Github user lianhuiwang commented on the pull request:
https://github.com/apache/spark/pull/1528#issuecomment-49862687
i donot think priority is useful for FAIR scheduler. on YARN scheduler
priority is work with FIFO and not with FAIR. so i think spark application's
scheduler mode is same with YARN.we can see YARN's FAIR:
https://github.com/apache/hadoop-common/blob/trunk/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/scheduler/fair/policies/FairSharePolicy.java
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