[MNG-2237] Inherited plugin executed twice if child pom merges configuration

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Duplicate
• Affects Version/s: 2.0.4
• Component/s: Inheritance and Interpolation
• Assignee: Carlos Sanchez Gonzalez
• Reporter: Joerg Schaible
• Created: 24/Apr/06 05:29
• Updated: 05/Apr/15 22:13
• Resolved: 08/Jun/06 08:48

Description

According the docs the configuration of a plugin is merged, when the plugin is inherited. This actually hapens, but the plugin with the merged configuration is added twice in the effective-pom and therefore executed twice.

Setup a parent pom with a plugin configuration to attach the javadocs:

            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-javadoc-plugin</artifactId>
                <executions>
                    <execution>
                        <id>attach-javadocs</id>
                        <goals>
                            <goal>jar</goal>
                        </goals>
                    </execution>
                </executions>
                <inherited>true</inherited>
                <configuration>
                    <linksource>true</linksource>
                </configuration>
            </plugin>

and a child pom that adds additional elements in the configuration:

           <plugin>
                <artifactId>maven-javadoc-plugin</artifactId>
                <configuration>
                    <links>
                        <link>http://java.sun.com/j2se/1.4.2/docs/api/</link>
                        <link>http://jakarta.apache.org/commons/logging/commons-logging-1.0.4/docs/apidocs/</link>
                        <link>http://jmock.codehaus.org/docs/javadoc/</link>
                        <link>http://www.junit.org/junit/javadoc/3.8.1/</link>
                    </links>
                </configuration>
            </plugin>

In this case the javadoc is generated twice, the goal help:effective-pom reveals, that the plugin was merged, but added twice.

Issue Links

• duplicates: MNG-2221 Multiple Executions of Plugin at Difference Inhertiance levels causes plugin executions to run multiple times
• duplicates: MNG-4879 CLONE -Multiple Executions of Plugin at Difference Inhertiance levels causes plugin executions to run multiple times
• is duplicated by: MANTRUN-57 merge issue from parent causing executions to be run multiple times
• is duplicated by: MNG-2297 plugin definitions not merged correctly
• relates to: MNG-2054 Multiple Inheritence causes plugin executions to run multiple times (Test Case Attached)