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com.****点击查看.JdbcRuntimeException: jdbc框架执行发生了异常 jdbc execute failured sorry -_- with nested exception: query error [Message:] Communications link failure The last packet successfully received from the server was 3,492,892 milliseconds ago. The last packet sent successfully to the server was 1 milliseconds ago. with nested exception: Communications link failure The last packet successfully received from the server was 3,492,892 milliseconds ago. The last packet sent successfully to the server was 1 milliseconds ago.