apache/maven · error · DIException

Not allowed to set injectable field {}

Error message

Not allowed to set injectable field {}

What it means

Error "Not allowed to set injectable field {}" thrown in apache/maven.

Source

Thrown at impl/maven-di/src/main/java/org/apache/maven/di/impl/ReflectionUtils.java:239

                .collect(toList());
        return BindingInitializer.combine(initializers);
    }

    public static <T> BindingInitializer<T> fieldInjector(Key<T> container, Field field) {
        field.setAccessible(true);
        Key<Object> key = keyOf(container.getType(), field.getGenericType(), field);
        boolean optional = field.isAnnotationPresent(Nullable.class);
        Dependency<Object> dep = new Dependency<>(key, optional);
        return new BindingInitializer<T>(Collections.singleton(dep)) {
            @Override
            public Consumer<T> compile(Function<Dependency<?>, Supplier<?>> compiler) {
                Supplier<?> binding = compiler.apply(dep);
                return (T instance) -> {
                    Object arg = binding.get();
                    try {
                        field.set(instance, arg);
                    } catch (IllegalAccessException e) {
                        throw new DIException("Not allowed to set injectable field " + field, e);
                    }
                };
            }
        };
    }

    public static <T> BindingInitializer<T> methodInjector(Key<T> container, Method method) {
        method.setAccessible(true);
        Dependency<?>[] dependencies = toDependencies(container.getType(), method);
        return new BindingInitializer<T>(new HashSet<>(Arrays.asList(dependencies))) {
            @Override
            public Consumer<T> compile(Function<Dependency<?>, Supplier<?>> compiler) {
                return instance -> {
                    Object[] args = getDependencies().stream()
                            .map(compiler)
                            .map(Supplier::get)
                            .toArray();
                    try {

View on GitHub (pinned to e4093d4e12)

When it happens

Trigger: Thrown at impl/maven-di/src/main/java/org/apache/maven/di/impl/ReflectionUtils.java:239 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of apache/maven@e4093d4e12 (2026-08-21). Data as JSON: /api/errors/481df3219fd92d26. Report an issue: GitHub.