com.alibaba.druid.pool.DruidDataSource[612] - init datasource error

2017-09-24 11:38:35,294 ERROR - com.alibaba.druid.pool.DruidDataSource[612] - init datasource error
java.sql.SQLException: unsupported construct
at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:1074)
at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:4074)

.........

2017-09-24 11:38:35,307 ERROR - com.alibaba.druid.pool.DruidDataSource[629] - dataSource init error
java.sql.SQLException: unsupported construct
at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:1074)

.........

2017-09-24 11:38:35,311 ERROR - org.apache.ibatis.mapping.VendorDatabaseIdProvider[51] - Could not get a databaseId from dataSource
java.sql.SQLException: unsupported construct
At com.mysql.jdbc.SQLError.createSQLException(SQLError.java:1074)

environment:
mysql-connector-java-5.1.21.jar
druid-1.0.5.jar

upgrade to mysql-connector-java-5.1.22. jar

problem solving