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From "Hudson (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-6210) FS: Node reservations can interfere with preemption
Date Thu, 23 Feb 2017 00:32:45 GMT

    [ https://issues.apache.org/jira/browse/YARN-6210?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15879569#comment-15879569
] 

Hudson commented on YARN-6210:
------------------------------

SUCCESS: Integrated in Jenkins build Hadoop-trunk-Commit #11291 (See [https://builds.apache.org/job/Hadoop-trunk-Commit/11291/])
YARN-6210. FairScheduler: Node reservations can interfere with (kasha: rev 718ad9f6ee93d4145f2bb19b7582ce4e1174feaf)
* (edit) 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
* (edit) hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/scheduler/fair/policies/DominantResourceFairnessPolicy.java
* (edit) hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/main/java/org/apache/hadoop/yarn/util/resource/ResourceCalculator.java
* (edit) hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/test/java/org/apache/hadoop/yarn/server/resourcemanager/scheduler/fair/TestFairScheduler.java
* (edit) hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/scheduler/fair/FSAppAttempt.java
* (edit) hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/main/java/org/apache/hadoop/yarn/util/resource/DominantResourceCalculator.java
* (edit) hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/main/java/org/apache/hadoop/yarn/util/resource/DefaultResourceCalculator.java
* (edit) hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/test/java/org/apache/hadoop/yarn/server/resourcemanager/scheduler/fair/TestFairSchedulerPreemption.java


> FS: Node reservations can interfere with preemption
> ---------------------------------------------------
>
>                 Key: YARN-6210
>                 URL: https://issues.apache.org/jira/browse/YARN-6210
>             Project: Hadoop YARN
>          Issue Type: Bug
>          Components: fairscheduler
>    Affects Versions: 2.9.0
>            Reporter: Karthik Kambatla
>            Assignee: Karthik Kambatla
>             Fix For: 2.9.0
>
>         Attachments: YARN-6210.1.patch, YARN-6210.2.patch, YARN-6210.3.patch, YARN-6210.4.patch
>
>
> Today, on a saturated cluster, apps with pending demand reserve nodes. A new app might
not be able to preempt resources because these nodes are already reserved. This can be reproduced
by the example in YARN-6151. 
> Since node reservations are to prevent starvation of apps requesting large containers,
triggering these reservations only on starved applications would avoid this situation. 



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