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Hadoop QA commented on YARN-2022: --------------------------------- {color:green}+1 overall{color}. Here are the results of testing the latest attachment http://issues.apache.org/jira/secure/attachment/12649879/YARN-2022.4.patch against trunk revision . {color:green}+1 @author{color}. The patch does not contain any @author tags. {color:green}+1 tests included{color}. The patch appears to include 1 new or modified test files. {color:green}+1 javac{color}. The applied patch does not increase the total number of javac compiler warnings. {color:green}+1 javadoc{color}. There were no new javadoc warning messages. {color:green}+1 eclipse:eclipse{color}. The patch built with eclipse:eclipse. {color:green}+1 findbugs{color}. The patch does not introduce any new Findbugs (version 1.3.9) warnings. {color:green}+1 release audit{color}. The applied patch does not increase the total number of release audit warnings. {color:green}+1 core tests{color}. The patch passed unit tests in hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager. {color:green}+1 contrib tests{color}. The patch passed contrib unit tests. Test results: https://builds.apache.org/job/PreCommit-YARN-Build/3962//testReport/ Console output: https://builds.apache.org/job/PreCommit-YARN-Build/3962//console This message is automatically generated. > Preempting an Application Master container can be kept as least priority when > multiple applications are marked for preemption by > ProportionalCapacityPreemptionPolicy > --------------------------------------------------------------------------------------------------------------------------------------------------------------------- > > Key: YARN-2022 > URL: https://issues.apache.org/jira/browse/YARN-2022 > Project: Hadoop YARN > Issue Type: Sub-task > Components: resourcemanager > Affects Versions: 2.4.0 > Reporter: Sunil G > Assignee: Sunil G > Attachments: YARN-2022-DesignDraft.docx, YARN-2022.2.patch, > YARN-2022.3.patch, YARN-2022.4.patch, Yarn-2022.1.patch > > > Cluster Size = 16GB [2NM's] > Queue A Capacity = 50% > Queue B Capacity = 50% > Consider there are 3 applications running in Queue A which has taken the full > cluster capacity. > J1 = 2GB AM + 1GB * 4 Maps > J2 = 2GB AM + 1GB * 4 Maps > J3 = 2GB AM + 1GB * 2 Maps > Another Job J4 is submitted in Queue B [J4 needs a 2GB AM + 1GB * 2 Maps ]. > Currently in this scenario, Jobs J3 will get killed including its AM. > It is better if AM can be given least priority among multiple applications. > In this same scenario, map tasks from J3 and J2 can be preempted. > Later when cluster is free, maps can be allocated to these Jobs. -- This message was sent by Atlassian JIRA (v6.2#6252)