Drools kieContainer fail to create

Question

i'm trying to follow the exact same steps on this

Spring Boot Drools Rule Engine Example

but I have this error at compilation time :

Error creating bean with name 'kieContainer' defined in class path resource [.../DroolsConfig.class]: Failed to instantiate [org.kie.api.runtime.KieContainer]: Factory method 'kieContainer' threw exception with message: Cannot invoke "org.drools.compiler.compiler.Dialect.getBuilder(java.lang.Class)" because the return value of "org.drools.compiler.rule.builder.RuleBuildContext.getDialect()" is null ...................

those are the dependencies added to my pom.xml

            <groupId>org.drools</groupId>
            <artifactId>drools-core</artifactId>
            <version>8.33.0.Final</version>
        </dependency>

        <dependency>
            <groupId>org.drools</groupId>
            <artifactId>drools-compiler</artifactId>
            <version>8.33.0.Final</version>
        </dependency>

        <dependency>
            <groupId>org.drools</groupId>
            <artifactId>drools-decisiontables</artifactId>
            <version>8.33.0.Final</version>
        </dependency>```


I'm using spring boot 3

Thank you for your help!

I'm using java Records instead of normal class
 

Answer 1

I fixed it by adding this dependency to pom.xml

<dependency>
            <groupId>org.drools</groupId>
            <artifactId>drools-mvel</artifactId>
            <version>version...</version>
</dependency>