Mariadb with hibernate-6
Hello everyone,
In our WildFly based application, we are using mariadb-10.5.8 with mysql-connector as the driver. From the compatibility matrix, it appears that mariadb-10.2 and later are compatible with mysql-5.7
ORM we use is hibernate-6.2 and the documentation says MySQL-5.7 or higher and MariaDB-10.3 or higher are supported with out-of-box dialects. . So the mariadb we use should be compliant to hibernate-6 if we go by mariadb version or corresponding mysql version.
However, when we start our app, we get a WARNING message - "HHH000511: The 5.5.0 version for [org.hibernate.dialect.MySQLDialect] is no longer supported"
When we look at the connection meta-data returned from DB, it returns "MySQL" as the product-name and "5.5.5-10.5.8-MariaDB" as the product version. That seems to be the reason, hibernate is complaining. But if we connect with the mariadb-driver, it return "MariaDB" as the product name and "10.5.8-MariaDB" as the version.
- What does the 5.5.0 prefix signify in the version? Is it the compatible MySQL version? If so, why its not 5.7 as it appears from documentation that versions above mariadb-10.2 are compatible with mysql-5.7? - Is this WARNING a problem that warrant a DB migration or is there a community supported dialect as explained here - https://docs.jboss.org/hibernate/orm/6.2/migration-guide/migration-guide.htm...
-Rajesh
Hi, Rajesh,
On Jan 14, Rajesh Jose via discuss wrote:
Hello everyone,
In our WildFly based application, we are using mariadb-10.5.8 with mysql-connector as the driver. From the compatibility matrix, it appears that mariadb-10.2 and later are compatible with mysql-5.7
ORM we use is hibernate-6.2 and the documentation says MySQL-5.7 or higher and MariaDB-10.3 or higher are supported with out-of-box dialects. . So the mariadb we use should be compliant to hibernate-6 if we go by mariadb version or corresponding mysql version.
However, when we start our app, we get a WARNING message - "HHH000511: The 5.5.0 version for [org.hibernate.dialect.MySQLDialect] is no longer supported"
When we look at the connection meta-data returned from DB, it returns "MySQL" as the product-name and "5.5.5-10.5.8-MariaDB" as the product version. That seems to be the reason, hibernate is complaining. But if we connect with the mariadb-driver, it return "MariaDB" as the product name and "10.5.8-MariaDB" as the version.
- What does the 5.5.0 prefix signify in the version? Is it the compatible MySQL version? If so, why its not 5.7 as it appears from documentation that versions above mariadb-10.2 are compatible with mysql-5.7?
This prefix was added in MariaDB 10.0 - at that time MySQL replication slave detected the master version by looking at the first character in the version string. So 10.0 was detected as some imaginary "MySQL 1.x", which replication code doesn't support. MariaDB started sending this prefix to workaround MySQL bug, to keep MariaDB->MySQL replication working.
Native MariaDB connectors know about this prefix and remove it automatically, but MySQL connectors, naturally, don't.
Now MySQL replication checks the version correctly and we've recently removed this workaround from MariaDB server.
So, you can use a newer MariaDB version, you can use a native MariaDB connector, or - this is the easiest - you can fake any version you want, just add version=10.5.8-MariaDB to your my.cnf.
Regards, Sergei Chief Architect, MariaDB Server and security@mariadb.org
Thanks Sergie! This is very useful information.
-Rajesh
On Sun, Jan 14, 2024 at 4:28 PM Sergei Golubchik serg@mariadb.org wrote:
Hi, Rajesh,
On Jan 14, Rajesh Jose via discuss wrote:
Hello everyone,
In our WildFly based application, we are using mariadb-10.5.8 with mysql-connector as the driver. From the compatibility matrix, it appears that mariadb-10.2 and later are compatible with mysql-5.7
ORM we use is hibernate-6.2 and the documentation says MySQL-5.7 or higher and MariaDB-10.3 or higher are supported with out-of-box dialects. . So the mariadb we use should be compliant to hibernate-6 if we go by mariadb version or corresponding mysql version.
However, when we start our app, we get a WARNING message - "HHH000511: The 5.5.0 version for [org.hibernate.dialect.MySQLDialect] is no longer supported"
When we look at the connection meta-data returned from DB, it returns "MySQL" as the product-name and "5.5.5-10.5.8-MariaDB" as the product version. That seems to be the reason, hibernate is complaining. But if we connect with the mariadb-driver, it return "MariaDB" as the product name and "10.5.8-MariaDB" as the version.
- What does the 5.5.0 prefix signify in the version? Is it the compatible MySQL version? If so, why its not 5.7 as it appears from documentation that versions above mariadb-10.2 are compatible with mysql-5.7?
This prefix was added in MariaDB 10.0 - at that time MySQL replication slave detected the master version by looking at the first character in the version string. So 10.0 was detected as some imaginary "MySQL 1.x", which replication code doesn't support. MariaDB started sending this prefix to workaround MySQL bug, to keep MariaDB->MySQL replication working.
Native MariaDB connectors know about this prefix and remove it automatically, but MySQL connectors, naturally, don't.
Now MySQL replication checks the version correctly and we've recently removed this workaround from MariaDB server.
So, you can use a newer MariaDB version, you can use a native MariaDB connector, or - this is the easiest - you can fake any version you want, just add version=10.5.8-MariaDB to your my.cnf.
Regards, Sergei Chief Architect, MariaDB Server and security@mariadb.org
participants (2)
-
Rajesh Jose -
Sergei Golubchik