[ https://issues.apache.org/jira/browse/MAPREDUCE-3008?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Amar Kamat updated MAPREDUCE-3008: ---------------------------------- Attachment: mapreduce-2591-v1.7.patch Attaching a new patch incorporating Ravi's offline comments. test-patch passed: {noformat} +1 overall. +1 @author. The patch does not contain any @author tags. +1 tests included. The patch appears to include 3 new or modified tests. +1 javadoc. The javadoc tool did not generate any warning messages. +1 javac. The applied patch does not increase the total number of javac compiler warnings. +1 findbugs. The patch does not introduce any new Findbugs (version 1.3.9) warnings. +1 release audit. The applied patch does not increase the total number of release audit warnings. {noformat} All the JUnit tests in test-contrib passed except TestUserResolve, which is a known issue (MAPREDUCE-2950). > [Gridmix] Improve cumulative CPU usage emulation for short running tasks > ------------------------------------------------------------------------ > > Key: MAPREDUCE-3008 > URL: https://issues.apache.org/jira/browse/MAPREDUCE-3008 > Project: Hadoop Map/Reduce > Issue Type: Sub-task > Components: contrib/gridmix > Affects Versions: 0.24.0 > Reporter: Amar Kamat > Labels: cpu-emulation, gridmix > Fix For: 0.24.0 > > Attachments: mapreduce-2591-v1.4.2.patch, mapreduce-2591-v1.7.patch > > > CPU emulation in Gridmix fails to meet the expected target if the map has no > data to sort/spill/merge. There are 2 major reasons for this: > 1. The map task end immediately ends soon after the map task. The map > progress is 67% while the map phase ends. > 2. Currently, the sort (comparator) doesnt emulate CPU. If the map is short > lived, the CPU emulation thread (spawned from the map task in cleanup) > doesn't get a chance to emulate. -- This message is automatically generated by JIRA. If you think it was sent incorrectly, please contact your JIRA administrators: https://issues.apache.org/jira/secure/ContactAdministrators!default.jspa For more information on JIRA, see: http://www.atlassian.com/software/jira