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Welcome to the EclEmma and JaCoCo user's group!

To resolve issues quickly please check our extensive documentation first:

These links contain answers to most questions that have been asked before.

If you're posting new issues to this list please help us to understand your problem or idea:

Clearly state what you want to do and what the expected outcome is.
Provide detailed information about your exact setup and product versions in use.
In case you encounter an error include the full error message, stack trace or log file.

What will not work on this mailing list:

We cannot provide support for other tools JaCoCo has been integrated with. Please check with the respective tool providers.
We will not do your homework or assignment.
All support is provided by volunteers in their spare time for free. Adding URGENT, ASAP etc. to your requests is no motivation for them.

0 selected

Martin Paljak, Marc Hoffmann4

Nov 18

Visualizing exceptions

Hi Martin, some random remarks: 10+ years seems like a longstanding issue. No newer ideas? Maybe

unread,

Visualizing exceptions

Hi Martin, some random remarks: 10+ years seems like a longstanding issue. No newer ideas? Maybe

Nov 18

Martin Paljak, Marc Hoffmann3

Nov 17

Allowing bytecode-modified classes

Hello, I managed to get things working and also automated, with my currently Maven based setup,

unread,

Allowing bytecode-modified classes

Hello, I managed to get things working and also automated, with my currently Maven based setup,

Nov 17

Pierre-Charles David

Oct 14

Including external (e.g. library) code as part of the coverage

Hi, I'm trying to implement the following scenario, but I'm not sure if it is supported and

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Including external (e.g. library) code as part of the coverage

Hi, I'm trying to implement the following scenario, but I'm not sure if it is supported and

Oct 14

Wolfgang, … Evgeny Mandrikov4

Sep 29

How to build Jacoco? ("Validation Scala" project fails to build)

Thanks, I can confirm that it works now. Many thanks for the fast help! Best regards Wolfgang Evgeny

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How to build Jacoco? ("Validation Scala" project fails to build)

Thanks, I can confirm that it works now. Many thanks for the fast help! Best regards Wolfgang Evgeny

Sep 29

Digitek, Marc Hoffmann2

Sep 10

How to prevent JaCoCo from excluding methods annotated with Generated

Hi, that's a interesting situation. Unfortunately annotations are not configurable. Best regards,

unread,

How to prevent JaCoCo from excluding methods annotated with Generated

Hi, that's a interesting situation. Unfortunately annotations are not configurable. Best regards,

Sep 10

Zach Olbrys, Evgeny Mandrikov2

Jun 27

Kotlin 2.2.0 interface method generation changes

Hi, This case requires improvement on JaCoCo side - see https://github.com/jacoco/jacoco/issues/1905

unread,

Kotlin 2.2.0 interface method generation changes

Hi, This case requires improvement on JaCoCo side - see https://github.com/jacoco/jacoco/issues/1905

Jun 27

Jun 16

Recursive report aggregation in maven

I'm trying to generate an aggregate report for https://github.com/assertj/assertj which has the

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Recursive report aggregation in maven

I'm trying to generate an aggregate report for https://github.com/assertj/assertj which has the

Jun 16

maik....@googlemail.com, Marc Hoffmann2

Apr 29

coverage 0 with junit jupiter 5.12

Hi Mike, not aware of this problem. Can you please provide a minimal project (preferably a GitHub

unread,

coverage 0 with junit jupiter 5.12

Hi Mike, not aware of this problem. Can you please provide a minimal project (preferably a GitHub

Apr 29

Mehul Parmar, Marc Hoffmann8

Apr 10

Does Jacoco 0.8.7 JAR supports JDK 21 classes

Try to use the JARs we publish on Maven for every release. On 10. Apr 2025, at 18:41, Mehul Parmar

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Does Jacoco 0.8.7 JAR supports JDK 21 classes

Try to use the JARs we publish on Maven for every release. On 10. Apr 2025, at 18:41, Mehul Parmar

Apr 10

Samrat Chakraborty, … Sushma Suresh3

Apr 9

How to Achieve Aggregation of Similar Packages in Jacoco

I have question in similar lines what about classPaths in a single package. Example if we have a

unread,

How to Achieve Aggregation of Similar Packages in Jacoco

I have question in similar lines what about classPaths in a single package. Example if we have a

Apr 9

1423_SAMRAT CHAKRABORTY, Marc Hoffmann6

Apr 8

Reports as with Tree Like Structure

The answer from that thread still holds true. Packages are not aggregated. You can user groups if you

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Reports as with Tree Like Structure

The answer from that thread still holds true. Packages are not aggregated. You can user groups if you

Apr 8

Tadas Sabestinas, Marc Hoffmann2

Apr 3

Enhancing JaCoCo Reports with improved Data Visualization

Dear Tadas, that sounds like a fun project! I'm looking forward to ideas how the reports can be

unread,

Enhancing JaCoCo Reports with improved Data Visualization

Dear Tadas, that sounds like a fun project! I'm looking forward to ideas how the reports can be

Apr 3

Apr 1

0.8.13 Release?

Hi all, Java 24 is released, ASM 8.8.0 with Java 25 support is released, wouldn't be a time to

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0.8.13 Release?

Hi all, Java 24 is released, ASM 8.8.0 with Java 25 support is released, wouldn't be a time to

Apr 1

don fong, Marc Hoffmann2

Mar 31

help with "[jacoco:report] Writing bundle 'XXXXX' with 0 classes"

Hi, the message "Writing bundle ... with 0 classes” means that no class files have been found at

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help with "[jacoco:report] Writing bundle 'XXXXX' with 0 classes"

Hi, the message "Writing bundle ... with 0 classes” means that no class files have been found at

Mar 31

Prabitha Susil, … Marc Hoffmann5

Mar 13

Reg: Capturing method data for cases run parallelly

Hi Rajeev, it is not about the session id. It is about the execution data storage: JaCoCo probes are

unread,

Reg: Capturing method data for cases run parallelly

Hi Rajeev, it is not about the session id. It is about the execution data storage: JaCoCo probes are

Mar 13

Sunil Joseph, Evgeny Mandrikov6

Mar 4

Jacoco remote code coverage for QE tests

I solved my issue as follows. If we configured Jacoco agent with JAVA_OPTS as above and the

unread,

Jacoco remote code coverage for QE tests

I solved my issue as follows. If we configured Jacoco agent with JAVA_OPTS as above and the

Mar 4

巴黎天团周周

Feb 19

Jacoco rules exclude invalid

version：0.8.10 <rules> <rule> <element>BUNDLE</element> <excludes> <

unread,

Jacoco rules exclude invalid

version：0.8.10 <rules> <rule> <element>BUNDLE</element> <excludes> <

Feb 19

Benjamin van der Veen, Marc Hoffmann2

Feb 19

Excluding methods by name

Hi Benjamin, JaCoCo (which does the work behind the scenes) does not support configurable method

unread,

Excluding methods by name

Hi Benjamin, JaCoCo (which does the work behind the scenes) does not support configurable method

Feb 19

Elizabeth Sirkova, … Marcel Hoekstra7

Feb 14

Question about Jacoco and Maven incremental builds

Did anyone found a solution for this error mentioned by Abhishek Singh ? " java.lang.

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Question about Jacoco and Maven incremental builds

Did anyone found a solution for this error mentioned by Abhishek Singh ? " java.lang.

Feb 14

KOMAL HAREL, … Marc Hoffmann3

Jan 23

Regarding to jacoco tool having many doubts

Hi, for common problems (typically different class files) there are hints shown in the build output

unread,

Regarding to jacoco tool having many doubts

Hi, for common problems (typically different class files) there are hints shown in the build output

Jan 23

Stuart Lewis, … Marc Hoffmann5

Jan 15

Discuss Enhancement Request

I'm glad to hear that the XML report works for you. Thanks for the feedback, -marc On 14. Jan

unread,

Discuss Enhancement Request

I'm glad to hear that the XML report works for you. Thanks for the feedback, -marc On 14. Jan

Jan 15

Jimmy Rasolosoa

Jan 15

Multi Module with 1 module for specific testing jacoco report

Hello Everyone, I have been searching for quite some time for a solution, but I haven't been able

unread,

Multi Module with 1 module for specific testing jacoco report

Hello Everyone, I have been searching for quite some time for a solution, but I haven't been able

Jan 15

sudheer kumar, Evgeny Mandrikov7

Jan 4

need suggestions regarding jacoco authentication

Thank you so much for your suggestion. it worked. java -javaagent:C:\tools\jacoco\lib\jacocoagent.jar

unread,

need suggestions regarding jacoco authentication

Thank you so much for your suggestion. it worked. java -javaagent:C:\tools\jacoco\lib\jacocoagent.jar

Jan 4

Ljubisa Punosevac, Marc Hoffmann3

12/9/24

Correlation between jUnit tests and source code classes/methods

Hi Marc, Thank you very much for your quick feedback. I will give it a try and see can I follow your

unread,

Correlation between jUnit tests and source code classes/methods

Hi Marc, Thank you very much for your quick feedback. I will give it a try and see can I follow your

12/9/24

Gary Gregory, Mountainminds2

12/7/24

jacoco-maven-plugin 0.8.13?

Dear Gary, 0.8.13 is not yet released. It is only available as SNAPSHOT from the repository described

unread,

jacoco-maven-plugin 0.8.13?

Dear Gary, 0.8.13 is not yet released. It is only available as SNAPSHOT from the repository described

12/7/24

Oleh, Evgeny Mandrikov3

11/28/24

Unsupported class file major version with JDK 21 and JaCoCo 0.8.12

Thank you for your response! After checking, it turned out that due to transitive dependencies in my

unread,

Unsupported class file major version with JDK 21 and JaCoCo 0.8.12

Thank you for your response! After checking, it turned out that due to transitive dependencies in my

11/28/24

11/26/24

SIGSEGV during C2 CompileTask with JDK 21.0.5+11 and Jacoco

Hi, Hi, it seems that since we started using eclipse-temurin:21-jdk-noble (21.0.5+11) in our CI (via

unread,

SIGSEGV during C2 CompileTask with JDK 21.0.5+11 and Jacoco

Hi, Hi, it seems that since we started using eclipse-temurin:21-jdk-noble (21.0.5+11) in our CI (via

11/26/24

11/20/24

How to config jacoco.excludes to a module

Hello, My project consists of two modules, A and B. Previously, both modules were configured to use

unread,

How to config jacoco.excludes to a module

Hello, My project consists of two modules, A and B. Previously, both modules were configured to use

11/20/24

11/16/24

use jacoco instrument command to get probed class and it seems strange

this is my source code : public class App { public static void main(String[] args) throws

unread,

use jacoco instrument command to get probed class and it seems strange

this is my source code : public class App { public static void main(String[] args) throws

11/16/24

11/8/24

Question connected to Cyclomatic complexity calculation formula

The metric of cyclomatic complexity is a bit difficult to understand for me, so I looked for relevant

unread,

Question connected to Cyclomatic complexity calculation formula

The metric of cyclomatic complexity is a bit difficult to understand for me, so I looked for relevant

11/8/24

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