apache/maven · error · ToolchainsBuildingException

{count} problem(s) were encountered while building the effec

Error message

{count} problem(s) were encountered while building the effective toolchains

What it means

Error "{count} problem(s) were encountered while building the effective toolchains" thrown in apache/maven.

Source

Thrown at compat/maven-toolchain-builder/src/main/java/org/apache/maven/toolchain/building/DefaultToolchainsBuilder.java:79

    @Inject
    private ToolchainsReader toolchainsReader;

    @Override
    public ToolchainsBuildingResult build(ToolchainsBuildingRequest request) throws ToolchainsBuildingException {
        ProblemCollector problems = ProblemCollectorFactory.newInstance(null);

        PersistedToolchains globalToolchains = readToolchains(request.getGlobalToolchainsSource(), request, problems);

        PersistedToolchains userToolchains = readToolchains(request.getUserToolchainsSource(), request, problems);

        toolchainsMerger.merge(userToolchains, globalToolchains, TrackableBase.GLOBAL_LEVEL);

        problems.setSource("");

        userToolchains = interpolate(userToolchains, problems);

        if (hasErrors(problems.getProblems())) {
            throw new ToolchainsBuildingException(problems.getProblems());
        }

        return new DefaultToolchainsBuildingResult(userToolchains, problems.getProblems());
    }

    private PersistedToolchains interpolate(PersistedToolchains toolchains, ProblemCollector problems) {

        StringWriter stringWriter = new StringWriter(1024 * 4);
        try {
            toolchainsWriter.write(stringWriter, null, toolchains);
        } catch (IOException e) {
            throw new IllegalStateException("Failed to serialize toolchains to memory", e);
        }

        String serializedToolchains = stringWriter.toString();

        RegexBasedInterpolator interpolator = new RegexBasedInterpolator();

View on GitHub (pinned to e4093d4e12)

When it happens

Trigger: Thrown at compat/maven-toolchain-builder/src/main/java/org/apache/maven/toolchain/building/DefaultToolchainsBuilder.java:79 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/96e9ccbe4f21371c. Report an issue: GitHub.