Jacoco Maven Plugin - Plugin execution not covered by lifecycle configuration

Question

I'm new to Maven and want to use the Jacoco Maven Plugin to build my projects.

I've set up an example project with TestNG the only dependency.

Here is part of the pom.xml:

<dependencies>
    <dependency>
        <groupId>org.testng</groupId>
        <artifactId>testng</artifactId>
        <version>6.8</version>
    </dependency>
</dependencies>
<build>
    <plugins>
        <plugin>
            <groupId>org.jacoco</groupId>
            <artifactId>jacoco-maven-plugin</artifactId>
            <version>0.6.2.201302030002</version>
            <executions>
                <execution>
                    <goals>
                        <goal>prepare-agent</goal>
                    </goals>
                </execution>
                <execution>
                    <id>report</id>
                    <phase>prepare-package</phase>
                    <goals>
                        <goal>report</goal>
                    </goals>
                </execution>
            </executions>
        </plugin>
    </plugins>
</build>

And i get this error:

Plugin execution not covered by lifecycle configuration: org.jacoco:jacoco-maven- plugin:0.6.2.201302030002:prepare-agent (execution: default, phase: initialize)

What am I doing wrong ? Cheers

Answer 1

You can ignore the plugin goal, adding something like this to your pom.xml

<pluginManagement>
        <plugins>
            <!--This plugin's configuration is used to store Eclipse m2e settings only.
                It has no influence on the Maven build itself.-->
            <plugin>
                <groupId>org.eclipse.m2e</groupId>
                <artifactId>lifecycle-mapping</artifactId>
                <version>1.0.0</version>
                <configuration>
                    <lifecycleMappingMetadata>
                        <pluginExecutions>
                            <pluginExecution>
                                <pluginExecutionFilter>
                                    <groupId>org.jacoco</groupId>
                                    <artifactId>jacoco-maven-plugin</artifactId>
                                    <versionRange>[0.5,)
                                    </versionRange>
                                    <goals>
                                        <goal>prepare-agent</goal>
                                    </goals>
                                </pluginExecutionFilter>
                                <action>
                                    <!-- m2e doesn't know what to do with jacoco,
                                        let's ignore it or annoying error markers appear
                                        see http://wiki.eclipse.org/M2E_plugin_execution_not_covered
                                     -->
                                    <ignore></ignore>
                                </action>
                            </pluginExecution>
                        </pluginExecutions>
                    </lifecycleMappingMetadata>
                </configuration>
            </plugin>
        </plugins>
    </pluginManagement>

Answer 2

As this is related to the Eclipse Maven plugin, alternatively this can be set locally in Eclipse's preferences. Moving the configuration out of the project's pom file helps the code simple and clean, free of IDE particulars.

Go to Eclipse --> Preferences --> Maven --> Lifecycle Mappings. Add lifecycle-mapping-metadata.xml as the following:

<?xml version="1.0" encoding="UTF-8"?>
<lifecycleMappingMetadata>
  <pluginExecutions>
    <pluginExecution>
      <pluginExecutionFilter>
        <groupId>org.jacoco</groupId>
        <artifactId>jacoco-maven-plugin</artifactId>
        <versionRange>[0.5,)</versionRange>
        <goals>
          <goal>prepare-agent</goal>
        </goals>
      </pluginExecutionFilter>
      <action>
        <ignore />
      </action>
    </pluginExecution>
  </pluginExecutions>
</lifecycleMappingMetadata>

Reload the life-cycle mappings file and then Maven --> Update Project