Karthik Kambatla created YARN-3485: -------------------------------------- Summary: FairScheduler headroom calculation doesn't consider maxResources for Fifo and FairShare policies Key: YARN-3485 URL: https://issues.apache.org/jira/browse/YARN-3485 Project: Hadoop YARN Issue Type: Bug Components: fairscheduler Affects Versions: 2.7.0 Reporter: Karthik Kambatla Assignee: Karthik Kambatla Priority: Critical
FairScheduler's headroom calculations consider the fairshare and cluster-available-resources, and the fairshare has maxResources. However, for Fifo and Fairshare policies, the fairshare is used only for memory and not cpu. So, the scheduler ends up showing a higher headroom than is actually available. This could lead to applications waiting for resources far longer than then intend to. e.g. MAPREDUCE-6302. -- This message was sent by Atlassian JIRA (v6.3.4#6332)