Getting exception "Not using JDBC" while using quarkus-hibernate-reactive-panache with quarkus-reactive-mysql-client - (Quarkus 1.12.2.Final) - quarkus

Question

Quarkus 1.12.2.Final
Getting the following exception while using reactive hibernate (quarkus-hibernate-reactive-panache) with reactive MySQL client (quarkus-reactive-mysql-client), kindly suggests what could be the issue.
2021-04-01 11:35:28,694 ERROR [org.hib.eng.jdb.spi.SqlExceptionHelper] (Quarkus Main Thread) Not using JDBC
2021-04-01 11:35:28,727 ERROR [io.qua.run.Application] (Quarkus Main Thread) Failed to start application (with profile dev): java.sql.SQLException: Not using JDBC
at org.hibernate.reactive.provider.service.NoJdbcConnectionProvider.getConnection(NoJdbcConnectionProvider.java:25)
at org.hibernate.engine.jdbc.env.internal.JdbcEnvironmentInitiator$ConnectionProviderJdbcConnectionAccess.obtainConnection(JdbcEnvironmentInitiator.java:180)
Some details
My application.properties
quarkus.datasource.jdbc=false
quarkus.datasource.db-kind=mysql
quarkus.datasource.username=root
quarkus.datasource.password=root
quarkus.datasource.reactive.url=mysql://localhost:3306/mydb
quarkus.datasource.reactive.max-size=20
My Repository Implementation
#ApplicationScoped public class EventRepository implements PanacheRepository<Event> {
}

Answer 1

Change your application.properties to
quarkus.datasource.db-kind=mysql
quarkus.datasource.username=root
quarkus.datasource.password=root
quarkus.datasource.reactive.url=vertx-reactive:mysql://localhost:3306/mydb
quarkus.datasource.reactive.max-size=20

Answer 2

Here is the cause of the problem -> I used property "quarkus.hibernate-orm.database.generation=update". It seems like the use of this property requires JDBC connection, removed it, and it's working fine.
Any of the below config sets can work.
quarkus.datasource.db-kind=mysql
quarkus.datasource.username=****
quarkus.datasource.password=****
quarkus.datasource.reactive.url=mysql://localhost:3306/db
or
quarkus.datasource.reactive.url=vertx-reactive:mysql://localhost:3306/db

Answer 3

"The latest version available of Hibernate Reactive doesn't support schema update and validation yet."
Relative issue here:
Not using JDBC problem met in native build · Issue #19918 · quarkusio/quarkus · GitHub

Answer 4

Can you try to add the following property to your settings?
quarkus.hibernate-orm.database.generation=update
You can write drop-and-create to re-create your db when you run your server as well. See details here.

Answer 5

Hmm. JDBC and Hibernate update should work in your case. Do you have a JDBC extension (dependency) in your project? If not, try to ad one.
In case of a postgres you can add extension this way:
./mvnw quarkus:add-extension -Dextensions="jdbc-postgresql
More info here
Add the agroal extension plus one of jdbc-db2, jdbc-derby, jdbc-h2, jdbc-mariadb, jdbc-mssql, jdbc-mysql, jdbc-oracle or jdbc-postgresql.
https://quarkus.io/guides/datasource

Answer 6

Add this dependency to your pom.xml file.
<!-- https://mvnrepository.com/artifact/io.quarkus/quarkus-jdbc-postgresql -->
<dependency>
<groupId>io.quarkus</groupId>
<artifactId>quarkus-jdbc-postgresql</artifactId>
<version>2.9.2.Final</version>
</dependency>