sonar, jacoco, and maven are not cooperating for me - maven-3

Question

Maven 3.0.4
sonar-maven-plugin 2.2
jacoco-maven-plugin 0.6.4.201312101107
When I run mvn sonar:sonar, the prepare-agent goal of the jacoco-maven-plugin fails to run, so the agent arguments aren't there for surefire when needed.
When I explicitly run mvn prepare-package sonar:sonar, I get an infinite recursion in jacoco initialization.
Apparently I'm missing something, but what?
<plugin>
<groupId>org.jacoco</groupId>
<artifactId>jacoco-maven-plugin</artifactId>
<executions>
<!--
Prepares the property pointing to the JaCoCo runtime agent which
is passed as VM argument when Maven the Surefire plugin is executed.
-->
<execution>
<id>default-prepare-agent</id>
<goals>
<goal>prepare-agent</goal>
</goals>
<configuration>
<propertyName>jaCoCoSurefireArgLine</propertyName>
</configuration>
</execution>
<execution>
<id>default-report</id>
<phase>prepare-package</phase>
<goals>
<goal>report</goal>
</goals>
</execution>
</executions>
</plugin>

Answer 1

You have to configure plenty things to make jacoco works. Check that configuration:
<plugin>
<groupId>org.jacoco</groupId>
<artifactId>jacoco-maven-plugin</artifactId>
<version>0.6.2.201302030002</version>
<executions>
<!-- prepare agent for measuring unit tests -->
<execution>
<id>prepare-unit-tests</id>
<goals>
<goal>prepare-agent</goal>
</goals>
<configuration>
<destFile>${sonar.jacoco.reportPath}</destFile>
</configuration>
</execution>
</executions>
</plugin>
Also you can refer to my blog post dealing with multimodule projects with unit and integration tests: http://www.kubrynski.com/2013/03/measuring-overall-code-coverage-in.html