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https://issues.apache.org/jira/browse/YARN-10085?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17020965#comment-17020965
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Peter Bacsko commented on YARN-10085:
-------------------------------------
Fixed checkstyle in patch v5.
> 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
> Priority: Critical
> Attachments: YARN-10085-001.patch, YARN-10085-002.patch,
> YARN-10085-003.patch, YARN-10085-004.patch, YARN-10085-004.patch,
> YARN-10085-005.patch
>
>
> In the converter, this part is very strict and probably 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}
> It's also misleading, because Fair policy can be used under DRF, so the error
> message is incorrect.
> Let's remove these checks and rewrite the converter in a way that it
> generates a valid config even if fair/drf is somehow mixed.
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