Merge jacoco-it.exec

[robbie...@gmail.com]

Hi,

I have encoundered a problem while trying to merge several jacoco-it.exec to single .exec file. I have several submodules for which jacoco-it.exec files are generated correctly (jacoco:report-aggregate shows the correct coverage of the classes). However, when I create merged file (using jacoco:merge) it seems that some information from individual jacoco-it.exec files are missing.

All the paths and folders are correct, there is no error while executing the goals. The only problem is the missing information in merged file. Does anybody know what could be causing this problem? Is jacoco:merge meant to be used only for unit test reports or is it also used for integration test reports?

Thank you in advance! 

[Evgeny Mandrikov]

Hi,

Under the hood "report-aggregate" loads and combines exec-files in exact same way as "merge".

exec-files, merge and everything else in JaCoCo is completely independent from the type of execution whether it is unit, integration or manual.

[robbie...@gmail.com]

Thank you for your reply!

What I also noticed while generating jacoco-it.exec files with maven plugin is that the generated files is not always the same size and with same data. Sometimes it is missing information about several tests.

Could you tell me what could be causing this issue?

[Marc Hoffmann]

Hi,

how did you verify the contents of the exec file? You can take a look at the raw data with our command line tool ‘execinfo’ (https://www.jacoco.org/jacoco/trunk/doc/cli.html). Comparing the content of different runs might help to narrow down the problem.

Possible reasons for different content:

- The tests where actually not or differently executed

- Execution data was not or incompletely dumped

- A reset was triggered in the JaCoCo agent

Regards,

-marc

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