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Fix problem with running the DSL in multiple threads #751

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Fix problem with running the DSL in multiple threads #751

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Commits on Feb 17, 2016

  1. Fix problem with running the DSL in multiple threads 

    We use GPars eachParallel() to split up generation of jobs
into multiple threads. This significantly reduced our
run time from 25min to 5min.

Unfortunately, it leads to a race condition, which causes
random jobs to be lost (and deleted) on each run.

Ultimately, it all boils down to this non thread-safe statement
in JobParent.processItem():
  referencedJobs << job

Making the 5 collections asSynchronized() fixed the problem for us.
    @marc-guenther
    marc-guenther committed Feb 17, 2016
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