Micronaut Graalvm

In this tutorial, you'll learn about Fix Micronaut GraalVM Native Image Fails. We cover key concepts, practical examples, and best practices.

The Problem

GraalVM native image build fails with reflection or resource errors.

Quick Fix

Use Micronaut Gradle plugin

Wrong:

plugins {
    id 'java'
} // No Micronaut plugin

Output:

No native support

Right:

plugins {
    id 'io.micronaut.application' version '4.0.0'
}
micronaut {
    version = "4.0.0"
    runtime = "netty"
    testRuntime = "junit5"
    nativeTesting {
        enabled = true
    }
}

Output:

Native image configured

Add serialization config

Wrong:

// No @Introspected annotations
@Introspected
public class Product { }

Output:

Reflection not configured

Right:

@Introspected(classes = Product.class, visibility = Visibility.ANY)
public class Config { }

Output:

Reflection configuration added

Build native image

Wrong:

mvn package -Dpackaging=native-image
// Or gradle nativeImage

Output:

Build fails

Right:

./gradlew nativeCompile
// With proper native build tools

Output:

Native image built

Prevention

• Use Micronaut Gradle/Maven plugin with native support
• Add @Introspected annotations for reflection
• Install GraalVM native-image tool

Common Mistakes with graalvm

1. Using head and tail instead of pattern matching, causing runtime errors on empty lists
2. Forgetting that lazy evaluation defers computation until the value is forced, causing space leaks with unevaluated thunks
3. Using return to exit a function early instead of wrapping a pure value in the monad

These mistakes appear frequently in real-world MICRONAUT code. DodaTech's contributors have identified these patterns through analysis of open-source projects and production systems.

Practice Exercise

Write a pure function that safely divides two integers using Maybe, then test it with edge cases like division by zero and negative numbers.

This exercise reinforces the concepts covered in this guide. Try implementing it before checking online solutions.

FAQ

This quick fix is part of the DodaTech Spring & JVM ecosystem series. Built by the developers of Doda Browser, DodaZIP, and Durga Antivirus Pro.