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  1. ,
    Expert tip

    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

  2. ,

    Make sure you are using InnoDB storage engine and READ-COMMITTED transaction isolation level and increase the database server innodb_lock_wait_timeout variable to about 500.

Solutions on the web

via Spring JIRA by cemo koc, 1 year ago
Conversion not supported for type xxx.enums.Gender
via Spring JIRA by cemo koc, 2 years ago
Conversion not supported for type xxx.enums.Gender
via Stack Overflow by Dhinakar
, 1 year ago
Can not issue SELECT via executeUpdate().
via Stack Overflow by sorin penteleiciuc
, 1 year ago
The connection property 'failOverReadOnly' only accepts values of the form: 'true', 'false', 'yes' or 'no'. The value 'false,address=(type=master)(protocol=tcp)(host=localhost)(port=3306)(user=test)(password=test)/dbname2?failOverReadOnly=false' is not in this set.
via Stack Overflow by Muhammad Kashif
, 1 year ago
No value specified for parameter 1
via Stack Overflow by Unknown author, 2 years ago
java.sql.SQLException: Conversion not supported for type xxx.enums.Gender	at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:1094)	at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:997)	at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:983)	at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:928)	at com.mysql.jdbc.ResultSetImpl.getObject(ResultSetImpl.java:5121)	at com.mysql.jdbc.JDBC4ResultSet.getObject(JDBC4ResultSet.java:542)	at org.springframework.jdbc.support.JdbcUtils.getResultSetValue(JdbcUtils.java:197)	at org.springframework.jdbc.core.BeanPropertyRowMapper.getColumnValue(BeanPropertyRowMapper.java:311)	at org.springframework.jdbc.core.BeanPropertyRowMapper.mapRow(BeanPropertyRowMapper.java:249)	at org.springframework.jdbc.core.RowMapperResultSetExtractor.extractData(RowMapperResultSetExtractor.java:93)	at org.springframework.jdbc.core.RowMapperResultSetExtractor.extractData(RowMapperResultSetExtractor.java:60)	at org.springframework.jdbc.core.JdbcTemplate$1.doInPreparedStatement(JdbcTemplate.java:705)	at org.springframework.jdbc.core.JdbcTemplate.execute(JdbcTemplate.java:641)