Скачать или смотреть Fixing the SonarQube Scanner Code Coverage Report Issue with JaCoCo in Jenkins

Learn how to solve the SonarQube Scanner Code Coverage report issue using JaCoCo in Jenkins. This guide provides step-by-step instructions to ensure your reports are generated correctly.
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Troubleshooting SonarQube Scanner Code Coverage Reports with JaCoCo in Jenkins

When using SonarQube for your continuous integration and code quality assessments, integrating code coverage reports can often become a challenge. A common issue arises when running the SonarQube Scanner along with the JaCoCo code coverage tool in Jenkins. Many developers encounter problems related to not being able to import the JaCoCo XML report. This guide walks you through this particular issue, describes its symptoms, and provides solutions to get your code coverage metrics working seamlessly for your projects.

The Problem: JaCoCo XML Report Import Fails

In many situations, when developers invoke the Ant Task from Jenkins to generate the JaCoCo XML report, they may encounter an error similar to the following in the Jenkins logs:

[[See Video to Reveal this Text or Code Snippet]]

The main takeaway from this error message is that while the jacoco.xml file is generated, it cannot be read correctly, perhaps due to its format. For developers who value code quality and metrics, this can be frustrating, as it prevents visibility into code coverage.

Analyzing the Cause

Upon investigation, one crucial point arises: the content inside the jacoco.xml file is not being formatted as valid XML. This is often a direct result of not specifying the correct parameters during the report generation using Ant.

Key Symptoms of the Issue:

The jacoco.xml file is present in the specified path.

Attempting to import this file into SonarQube fails due to an XML parsing error.

HTML reports generated by JaCoCo may display correctly, leading to confusion since the other reports are created successfully.

The Solution: Correct XML Report Generation

To resolve this problem, all you need to do is ensure that your JaCoCo report is generated in the correct XML format. You have to add an additional property to your Ant task, which will tell JaCoCo to generate the XML report correctly.

Steps to Fix the Problem

Modify Your Ant Task: Add the following line to your Ant script where you are generating the report:

[[See Video to Reveal this Text or Code Snippet]]

This line ensures that JaCoCo generates a properly formatted XML report at the specified path.

Run the Build: After modifying the Ant script, re-trigger your Jenkins build. Pay attention to the logs to confirm that the XML report is generated without any errors.

Check SonarQube: Once the build is complete, navigate to your SonarQube dashboard to verify that the code coverage data is now visible and being reflected correctly.

Validation

After implementing this change, it's essential to validate the following:

The jacoco.xml file should be located at the specified path.

The XML file must be well-formed and can be opened in a text editor without error.

The coverage values should now display correctly in SonarQube, allowing you to derive actionable insights from your test coverage.

Conclusion

Addressing the issue of code coverage reporting using JaCoCo in Jenkins does not have to be complicated. By ensuring that the JaCoCo XML report is generated correctly, you can have a smooth workflow for integrating code coverage metrics into your SonarQube reports. Remember to modify your Ant task accordingly, and you'll find that your code coverage data and visibility into code quality will greatly improve.

This straightforward approach not only remedies immediate issues but enhances your development experience, ultimately leading to better code quality practices in your software projects.