Peter Bacsko created YARN-10085:
-----------------------------------

             Summary: FS-CS converter: remove mixed ordering policy check
                 Key: YARN-10085
                 URL: https://issues.apache.org/jira/browse/YARN-10085
             Project: Hadoop YARN
          Issue Type: Sub-task
            Reporter: Peter Bacsko
            Assignee: Peter Bacsko


When YARN-9892 gets committed, this part will become unnecessary:

{noformat}
    // Validate ordering policy
    if (queueConverter.isDrfPolicyUsedOnQueueLevel()) {
      if (queueConverter.isFifoOrFairSharePolicyUsed()) {
        throw new ConversionException(
            "DRF ordering policy cannot be used together with fifo/fair");
      } else {
        capacitySchedulerConfig.set(
            CapacitySchedulerConfiguration.RESOURCE_CALCULATOR_CLASS,
            DominantResourceCalculator.class.getCanonicalName());
      }
    }
{noformat}

We will be able to freely mix fifo/fair/drf, so let's get rid of this strict 
check and also rewrite {{FSQueueConverter.emitOrderingPolicy()}}.



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