Home >Java >javaTutorial >How to resolve the Jandex indexing warning for external module classes in Quarkus?
When integrating classes from external modules into your Quarkus application, you may encounter a warning stating that the classes are not registered in the Jandex index. This warning can arise when the external module contains CDI beans or entities that need to be indexed by Quarkus.
Quarkus uses the Jandex index to optimize the reflection process and enhance performance. By indexing classes, Quarkus can detect and utilize the presence of annotations, such as @Entity or @ApplicationScoped, without having to perform expensive runtime reflection.
To resolve the warning and ensure proper indexing of external module classes, you have several options:
For Maven-based projects, install the Jandex Maven plugin into the external module's pom.xml. This plugin will generate a Jandex index during the build process, ensuring that the necessary classes are included.
</p> <pre class="brush:php;toolbar:false"><build> <plugins> <plugin> <groupId>io.smallrye</groupId> <artifactId>jandex-maven-plugin</artifactId> <executions> <execution> <goals> <goal>jandex</goal> </goals> </execution> </executions> </plugin> </plugins> </build>
Adding an empty META-INF/beans.xml file in the external module will also trigger indexing by Quarkus itself.
If modifying the external module is not feasible, you can define index dependencies in your application.properties as follows:
<br>quarkus.index-dependency.<name>.group-id=<br>quarkus.index-dependency.<name>.artifact-id=<br>quarkus.index-dependency.<name>.classifier=(optional)<br>
Replace
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