When building project using parallel queues, the few firsts builds always fails dues to dependencies error.
This seem to be caused by a concurrency issues between all maven instance and their shared repository.
Having the possibility to define a local repository per built queue, rather that per group would more likely solve this problem.
There's no warranty that 2 groups won't be using the same repository, when building in parallel, except by defining a different repository per single group, which is a waste of space. Moving the repository to the queue level would ensure that every single compilation has its one repository.