Sonar and Jacoco: No JaCoCo analysis of project coverage can be done since there are no class files

Question

I use Jacoco, Sonar, Maven to report unit test coverage, this is a springboot project and please see my project arch as below:

web
 |-src/test/java --unit test classes
 |-target/
 |-pom.xml
service
 |-pom.xml
pom.xml
target
 |-sonar
 |-jacoco.exec

My maven config in parent pom.xml:

<plugin>
                <groupId>org.jacoco</groupId>
                <artifactId>jacoco-maven-plugin</artifactId>
                <version>0.7.8</version>
                <configuration>
                    <destFile>${project.basedir}/../target/jacoco.exec</destFile>
                    <append>true</append>
                </configuration>
                <executions>
                    <execution>
                        <goals>
                            <goal>prepare-agent</goal>
                            <goal>report</goal>
                        </goals>
                    </execution>
                </executions>
            </plugin>

web/pom.xml:

<plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-surefire-plugin</artifactId>
                <version>3.0.0-M4</version>
                <configuration>
                    <skipTests>false</skipTests>
                    <redirectTestOutputToFile>true</redirectTestOutputToFile>
                    <testFailureIgnore>true</testFailureIgnore>
                    <argLine>${argLine}</argLine>
                </configuration>
                <dependencies>
                    <dependency>
                        <groupId>org.apache.maven.surefire</groupId>
                        <artifactId>surefire-junit4</artifactId>
                        <version>3.0.0-M4</version>
                    </dependency>
                </dependencies>
            </plugin>

Step 1: run mvn clean org.jacoco:jacoco-maven-plugin:0.7.8:prepare-agent package -Dmaven.test.failure.ignore=true -q

file jacoco.exec was generated in folder target/jacoco.exec

Step 2: run below cmd:

mvn sonar:sonar -Dsonar.projectKey="projectName" -Dsonar.login={key} -Dsonar.host.url=http://ip:port -Dsonar.jdbc.url=jdbc:postgresql://ip:port/sonar -Dsonar.java.binaries=target/sonar

sonar folder was generated

sonar
 |-.sonar_lock
 |-projectName.pdf
 |-report-task.txt

I checked projectName.pdf,sonar analysis was there but test coverage was 0, only unit test count is correct, then i open Sonarqube find test coverage also 0.

Finally, i checked sonar log and found below log: No Jacoco...

mvn sonar:sonar log:

[INFO] Sensor JaCoCoSensor [java]
[WARNING] Property 'sonar.jacoco.reportPaths' is deprecated (JaCoCo binary format). 'sonar.coverage.jacoco.xmlReportPaths' should be used instead (JaCoCo XML format).
[INFO] No JaCoCo analysis of project coverage can be done since there are no class files.
[INFO] Sensor JaCoCoSensor [java] (done) | time=1ms
[INFO] Sensor JavaXmlSensor [java]

Question:

Why sonar couldn't find Jacoco class files, does it find jacoco.exec or other file.
How to genetate unit test coverage in Sonar.

Thanks!

sonar.jacoco.reportPaths should refer to classes that code compiled, so i copied classes from web/target/classes to target/classes, then updatesonar.jacoco.reportPaths=target/classes, rerun mvn sonar:sonar..., it can find jacoco.exec and code coverage in sonarqube is correct, will check how to run it without copy classes from web/target/classes. — Rollsbean

Rollsbean Rollsbean · Accepted Answer · 2020-10-27T12:31:47

After checked, i resolved this issue.

The key to solve this issue is sonar parameter sonar.java.binaries, this parameter is required and should set the path where your byte code generated, see sonarqube doc: https://docs.sonarqube.org/latest/analysis/languages/java/

sonar.java.binaries (required):

Comma-separated paths to directories containing the compiled bytecode files corresponding to your source files.

So what should i do is to update mvn sonar:sonar's params, change

-Dsonar.java.binaries=target/sonar

to Dsonar.java.binaries=target , target/sonar doesn't have classes but in target there are classes.

After doing that jacoco analysis will run and the output is that:

[INFO] Sensor JaCoCoSensor [java]
[WARNING] Property 'sonar.jacoco.reportPaths' is deprecated (JaCoCo binary format). 'sonar.coverage.jacoco.xmlReportPaths' should be used instead (JaCoCo XML format).
[INFO] Analysing /Users/rollsbean/workRepo/my-project/common/../target/jacoco.exec
[INFO] Sensor JaCoCoSensor [java] (done) | time=56ms
[INFO] Sensor JavaXmlSensor [java]
[INFO] 1 source files to be analyzed
[INFO] Sensor JavaXmlSensor [java] (done) | time=7ms
...
[INFO] Sensor JaCoCoSensor [java]
[WARNING] Property 'sonar.jacoco.reportPaths' is deprecated (JaCoCo binary format). 'sonar.coverage.jacoco.xmlReportPaths' should be used instead (JaCoCo XML format).
[INFO] Analysing /Users/rollsbean/workRepo/my-project/web/../target/jacoco.exec
[INFO] Sensor JaCoCoSensor [java] (done) | time=245ms
[INFO] Sensor JavaXmlSensor [java]
[INFO] 1 source files to be analyzed
[INFO] 1/1 source files have been analyzed
[INFO] Sensor JavaXmlSensor [java] (done) | time=206ms
...

That's all, hope it will help you.

Sonar and Jacoco: No JaCoCo analysis of project coverage can be done since there are no class files

1 Answers