Parallel build leads to error in assemble-repository: Mirroring failed: Artifact is not available in the repository

[phermsdorf]

Hi,

when trying to run a pretty large(300+ modules) maven (mixed) reactor build in parallel i encounter the following type of error reproducable:

Failed to execute goal org.eclipse.tycho:tycho-p2-repository-plugin:4.0.10:assemble-repository(default-assemble-repository) on project com.company.product Could not assemble p2 repository Mirroring failed: Messages while mirroring artifact descriptors.: [Artifact canonical: osgi.bundle,javax.inject,1.0.0.v20091030 is not available in the repository file:/C:/Users/peter.hermsdorf/.m2/repository/] -> [Help 1]

the artifact that cannot be found changes, but the error appears sooner or later.
We use tycho 4.0.10 and java 17 with maven 3.9.9 and the problem appears after building with more than one thread.

What's the current state of building in parallel with tycho? Is that supposed to work?

Thanks for any hints ot ideas.
Bye Peter

[laeubi]

Parallel build is supported and we use it quite extensively at platform and I also use it in some other projects without a problem. Can you make sure that there is no other errors reported (e.g. not responding servers/mirrors)

[phermsdorf]

While trying to reproduce and analys this problem it turns out that it was probably caused by using mvn verify instead of always using mvn clean verify which lead to all kind of other problems.
This does not seems to be a good idea to improve build performance ...
If the error comes up again i will comment again.

Thanks anyway.