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Hadoop QA commented on TEZ-2217: -------------------------------- {color:green}+1 overall{color}. Here are the results of testing the latest attachment http://issues.apache.org/jira/secure/attachment/12706789/TEZ-2217.1.patch against master revision 6d0b10a. {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 findbugs{color}. The patch does not introduce any new Findbugs (version 2.0.3) 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 . Test results: https://builds.apache.org/job/PreCommit-TEZ-Build/334//testReport/ Console output: https://builds.apache.org/job/PreCommit-TEZ-Build/334//console This message is automatically generated. > The min-held-containers constraint is not enforced during query runtime > ------------------------------------------------------------------------ > > Key: TEZ-2217 > URL: https://issues.apache.org/jira/browse/TEZ-2217 > Project: Apache Tez > Issue Type: Bug > Affects Versions: 0.6.0, 0.7.0 > Reporter: Gopal V > Assignee: Bikas Saha > Attachments: TEZ-2217.1.patch, TEZ-2217.txt.bz2 > > > The min-held containers constraint is respected during query idle times, but > is not respected when a query is actually in motion. > The AM releases unused containers during dag execution without checking for > min-held containers. > {code} > 2015-03-20 15:41:53,475 INFO [DelayedContainerManager] > rm.YarnTaskSchedulerService: Container's idle timeout expired. Releasing > container, containerId=container_1424502260528_1348_01_000013, > containerExpiryTime=1426891313264, idleTimeoutMin=5000 > 2015-03-20 15:41:53,475 INFO [DelayedContainerManager] > rm.YarnTaskSchedulerService: Releasing unused container: > container_1424502260528_1348_01_000013 > {code} > This is actually useful only after the AM has received a soft pre-emption > message, doing it on an idle cluster slows down one of the most common query > patterns in BI systems. > {code} > create temporary table smalltable as ...; > select ... bigtable JOIN smalltable ON ...; > {code} > The smaller query in the beginning throws away the pre-warmed capacity. -- This message was sent by Atlassian JIRA (v6.3.4#6332)