apache/maven · error · MavenException

Unable to parse xml: {} {}

Error message

Unable to parse xml: {}
{}

What it means

Error "Unable to parse xml: {} {}" thrown in apache/maven.

Source

Thrown at impl/maven-testing/src/main/java/org/apache/maven/testing/plugin/MojoExtension.java:291

                    .findFirst()
                    .map(ConfigurationContainer::getConfiguration)
                    .orElseGet(() -> XmlNode.newInstance("config"));
            List<XmlNode> children = mojoParameters.stream()
                    .map(mp -> {
                        String value = mp.value();
                        if (!mp.xml()) {
                            // Treat as plain text - escape XML special characters
                            value = value.replace("&", "&amp;")
                                    .replace("<", "&lt;")
                                    .replace(">", "&gt;")
                                    .replace("\"", "&quot;")
                                    .replace("'", "&apos;");
                        }
                        String s = '<' + mp.name() + '>' + value + "</" + mp.name() + '>';
                        try {
                            return XmlService.read(new StringReader(s));
                        } catch (XMLStreamException e) {
                            throw new MavenException("Unable to parse xml: " + e + System.lineSeparator() + s, e);
                        }
                    })
                    .collect(Collectors.toList());
            XmlNode config = XmlNode.newInstance("configuration", null, null, children, null);
            pluginConfiguration = XmlService.merge(config, pluginConfiguration);

            // load default config
            // pluginkey = groupId : artifactId : version : goal
            Mojo mojo = lookup(Mojo.class, coord[0] + ":" + coord[1] + ":" + coord[2] + ":" + coord[3]);
            for (MojoDescriptor mojoDescriptor : descriptor.getMojos()) {
                if (Objects.equals(mojoDescriptor.getGoal(), coord[3])) {
                    if (pluginConfiguration != null) {
                        pluginConfiguration = finalizeConfig(pluginConfiguration, mojoDescriptor);
                    }
                }
            }

            Session session = getInjector().getInstance(Session.class);

View on GitHub (pinned to e4093d4e12)

When it happens

Trigger: Thrown at impl/maven-testing/src/main/java/org/apache/maven/testing/plugin/MojoExtension.java:291 when the library encounters an invalid state.

Common situations: See trigger scenarios.

Understand the failure class

• Parsing and encoding errors: unexpected token, malformed input — why parsers reject input and how to find the real culprit.

AI-assisted analysis of apache/maven@e4093d4e12 (2026-08-21). Data as JSON: /api/errors/239dc90659058af8. Report an issue: GitHub.