apache/maven · error · DIException

No binding to construct an instance for key {}. Existing bi

Error message

No binding to construct an instance for key {}.  Existing bindings:
{}

What it means

Error "No binding to construct an instance for key {}. Existing bindings: {}" thrown in apache/maven.

Source

Thrown at impl/maven-di/src/main/java/org/apache/maven/di/impl/InjectorImpl.java:269

            if (k.getRawType() == String.class && res2 != null) {
                Map<String, Supplier<Object>> map = res2.stream()
                        .filter(b -> b.getOriginalKey() == null
                                || b.getOriginalKey().getQualifier() == null
                                || b.getOriginalKey().getQualifier() instanceof String)
                        .collect(Collectors.toMap(
                                b -> (String)
                                        (b.getOriginalKey() != null
                                                ? b.getOriginalKey().getQualifier()
                                                : null),
                                this::compile));
                //noinspection unchecked
                return () -> (Q) map(map, Supplier::get);
            }
        }
        if (dep.optional()) {
            return () -> null;
        }
        throw new DIException("No binding to construct an instance for key "
                + key.getDisplayString() + ".  Existing bindings:\n"
                + getBoundKeys().stream()
                        .map(Key::toString)
                        .map(String::trim)
                        .sorted()
                        .distinct()
                        .collect(Collectors.joining("\n - ", " - ", "")));
    }

    @SuppressWarnings("unchecked")
    protected <Q> Supplier<Q> compile(Binding<Q> binding) {
        Supplier<Q> compiled = binding.compile(this::getCompiledBinding);
        if (binding.getScope() != null) {
            Scope scope = scopes.entrySet().stream()
                    .filter(e -> e.getKey().isInstance(binding.getScope()))
                    .findFirst()
                    .map(Map.Entry::getValue)
                    .orElseThrow(() -> new DIException("Scope not bound for annotation "

View on GitHub (pinned to e4093d4e12)

When it happens

Trigger: Thrown at impl/maven-di/src/main/java/org/apache/maven/di/impl/InjectorImpl.java:269 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/1dc19aae4ce89779. Report an issue: GitHub.