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Hadoop QA commented on YARN-596: -------------------------------- {color:green}+1 overall{color}. Here are the results of testing the latest attachment http://issues.apache.org/jira/secure/attachment/12647256/YARN-596.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 3 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/3852//testReport/ Console output: https://builds.apache.org/job/PreCommit-YARN-Build/3852//console This message is automatically generated. > In fair scheduler, intra-application container priorities affect > inter-application preemption decisions > ------------------------------------------------------------------------------------------------------- > > Key: YARN-596 > URL: https://issues.apache.org/jira/browse/YARN-596 > Project: Hadoop YARN > Issue Type: Bug > Components: scheduler > Affects Versions: 2.0.3-alpha > Reporter: Sandy Ryza > Assignee: Sandy Ryza > Attachments: YARN-596.patch, YARN-596.patch, YARN-596.patch, > YARN-596.patch, YARN-596.patch, YARN-596.patch, YARN-596.patch, > YARN-596.patch, YARN-596.patch, YARN-596.patch, YARN-596.patch, YARN-596.patch > > > In the fair scheduler, containers are chosen for preemption in the following > way: > All containers for all apps that are in queues that are over their fair share > are put in a list. > The list is sorted in order of the priority that the container was requested > in. > This means that an application can shield itself from preemption by > requesting it's containers at higher priorities, which doesn't really make > sense. > Also, an application that is not over its fair share, but that is in a queue > that is over it's fair share is just as likely to have containers preempted > as an application that is over its fair share. -- This message was sent by Atlassian JIRA (v6.2#6252)