Trouble configuring JaCoCo in maven

Question

I am trying to do a simple JaCoCo report through Maven and I keep getting the same error. Here is a snippet of my plugin.

<plugin>
    <groupId>org.jacoco</groupId>
    <artifactId>jacoco-maven-plugin</artifactId>
    <version>0.7.2.201409121644</version>
    <executions>
        <execution>
            <id>jacoco-check</id>
            <goals>
                <goal>check</goal>
            </goals>
            <configuration>
                <rules>
                    <rule>
                        <element>PACKAGE</element>
                        <limits>
                            <limit>
                                <counter>LINE</counter>
                                <value>COVEREDRATIO</value>
                                <minimum>0.01</minimum>
                            </limit>
                        </limits>
                    </rule>
                </rules>
            </configuration>
        </execution>
    </executions>
</plugin>

When I run mvn clean install jacoco:check I get the following

Failed to execute goal org.jacoco:jacoco-maven-plugin:0.7.2.201409121644:check (default-cli) on project ###########: The parameters 'rules' for goal org.jacoco:jacoco-maven-plugin:0.7.2.201409121644:check are missing or invalid -> [Help 1]

I've tried changing the version from 0.6.3 to 0.7.2 and every version in between. As far as I can tell this looks like valid config for any of those versions above 0.6.3 and was even originally taken from their own examples found at the below link (I just removed everything but the check goal):

http://www.eclemma.org/jacoco/trunk/doc/maven.html

If I run with the -X option I get the following stack trace:

org.apache.maven.lifecycle.LifecycleExecutionException: Failed to execute goal org.jacoco:jacoco-maven-plugin:0.7.2.201409121644:check (default-cli) on project science-open: The parameters 'rules' for goal org.jacoco:jacoco-maven-plugin:0.7.2.201409121644:check are missing or invalid
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:220)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:153)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:145)
    at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:108)
    at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:76)
    at org.apache.maven.lifecycle.internal.builder.singlethreaded.SingleThreadedBuilder.build(SingleThreadedBuilder.java:51)
    at org.apache.maven.lifecycle.internal.LifecycleStarter.execute(LifecycleStarter.java:116)
    at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:361)
    at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:155)
    at org.apache.maven.cli.MavenCli.execute(MavenCli.java:584)
    at org.apache.maven.cli.MavenCli.doMain(MavenCli.java:213)
    at org.apache.maven.cli.MavenCli.main(MavenCli.java:157)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
    at java.lang.reflect.Method.invoke(Method.java:597)
    at org.codehaus.plexus.classworlds.launcher.Launcher.launchEnhanced(Launcher.java:289)
    at org.codehaus.plexus.classworlds.launcher.Launcher.launch(Launcher.java:229)
    at org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode(Launcher.java:415)
    at org.codehaus.plexus.classworlds.launcher.Launcher.main(Launcher.java:356)
    at org.codehaus.classworlds.Launcher.main(Launcher.java:46)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
    at java.lang.reflect.Method.invoke(Method.java:597)
    at com.intellij.rt.execution.application.AppMain.main(AppMain.java:134)
Caused by: org.apache.maven.plugin.PluginParameterException: The parameters 'rules' for goal org.jacoco:jacoco-maven-plugin:0.7.2.201409121644:check are missing or invalid
    at org.apache.maven.plugin.internal.DefaultMavenPluginManager.populatePluginFields(DefaultMavenPluginManager.java:584)
    at org.apache.maven.plugin.internal.DefaultMavenPluginManager.getConfiguredMojo(DefaultMavenPluginManager.java:537)
    at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo(DefaultBuildPluginManager.java:120)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:208)
    ... 25 more

What am i doing wrong?

Answer 1

This is because you launch maven with the explicit goal:

mvn ... jacoco:check

Running like this, the <configuration> section inside <execution> is not read; to make it work, use the default maven phase to which the jacoco:check goal is bound, which is verify

mvn clean verify

Or, alternatively, (but I cannot try this myself right now and I am not 100% sure), try using a default- prefix in the executions ids, like:

   <execution>
        <id>default-jacoco-check</id>
        <goals>
            <goal>check</goal>
        </goals>
        [...]
   </execution>