mysql出現Connection.close() has already been called. Invalid operation in this state.
今天上服務器發現tomcat 裏面報以下錯誤 可是網站並無掛 後來找了原來java 16-Nov-2016 11:43:08.437 警告 [http-nio-8989-exec-5] com.mchange.v2.c3p0.impl.NewPooledConnection.handleThrowable [c3p0] A PooledConnection that has already sig
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