<pluginManagement> <plugins> <plugin> <groupId>org.apache.tomcat.maven</groupId> <artifactId>tomcat6-maven-plugin</artifactId> <version>2.1</version> </plugin> <plugin> <groupId>org.apache.tomcat.maven</groupId> <artifactId>tomcat7-maven-plugin</artifactId> <version>2.1</version> </plugin> </plugins> </pluginManagement>Or add the groupId in your settings.xml
<pluginGroups> .... <pluginGroup>org.apache.tomcat.maven</pluginGroup> .... </pluginGroups>