,也运行了好长时间,结果今天频繁的出现Cannot open connection Exception 每次都要重启tomcat才好,这也不是办法呀,上网查,说是连接没关闭,有说dbcp改成c3p0就好了,还没试。
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