boolean parallel = nThreads > 1;
        // Propagate the parallel flag to the root session and all the cloned sessions in each project segment
        session.setParallel(parallel);
        for (ProjectSegment segment : projectBuilds) {
            segment.getSession().setParallel(parallel);
        }
        ExecutorService executor = Executors.newFixedThreadPool(nThreads, new BuildThreadFactory());

                    session.getRequest().getDegreeOfConcurrency(),
                    session.getProjects().size());
            // Propagate the parallel flag to the root session
            session.setParallel(threads > 1);
            this.executor = new PhasingExecutor(Executors.newFixedThreadPool(threads, new BuildThreadFactory()));

            // build initial plan
            this.plan = buildInitialPlan(taskSegments);