Hello, I have been trying to get Jacoco to work with the maven build, because we used sonarqube to as part of our process and we need code coverage metrics. However, no matter what I do, Jacoco is always analyzing zero classes.

Is there anything we can do for this?

asked 09.01 at 08:27

TareqK's gravatar image

accept rate: 25%


Seems to be an maven configuration problem to me... How do you configure you're maven build? Do you use the jacoco-maven-plugin? Did the tests run? Which JUnit version? Maybe this blog post can help you: https://www.mkyong.com/maven/maven-jacoco-code-coverage-example/

Kind regards


(09.01 at 08:39) Lukas Lieb ♦♦ Lukas%20Lieb's gravatar image

I Did indeed do the maven setup, im using maven 4.12 with powermock and mockito, and all the test do run. I checked this configuration compared to the examples on baeldug and mkyong, but still no luck. Jacoco does see all the packages, its just ignoring every class in them.

(09.01 at 09:01) TareqK TareqK's gravatar image

you may have to set explicitly the test releated vars in pom.xml: e.g.


if that doesn't help: the issue is very likely that jacoco works with a javaagent. Since we setup a custom JDT compiler run, this agent may can not be made known with a standard approach.

However, we can provide detailed feedback if you share a simple project that shows the issue and file it as official support request.

(10.01 at 05:22) Reguel Werme... ♦♦ Reguel%20Wermelinger's gravatar image

Updates on this :

Got it to work, turns out as @Reguel said, the JDT compiler wont play with a javaagent. I got around this by using the offline mode of jacoco, and copying the generated classes from the classes directory in the correct target/classes and target/test-classes directories . This is what the pom section looks like :

Gist Of pom.xml parts

You also need to set the <testoutputdirectory> as well, otherwise it wont work

The reports are generated in the target/site/jacoco folder, and the jacoco.exec file is in the target folder as well


answered 13.01 at 10:07

TareqK's gravatar image

accept rate: 25%

edited 13.01 at 10:08

Cool solution: thanks for sharing!

One remark though:

  • you can make the resource copy process slightly simpler by teaching ivy projects where to put compile classes into (our default /classes is not the best for maven natured projects)
  • use the package explorer > context menu > properties > java build path > source
  • set the settings outlined in the screenshot:

(13.01 at 10:18) Reguel Werme... ♦♦ Reguel%20Wermelinger's gravatar image

@Reguel Thanks for the feedback, ill try it out as soon as i can!

(13.01 at 10:29) TareqK TareqK's gravatar image
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Asked: 09.01 at 08:27

Seen: 393 times

Last updated: 13.01 at 10:29