Unable to close prepared statement after determining SQL layout
You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'OPTION SQL_SELECT_LIMIT=DEFAULT' at line 1

问题原因：mysql驱动的原因，jar包不匹配

问题解决：更换jar包版本（mysql-connector-java-5.1.46.jar）解决