presto-main/src/main/java/io/prestosql/execution/SqlTaskExecution.java/Status/decrementPendingCreation
class Status:        public synchronized void decrementPendingCreation(int pipelineId, Lifespan lifespan)
        {
            checkState(per(pipelineId, lifespan).pendingCreation > 0, "Cannot decrement pendingCreation for Pipeline %s Lifespan %s. Value is 0.", pipelineId, lifespan);
            per(pipelineId, lifespan).pendingCreation--;
            if (per(pipelineId, lifespan).pendingCreation == 0 && per(pipelineId, lifespan).noMoreDriverRunner) {
                per(pipelineId).unacknowledgedLifespansWithNoMoreDrivers.add(lifespan);
            }
            per(pipelineId).pendingCreation--;
        }