MySQL doesn't support some types of characters (such as emojis) with the utf8 encoding. You need to be on MySQL 5.5+ and force utf8mb4 (everywhere, client and server). You can do this sending the query "SET NAMES utf8mb4". Check this https://goo.gl/3E2qzg
You have a different solution? A short tip here would help you and many other users who saw this issue last week.
- java.sql.SQLException: Streaming result set > com.mysql.jdbc.RowDataDynamic@32d051c1 is still active. No statements may > be > issued when any streaming result sets are open and in use on a given > connection. Ensure that you have called .close() on any active streaming > result sets before attempting more queries. at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:926) at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:923)