hpcc-systems/HPCC-Platform — pull request #1297 by jakesmith (2012-01-19 10:07:40+00:00)
Title: Turn off parallel subgraph handling if 1

If concurrentSubGraphs is set to 1 (the default) disable the sub graph
executor and handle synchronously.
It's a sensible change regardless, and the feature is experimental only at
this stage, there are still issues handling and blocking on the
dependencies when enabled.

Signed-off-by: Jake Smith