apache/maven · error · RuntimeException

Unknown variable: ${name}

Error message

Unknown variable: ${name}

What it means

Error "Unknown variable: ${name}" thrown in apache/maven.

Source

Thrown at impl/maven-impl/src/main/java/org/apache/maven/impl/model/profile/ConditionParser.java:365

    private Object parseVariableOrUnknownFunction() {
        current--; // Move back to the token we couldn't parse as a number
        String name = tokens.get(current);
        current++;

        // Check if it's followed by an opening parenthesis, indicating a function call
        if (current < tokens.size() && tokens.get(current).equals("(")) {
            // It's a function call, parse it as such
            List<Object> args = parseArgumentList();
            if (functions.containsKey(name)) {
                return functions.get(name).apply(args);
            } else {
                throw new RuntimeException("Unknown function: " + name);
            }
        } else {
            // It's a variable
            // Here you might want to handle variables differently
            // For now, we'll throw an exception
            throw new RuntimeException("Unknown variable: " + name);
        }
    }

    /**
     * Parses a list of arguments for a function call.
     *
     * @return a list of parsed arguments
     * @throws RuntimeException if there's a mismatch in parentheses
     */
    private List<Object> parseArgumentList() {
        List<Object> args = new ArrayList<>();
        current++; // Skip the opening parenthesis
        while (current < tokens.size() && !tokens.get(current).equals(")")) {
            args.add(parseLogicalOr());
            if (current < tokens.size() && tokens.get(current).equals(",")) {
                current++;
            }
        }

View on GitHub (pinned to e4093d4e12)

When it happens

Trigger: Thrown at impl/maven-impl/src/main/java/org/apache/maven/impl/model/profile/ConditionParser.java:365 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/321f4717931b0cb7. Report an issue: GitHub.