I have enabled parallel builds with Gradle and I h...
# community-supports
Sergej Koščejev
07/08/2024, 2:58 PMI have enabled parallel builds with Gradle and I have several subprojects whose tasks should have been executed in parallel but they don’t seem to be. How can I find out why Gradle executes them sequentially? Any particular logs I could enable?
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Vampire
07/08/2024, 3:01 PMIf you can, I would recommend you do not enable parallel mode, but instead enable configuration cache. With that all tasks, even within one project, can run in parallel as long as they do not depend on each other.
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Sergej Koščejev
07/08/2024, 3:03 PMI have quite a lot of custom tasks that don’t support configuration cache and some code in the build project that does incompatible things, so I’m not ready to modernize everything yet.
Sergej Koščejev
07/08/2024, 3:03 PMbut eventually, definitely.
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Vampire
07/08/2024, 3:03 PMSad
Vampire
07/08/2024, 3:04 PMWell, then maybe you do not have enough max-workers to do the things in parallel?
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Sergej Koščejev
07/08/2024, 3:04 PMfor now I have project A and project B that should be completely independent and project C that depends on them, and I see that Gradle runs some preparation tasks from A and B in parallel but not the main build task. I’d like to understand whether it sees an unintended dependency between the tasks in A and B.
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Vampire
07/08/2024, 3:04 PMOtherwise, the tasks probably depend on each other somehow and thus cannot run in parallel
Vampire
07/08/2024, 3:05 PMMaybe just trigger the tasks in B and check whether the tasks in A get run automatically by that. (you can also use
-ms
Sergej Koščejev
07/08/2024, 3:05 PMhmm right
Sergej Koščejev
07/08/2024, 3:08 PMI could confirm there are no dependencies between tasks.
Sergej Koščejev
07/08/2024, 3:14 PMok I think it’s probably working, just Gradle seems too lazy to start a new build process at times.
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Sergej Koščejev
07/08/2024, 3:31 PMit almost seems to me as if Gradle was scheduling tasks on parallel runners in advance, without taking into account how long each task actually takes.
Sergej Koščejev
07/08/2024, 3:37 PMit could run task A:x which enables B:x and C:x to run in parallel, then task A:y from the same project which depends only on A:x, but it instead chooses to run A:x, then A:y, and only then starts B:x and C:x.
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Vampire
07/08/2024, 4:07 PM🤷♂️
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