[ https://issues.apache.org/jira/browse/YARN-6793?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Yufei Gu resolved YARN-6793. ---------------------------- Resolution: Duplicate > Duplicated reservation in Fair Scheduler preemption > ---------------------------------------------------- > > Key: YARN-6793 > URL: https://issues.apache.org/jira/browse/YARN-6793 > Project: Hadoop YARN > Issue Type: Bug > Components: fairscheduler > Affects Versions: 2.8.1, 3.0.0-alpha3 > Reporter: Yufei Gu > Assignee: Yufei Gu > Priority: Critical > > There is a delay between preemption happen and containers are killed. If > resources released from nodes before container killing are not enough for the > resource request preemption asking for, reservation happens again at that > node. > E.g. scheduler reserves <memory 2048, vcore 2> in node 1 for app 1 while > preemption. It will take 15s by default to kill containers in node 1 for > fulfill that resource requests. If <memory 1024, vcore 1> was released from > node 1 before the killing, scheduler reserves <memory 2048, vcore 2> again in > node 1 for app1. The second reservation may never be unreserved. -- This message was sent by Atlassian JIRA (v6.4.14#64029) --------------------------------------------------------------------- To unsubscribe, e-mail: yarn-dev-unsubscr...@hadoop.apache.org For additional commands, e-mail: yarn-dev-h...@hadoop.apache.org