Maven JaCoCo plugin not compatible with Surefire plugin with fork options

[justin...@yahoo.com]

Hi,

Below is a simple pom.xml that demonstrates that the Maven JaCoCo plugin is not compatible with the Surefire plugin when the surefire forkMode (or forkCount / reuseFork) flags are used.

This is a problem for us because our unit tests are running out of PermGen and changing the fork mode can solve this problem for us, but then Sonar doesn't work because of this incompatibility.

We always get the error message:

[ERROR] Execution default-test of goal org.apache.maven.plugins:maven-surefire-plugin:2.15:test failed: java.lang.Error: Unable to access JaCoCo Agent - make sure that you use JaCoCo and version not lower than 0.6.2.; nested exception is java.lang.Error: Unable to access JaCoCo Agent - make sure that you use JaCoCo and version not lower than 0.6.2. org/jacoco/agent/rt/RT: org.jacoco.agent.rt.RT -> [Help 1]

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.xxxxx</groupId>
<artifactId>xxxxx</artifactId>
<version>1.0.0</version>

<properties>
<buildType>Placeholder</buildType>
<isRelease>true</isRelease>

<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<sonar.language>java</sonar.language>
<!-- Tells Sonar to run the unit tests -->
<sonar.dynamicAnalysis>true</sonar.dynamicAnalysis>
<!-- Tells Sonar to use JaCoCo as the code coverage tool -->
<sonar.java.coveragePlugin>jacoco</sonar.java.coveragePlugin>
</properties>

<build>
<plugins>

<!-- junit plugin config -->
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-surefire-plugin</artifactId>
<version>2.15</version>
<configuration>
<forkMode>always</forkMode>
<!--<argLine>-XX:MaxPermSize=1024m ${argLine}</argLine>-->
<properties>
<property>
<name>listener</name>
<value>org.sonar.java.jacoco.JUnitListener</value>
</property>
</properties>
</configuration>
</plugin>

<!-- for Sonar -->
<plugin>
<groupId>org.jacoco</groupId>
<artifactId>jacoco-maven-plugin</artifactId>
<version>0.6.3.201306030806</version>
<executions>
<execution>
<id>prepare-agent</id>
<goals>
<goal>prepare-agent</goal>
</goals>
</execution>
<execution>
<id>report</id>
<phase>prepare-package</phase>
<goals>
<goal>report</goal>
</goals>
</execution>
<execution>
<id>check</id>
<goals>
<goal>check</goal>
</goals>
</execution>
</executions>
</plugin>
</plugins>
</build>

<dependencies>
<dependency>
<groupId>org.codehaus.sonar-plugins.java</groupId>
<artifactId>sonar-jacoco-listeners</artifactId>
<version>1.2</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.11</version>
<scope>test</scope>
</dependency>
</dependencies>
</project>

[Marc Hoffmann]

Hi,

this looks like a SonarQube issue: "Unable to access JaCoCo Agent -
make sure that you use JaCoCo and version not lower than 0.6.2" is not a
JaCoCo error message.

Can you please report this issue at SonarQube?

Thanks,
-marc

[gurv...@gmail.com]

Hi,

I have the issue, but I don't get what would be the link with sonarqube ? This error happens only with surefire and jacoco and nothing sonar related...

[Marc R. Hoffmann]

Hi,

- what exactly do you want to do (POM)?
- what is the error message you see?

Best regards,
-marc

[Gurvan Le Dromaguet]

Hi Marc, and thanks for your attention :)

I am trying to find a configuration of my project where when I run "mvn test", I have test results and also the "jacoco.exec" report file generated.

To be honest, yes, after that, I will ask Sonarqube to integrate this report, but for now there is no Sonarqube in the process.

Extract of my pom.xml :

... 

    <dependencies> 

  ...

     <dependency>
      <groupId>org.codehaus.sonar-plugins.java</groupId>
      <artifactId>sonar-jacoco-listeners</artifactId>

      <version>2.2.1</version>

      <scope>test</scope>
    </dependency>
  </dependencies>

... 

<plugin>
        <artifactId>maven-surefire-plugin</artifactId>
        <version>2.17</version>
        <executions>
          <execution>
            <id>default-test</id>
            <phase>test</phase>
            <goals>
              <goal>test</goal>
            </goals>
            <configuration>
              <redirectTestOutputToFile>true</redirectTestOutputToFile>
              <reuseForks>false</reuseForks>
              <excludes>
                <exclude>**/com/mycom/xxx/test/jms/*</exclude>
              </excludes>
              <argLine>${jacoco.agent.ut.arg}</argLine>

              <properties>
                <property>
                  <name>listener</name>
                  <value>org.sonar.java.jacoco.JUnitListener</value>
                </property>
              </properties>
            </configuration>

          </execution>
        </executions>
        <configuration>
          <redirectTestOutputToFile>true</redirectTestOutputToFile>
          <reuseForks>false</reuseForks>
          <excludes>
            <exclude>**/com/mycom/etl/test/jms/*</exclude>
          </excludes>
          <argLine>${jacoco.agent.ut.arg}</argLine>

          <properties>
            <property>
              <name>listener</name>
              <value>org.sonar.java.jacoco.JUnitListener</value>
            </property>
          </properties>
        </configuration>
      </plugin>

      <plugin>
        <groupId>org.jacoco</groupId>
        <artifactId>jacoco-maven-plugin</artifactId>

        <version>0.7.1.201405082137</version>
        <executions>
          <execution>
            <id>prepare-ut-agent</id>
            <phase>process-test-classes</phase>

            <goals>
              <goal>prepare-agent</goal>
            </goals>

            <configuration>
              <destFile>/home/xxx/dev/src/kernel/04.02/fflayer/target/jacoco.exec</destFile>
              <propertyName>jacoco.agent.ut.arg</propertyName>
              <append>true</append>
            </configuration>
          </execution>
          <execution>
            <id>prepare-it-agent</id>
            <phase>pre-integration-test</phase>

            <goals>
              <goal>prepare-agent</goal>
            </goals>

            <configuration>
              <destFile>/home/xxx/dev/src/kernel/04.02/fflayer/target/jacoco-it.exec</destFile>
              <propertyName>jacoco.agent.it.arg</propertyName>
              <append>true</append>
            </configuration>
          </execution>
        </executions>
      </plugin>

Ends up with:

[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 33.973s
[INFO] Finished at: Mon Jun 23 14:45:37 CEST 2014
[INFO] Final Memory: 22M/146M
[INFO] ------------------------------------------------------------------------
[ERROR] Failed to execute goal org.apache.maven.plugins:maven-surefire-plugin:2.17:test (default-test) on project xxx: Execution default-test of goal org.apache.maven.plugins:maven-surefire-plugin:2.17:test failed: org.sonar.java.jacoco.JacocoController$JacocoControllerError: Unable to access JaCoCo Agent - make sure that you use JaCoCo and version not lower than 0.6.2. org/jacoco/agent/rt/RT: org.jacoco.agent.rt.RT -> [Help 1]

If I do the same, but deleting "reuseForks" option (ie getting back to default "true")

[INFO] --- jacoco-maven-plugin:0.7.1.201405082137:prepare-agent (prepare-ut-agent) @ fflayer ---
[INFO] jacoco.agent.ut.arg set to -javaagent:/home/xxx/.m2/repository/org/jacoco/org.jacoco.agent/0.7.1.201405082137/org.jacoco.agent-0.7.1.201405082137-runtime.jar=destfile=/home/gle_dromaguet/dev/src/kernel/04.02/fflayer/target/jacoco.exec,append=true
[INFO] 
[INFO] --- maven-surefire-plugin:2.17:test (default-test) @ fflayer ---
[INFO] Surefire report directory: /home/gle_dromaguet/dev/src/kernel/04.02/fflayer/target/surefire-reports
-------------------------------------------------------
 T E S T S
-------------------------------------------------------
Running dil.flatfile2.FlatFileSetNameProviderTest
Tests run: 1, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 0.122 sec - in dil.flatfile2.FlatFileSetNameProviderTest
Running dil.flatfile2.FlatFileMappingTimePeriodTest
Tests run: 4, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 0.247 sec - in dil.flatfile2.FlatFileMappingTimePeriodTest
...

The Build is failed in the end because some of my JUnit are failed when reusefork is set as true

but it looks like the coverage has been working correctly this time ad the file "target/jacoco.exec" exists.

Do you have any idea what's going wrong ?

Regards,

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[Marc R. Hoffmann]

Hi Gurvan,

look at your first dependency. The listener is provided by SonarSource. If you look at your stacktrace you will also see that the Exception comes from org.sonar.*

We do not maintain this listener here at JaCoCo. To get support for this you really need to check with the Sonar project. We cannot provide support for 3rd party integrations here.

Sorry,
-marc

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[Gurvan Le Dromaguet]

Ouch ... I have really been blind here. I see now this listener is not directly for coverage computation, but for SonarQube to have the code higlighted covered/not covered.

Thanks again. 

[Gurvan Le Dromaguet]

I confirm if I delete the use of this dependency, everything is ok.

[smileso...@gmail.com]

Hi ,
I want to integrate the coverage report(through external scripts not through JUNIT) generated by the Eclemma in Eclipse Tools(Coverage Tab) to be exported to the SonarCube. Do you have a write up to follow?

Regards
Pradeep