diff --git a/its/core-it-suite/src/test/java/org/apache/maven/it/IntegrationTestSuite.java b/its/core-it-suite/src/test/java/org/apache/maven/it/IntegrationTestSuite.java
index 39b4d9d1c8..c108811451 100644
--- a/its/core-it-suite/src/test/java/org/apache/maven/it/IntegrationTestSuite.java
+++ b/its/core-it-suite/src/test/java/org/apache/maven/it/IntegrationTestSuite.java
@@ -98,6 +98,7 @@ public class IntegrationTestSuite
suite.addTestSuite( MavenITmng4629NoPomValidationErrorUponMissingSystemDepTest.class );
suite.addTestSuite( MavenITmng4625SettingsXmlInterpolationWithXmlMarkupTest.class );
suite.addTestSuite( MavenITmng4618AggregatorBuiltAfterModulesTest.class );
+ suite.addTestSuite( MavenITmng4615ValidateRequiredPluginParameterTest.class );
suite.addTestSuite( MavenITmng4600DependencyOptionalFlagManagementTest.class );
suite.addTestSuite( MavenITmng4590ImportedPomUsesSystemPropertiesTest.class );
suite.addTestSuite( MavenITmng4586PluginPrefixResolutionFromVersionlessPluginMngtTest.class );
diff --git a/its/core-it-suite/src/test/java/org/apache/maven/it/MavenITmng4615ValidateRequiredPluginParameterTest.java b/its/core-it-suite/src/test/java/org/apache/maven/it/MavenITmng4615ValidateRequiredPluginParameterTest.java
new file mode 100644
index 0000000000..e264ef9665
--- /dev/null
+++ b/its/core-it-suite/src/test/java/org/apache/maven/it/MavenITmng4615ValidateRequiredPluginParameterTest.java
@@ -0,0 +1,86 @@
+package org.apache.maven.it;
+
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied. See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+import org.apache.maven.it.Verifier;
+import org.apache.maven.it.util.ResourceExtractor;
+
+import java.io.File;
+import java.util.Properties;
+
+/**
+ * This is a test set for MNG-4615.
+ *
+ * @author Benjamin Bentmann
+ */
+public class MavenITmng4615ValidateRequiredPluginParameterTest
+ extends AbstractMavenIntegrationTestCase
+{
+
+ public MavenITmng4615ValidateRequiredPluginParameterTest()
+ {
+ super( "[2.0.3,3.0-alpha-1),[3.0-beta-2,)" );
+ }
+
+ /**
+ * Verify that Maven validates required mojo parameters (and doesn't just have the plugins die with NPEs).
+ */
+ public void testit()
+ throws Exception
+ {
+ File testDir = ResourceExtractor.simpleExtractResources( getClass(), "/mng-4615" );
+
+ Verifier verifier = newVerifier( testDir.getAbsolutePath() );
+ verifier.setAutoclean( false );
+ verifier.deleteDirectory( "target" );
+ try
+ {
+ verifier.executeGoal( "validate" );
+ verifier.verifyErrorFreeLog();
+ fail( "Build did not fail despite required plugin parameter missing" );
+ }
+ catch ( VerificationException e )
+ {
+ // expected
+ }
+
+ // sanity check that adding the param makes it work
+
+ verifier.setLogFileName( "log-2.txt" );
+ verifier.getCliOptions().add( "-Pmng4615" );
+ verifier.deleteDirectory( "target" );
+ verifier.executeGoal( "validate" );
+ verifier.verifyErrorFreeLog();
+ Properties props = verifier.loadProperties( "target/config.properties" );
+ assertEquals( "PROFILE", props.get( "requiredParam" ) );
+
+ verifier.setLogFileName( "log-3.txt" );
+ verifier.getCliOptions().remove( "-Pmng4615" );
+ verifier.setSystemProperty( "config.requiredParam", "CLI" );
+ verifier.deleteDirectory( "target" );
+ verifier.executeGoal( "validate" );
+ verifier.verifyErrorFreeLog();
+ props = verifier.loadProperties( "target/config.properties" );
+ assertEquals( "CLI", props.get( "requiredParam" ) );
+
+ verifier.resetStreams();
+ }
+
+}
diff --git a/its/core-it-suite/src/test/resources/mng-4615/pom.xml b/its/core-it-suite/src/test/resources/mng-4615/pom.xml
new file mode 100644
index 0000000000..d551708182
--- /dev/null
+++ b/its/core-it-suite/src/test/resources/mng-4615/pom.xml
@@ -0,0 +1,73 @@
+
+
+
+
+
+ 4.0.0
+
+ org.apache.maven.its.mng4615
+ test
+ 0.1
+ jar
+
+ Maven Integration Test :: MNG-4615
+
+ Verify that Maven validates required mojo parameters (and doesn't just have the plugins die with NPEs).
+
+
+
+
+
+ org.apache.maven.its.plugins
+ maven-it-plugin-configuration
+ 2.1-SNAPSHOT
+
+ target/config.properties
+
+
+
+ test
+ validate
+
+ required-config
+
+
+
+
+
+
+
+
+
+ mng4615
+
+
+
+ org.apache.maven.its.plugins
+ maven-it-plugin-configuration
+
+ PROFILE
+
+
+
+
+
+
+
diff --git a/its/core-it-support/core-it-plugins/maven-it-plugin-configuration/src/main/java/org/apache/maven/plugin/coreit/RequiredConfigMojo.java b/its/core-it-support/core-it-plugins/maven-it-plugin-configuration/src/main/java/org/apache/maven/plugin/coreit/RequiredConfigMojo.java
new file mode 100644
index 0000000000..ac0736d600
--- /dev/null
+++ b/its/core-it-support/core-it-plugins/maven-it-plugin-configuration/src/main/java/org/apache/maven/plugin/coreit/RequiredConfigMojo.java
@@ -0,0 +1,113 @@
+package org.apache.maven.plugin.coreit;
+
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied. See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+import java.io.File;
+import java.util.Properties;
+
+import org.apache.maven.plugin.AbstractMojo;
+import org.apache.maven.plugin.MojoExecutionException;
+
+/**
+ * Dumps this mojo's configuration into a properties file.
+ *
+ * @goal required-config
+ * @phase validate
+ *
+ * @author Benjamin Bentmann
+ */
+public class RequiredConfigMojo
+ extends AbstractMojo
+{
+
+ /**
+ * The current project's base directory, used for path alignment.
+ *
+ * @parameter default-value="${basedir}"
+ * @readonly
+ */
+ private File basedir;
+
+ /**
+ * The path to the properties file into which to save the mojo configuration.
+ *
+ * @parameter expression="${config.propertiesFile}"
+ */
+ private File propertiesFile;
+
+ /**
+ * A required parameter.
+ *
+ * @parameter expression="${config.requiredParam}"
+ * @required
+ */
+ private String requiredParam;
+
+ /**
+ * A required parameter that is actually backed by default value from the POM.
+ *
+ * @parameter default-value="${project.artifactId}"
+ * @required
+ */
+ private String requiredParamWithDefault;
+
+ /**
+ * Runs this mojo.
+ *
+ * @throws MojoExecutionException If the output file could not be created.
+ */
+ public void execute()
+ throws MojoExecutionException
+ {
+ getLog().info( "[MAVEN-CORE-IT-LOG] Using output file path: " + propertiesFile );
+
+ if ( propertiesFile == null )
+ {
+ throw new MojoExecutionException( "Path name for output file has not been specified" );
+ }
+
+ if ( !propertiesFile.isAbsolute() )
+ {
+ propertiesFile = new File( basedir, propertiesFile.getPath() ).getAbsoluteFile();
+ }
+
+ Properties configProps = new Properties();
+
+ dumpConfiguration( configProps );
+
+ getLog().info( "[MAVEN-CORE-IT-LOG] Creating output file: " + propertiesFile );
+
+ PropertiesUtil.write( propertiesFile, configProps );
+
+ getLog().info( "[MAVEN-CORE-IT-LOG] Created output file: " + propertiesFile );
+ }
+
+ /**
+ * Dumps the mojo configuration into the specified properties.
+ *
+ * @param props The properties to dump the configuration into, must not be null.
+ */
+ private void dumpConfiguration( Properties props )
+ {
+ PropertiesUtil.serialize( props, "requiredParam", requiredParam );
+ PropertiesUtil.serialize( props, "requiredParamWithDefault", requiredParamWithDefault );
+ }
+
+}