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User based queue mapping for Capacity Scheduler

When I  started to use Capacity Scheduler hierarchical queue features on top of Hortonworks' HDP 2.0 I have immediately realized that I need automatic assignment of job to queue based on username.

Sounds easy and useful? Yes! But could not find any configuration parameter and example for that.

I found only references to use mapred.job.queuename config option. This can be configured in HIVE via set mapred.job.queuename=yourqueue or using -Dmapred.job.queuename=yourqueue as a hadoop command argument.

After some hours of unavailing googling I have checked the corresponding code part and have been shocked. This is available only since HADOOP-2.6 (HDP-2.2). Check YARN-2411 for details. According to the CHANGELOG this is a relatively new feature. So sadly this is not available to me until an upgrade.


See below an example based on YARN-2411 to use it in Hadoop 2.6 or higher for Hortonworks HDP-2.2

1. user1 is mapped to queue1, group1 is mapped to queue2:


2. To map users to queues with the same name as the user:


Update: As a workaround I have configured the default queue to have very low 10% capacity with the possibility to use even 100% and created another queue which has 90% capacity (up to 100%) and can be used only by a special user. Also enabled ProportionalCapacityPreemptionPolicy so the system will kill over allocated resources from default queue in case prio queue needs those.

Example config:


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