java.sql.SQLException: Unknown system variable 'query_cache_size'

query_cache_size was removed in MySQL 8. Check the docs.

It works with JDBC driver 5.1.44.

I had a similar problem. I resolved it by specifying the version in mysql dependency

<dependency>
    <groupId>mysql</groupId>
    <artifactId>mysql-connector-java</artifactId>
    <version>5.1.45</version>
    <scope>runtime</scope>
</dependency>

Worked like a charm for me.

java.sql.SQLException: Unknown system variable 'query_cache_size'

In pom file of your project, just update the version of the dependency.

For example it's 6.0.2 of mysql java connector just update it to latest one like 8.0.11

It works!!!!

Try using MySQL 8.0.3 As can be seen on the docs, the query_cache_size was removed on MySQL8. JetBrains guys have suffered the same issue, is seems to be that it is fixed by updating the driver to the version MySQL JDBC driver v 5.1.44.