에러메세지 java.lang.AbstractMethodError: com.mysql.jdbc.Connection.isValid(I)Z at com.zaxxer.hikari.pool.PoolBase.checkValidationSupport(PoolBase.java:464) ~[HikariCP-4.0.3.jar:na] at com.zaxxer.hikari.pool.PoolBase.checkDriverSupport(PoolBase.java:447) ~[HikariCP-4.0.3.jar:na] at com.zaxxer.hikari.pool.PoolBase.setupConnection(PoolBase.java:416) ~[HikariCP-4.0.3.jar:na] at com.zaxxer.hikari.pool.Po..