SonarQube not picking up Unit Test Coverage

Jenkins does not show coverage results as it is a problem of version compatibilities between jenkins jacoco plugin and maven jacoco plugin. On my side I have fixed it by using a more recent version of maven jacoco plugin

<build>
   <pluginManagement>
     <plugins>
       <plugin>
         <groupId>org.jacoco</groupId>
         <artifactId>jacoco-maven-plugin</artifactId>
         <version>0.7.9</version>
       </plugin>
     <plugins>
   <pluginManagement>
<build>

Based on https://github.com/SonarSource/sonar-examples/blob/master/projects/tycho/pom.xml, the following POM works for me:

<properties>
    <sonar.core.codeCoveragePlugin>jacoco</sonar.core.codeCoveragePlugin>
    <sonar.dynamicAnalysis>reuseReports</sonar.dynamicAnalysis>
    <sonar.jacoco.reportPath>${project.basedir}/../target/jacoco.exec</sonar.jacoco.reportPath>
</properties>
<build>
    <plugins>
        <plugin>
            <groupId>org.jacoco</groupId>
            <artifactId>jacoco-maven-plugin</artifactId>
            <version>0.7.0.201403182114</version>
            <executions>
                <execution>
                    <goals>
                        <goal>prepare-agent</goal>
                    </goals>
                </execution>
            </executions>
            <configuration>
                <destFile>${sonar.jacoco.reportPath}</destFile>
            </configuration>
        </plugin>
    </plugins>
</build>

• Setting the destination file to the report path ensures that Sonar reads exactly the file JaCoCo generates.
• The report path should be outside the projects' directories to take cross-project coverage into account (e.g. in case of Tycho where the convention is to have separate projects for tests).
• The reuseReports setting prevents the deletion of the JaCoCo report file before it is read! (Since 4.3, this is the default and is deprecated.)

Then I just run

mvn clean install
mvn sonar:sonar

You were missing a few important sonar properties, Here is a sample from one of my builds:

sonar.jdbc.dialect=mssql
sonar.projectKey=projectname
sonar.projectName=Project Name
sonar.projectVersion=1.0
sonar.sources=src
sonar.language=java
sonar.binaries=build/classes
sonar.tests=junit
sonar.dynamicAnalysis=reuseReports
sonar.junit.reportsPath=build/test-reports
sonar.java.coveragePlugin=jacoco
sonar.jacoco.reportPath=build/test-reports/jacoco.exec

The error in Jenkins console output can be pretty useful for getting code coverage to work.

Project coverage is set to 0% since there is no directories with classes.
Indicates that you have not set the Sonar.Binaries property correctly

No information about coverage per test
Indicates you have not set the Sonar.Tests property properly

Coverage information was not collected. Perhaps you forget to include debug information into compiled classes? Indicates that the sonar.binaries property was set correctly, but those files were not compiled in debug mode, and they need to be

I had the similar issue, 0.0% coverage & no unit tests count on Sonar dashboard with SonarQube 6.7.2: Maven : 3.5.2, Java : 1.8, Jacoco : Worked with 7.0/7.9/8.0, OS : Windows

After a lot of struggle finding for correct solution on maven multi-module project,not like single module project here we need to say to pick jacoco reports from individual modules & merge to one report,So resolved issue with this configuration as my parent pom looks like:

 <properties>
            <!--Sonar -->
            <sonar.java.coveragePlugin>jacoco</sonar.java.coveragePlugin>
            <sonar.dynamicAnalysis>reuseReports</sonar.dynamicAnalysis>
        <sonar.jacoco.reportPath>${project.basedir}/../target/jacoco.exec</sonar.jacoco.reportPath>
            <sonar.language>java</sonar.language>

        </properties>

        <build>
            <pluginManagement>
                <plugins>
                    <plugin>
                        <groupId>org.apache.maven.plugins</groupId>
                        <artifactId>maven-compiler-plugin</artifactId>
                        <configuration>
                            <source>1.5</source>
                            <target>1.5</target>
                        </configuration>
                    </plugin>

                    <plugin>
                        <groupId>org.sonarsource.scanner.maven</groupId>
                        <artifactId>sonar-maven-plugin</artifactId>
                        <version>3.4.0.905</version>
                    </plugin>

                    <plugin>
                        <groupId>org.jacoco</groupId>
                        <artifactId>jacoco-maven-plugin</artifactId>
                        <version>0.7.9</version>
                        <configuration>
                            <destFile>${sonar.jacoco.reportPath}</destFile>
                            <append>true</append>
                        </configuration>
                        <executions>
                            <execution>
                                <id>agent</id>
                                <goals>
                                    <goal>prepare-agent</goal>
                                </goals>
                            </execution>
                        </executions>
                    </plugin>

                </plugins>
            </pluginManagement>
        </build>

I've tried few other options like jacoco-aggregate & even creating a sub-module by including that in parent pom but nothing really worked & this is simple. I see in logs <sonar.jacoco.reportPath> is deprecated,but still works as is and seems like auto replaced on execution or can be manually updated to <sonar.jacoco.reportPaths> or latest. Once after doing setup in cmd start with mvn clean install then mvn org.jacoco:jacoco-maven-plugin:prepare-agent install (Check on project's target folder whether jacoco.exec is created) & then do mvn sonar:sonar , this is what I've tried please let me know if some other best possible solution available.Hope this helps!! If not please post your question..