Return-Path: X-Original-To: apmail-hadoop-yarn-issues-archive@minotaur.apache.org Delivered-To: apmail-hadoop-yarn-issues-archive@minotaur.apache.org Received: from mail.apache.org (hermes.apache.org [140.211.11.3]) by minotaur.apache.org (Postfix) with SMTP id 933F919D1B for ; Thu, 17 Mar 2016 05:53:34 +0000 (UTC) Received: (qmail 70774 invoked by uid 500); 17 Mar 2016 05:53:34 -0000 Delivered-To: apmail-hadoop-yarn-issues-archive@hadoop.apache.org Received: (qmail 70341 invoked by uid 500); 17 Mar 2016 05:53:34 -0000 Mailing-List: contact yarn-issues-help@hadoop.apache.org; run by ezmlm Precedence: bulk List-Help: List-Unsubscribe: List-Post: List-Id: Reply-To: yarn-issues@hadoop.apache.org Delivered-To: mailing list yarn-issues@hadoop.apache.org Received: (qmail 70119 invoked by uid 99); 17 Mar 2016 05:53:33 -0000 Received: from arcas.apache.org (HELO arcas) (140.211.11.28) by apache.org (qpsmtpd/0.29) with ESMTP; Thu, 17 Mar 2016 05:53:33 +0000 Received: from arcas.apache.org (localhost [127.0.0.1]) by arcas (Postfix) with ESMTP id BB3832C1F54 for ; Thu, 17 Mar 2016 05:53:33 +0000 (UTC) Date: Thu, 17 Mar 2016 05:53:33 +0000 (UTC) From: "Wangda Tan (JIRA)" To: yarn-issues@hadoop.apache.org Message-ID: In-Reply-To: References: Subject: [jira] [Commented] (YARN-4390) Consider container request size during CS preemption MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit X-JIRA-FingerPrint: 30527f35849b9dde25b450d4833f0394 [ https://issues.apache.org/jira/browse/YARN-4390?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15198795#comment-15198795 ] Wangda Tan commented on YARN-4390: ---------------------------------- Hi [~eepayne], Since YARN-4108 doesn't solve all the issues. (I planned to solve this together with YARN-4108, but YARN-4108 only tackled half of the problem: when containers selected, only preempt useful containers). However, we need select container more clever based on requirement. I'm thinking about this recently and I plan to make some progresses as soon as possible. May I reopen this JIRA and take over from you? > Consider container request size during CS preemption > ---------------------------------------------------- > > Key: YARN-4390 > URL: https://issues.apache.org/jira/browse/YARN-4390 > Project: Hadoop YARN > Issue Type: Bug > Components: capacity scheduler > Affects Versions: 3.0.0, 2.8.0, 2.7.3 > Reporter: Eric Payne > Assignee: Eric Payne > > There are multiple reasons why preemption could unnecessarily preempt containers. One is that an app could be requesting a large container (say 8-GB), and the preemption monitor could conceivably preempt multiple containers (say 8, 1-GB containers) in order to fill the large container request. These smaller containers would then be rejected by the requesting AM and potentially given right back to the preempted app. -- This message was sent by Atlassian JIRA (v6.3.4#6332)