MojoDescriptor mojoDescriptor = mojoExecution.getMojoDescriptor();

        XmlNode executionConfiguration = mojoExecution.getConfiguration() != null
                ? mojoExecution.getConfiguration().getDom()
                : null;
        if (executionConfiguration == null) {
            executionConfiguration = XmlNode.newInstance("configuration");
        }

        if (sourceDominant) {
            merged.putAll(target.getConfiguration());
            merged.putAll(source.getConfiguration());
        } else {
            merged.putAll(source.getConfiguration());
            merged.putAll(target.getConfiguration());
        }
        target.setConfiguration(merged);
    }

    protected void mergeNotifier_SendOnError(

            Xpp3Dom config0 = (Xpp3Dom) jdks.getToolchains().get(0).getConfiguration();
            assertEquals("lib/tools.jar", config0.getChild("toolsJar").getValue());
            assertEquals(2, config0.getChildCount());
            Xpp3Dom config1 = (Xpp3Dom) jdks.getToolchains().get(1).getConfiguration();
            assertEquals(2, config1.getChildCount());

  run a reactorized project...the successive calls may leave behind configuration
  artifacts from invocation to invocation.

Maven Modifications

* DefaultPluginManager

  s/getMojoConfiguration()/getConfiguration()/g

  That should re-enable usage of mojo configuration. Ideally, we won't need any
  of the code that references this method, since the container should provide

                                .configuration(phase.getConfiguration())
                                .executions(phase.getExecutions().stream()
                                        .map(exec -> org.apache.maven.api.model.PluginExecution.newBuilder()
                                                .goals(exec.getGoals())
                                                .configuration(exec.getConfiguration())

                break;
            }
        }

        assertNotNull(plugin);

        assertEquals("1.0", plugin.getVersion());

        XmlNode configuration = plugin.getDelegate().getConfiguration();

        assertEquals(
                "src/conf/plexus.conf",
                configuration.child("plexusConfiguration").value());

        assertEquals(
                "src/conf/plexus.properties",

    }

    @Override
    public String getGoal() {
        return delegate.getGoal();
    }

    @Override
    public Optional<XmlNode> getConfiguration() {
        return Optional.of(delegate.getConfiguration()).map(Xpp3Dom::getDom);
    }

    @Override
    public String toString() {
        return delegate.toString();
    }

    @Nonnull
    String getExecutionId();

    @Nonnull
    String getGoal();

    @Nonnull
    String getLifecyclePhase();

    @Nonnull
    Optional<XmlNode> getConfiguration();

        this.plugin = plugin;
    }

    @Override
    public void configure(Binder binder) {
        if (plugin.getKey() != null) {
            XmlNode configuration = plugin.getConfiguration();
            if (configuration == null) {
                configuration = XmlNode.newInstance("configuration");
            }
            binder.bind(XmlNode.class)

 *
 * @since 3.1.0
 */
public class Slf4jConfigurationFactory {
    public static final String RESOURCE = "META-INF/maven/slf4j-configuration.properties";

    public static Slf4jConfiguration getConfiguration(ILoggerFactory loggerFactory) {
        String slf4jBinding = loggerFactory.getClass().getCanonicalName();

        try {
            Enumeration<URL> resources =