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https://issues.apache.org/jira/browse/MAPREDUCE-1306?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12843484#action_12843484
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Hadoop QA commented on MAPREDUCE-1306:
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+1 overall. Here are the results of testing the latest attachment
http://issues.apache.org/jira/secure/attachment/12438267/MAPREDUCE-1306-20100308.patch
against trunk revision 921230.
+1 @author. The patch does not contain any @author tags.
+1 tests included. The patch appears to include 10 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 warnings.
+1 release audit. The applied patch does not increase the total number of
release audit warnings.
+1 core tests. The patch passed core unit tests.
+1 contrib tests. The patch passed contrib unit tests.
Test results:
http://hudson.zones.apache.org/hudson/job/Mapreduce-Patch-h6.grid.sp2.yahoo.net/515/testReport/
Findbugs warnings:
http://hudson.zones.apache.org/hudson/job/Mapreduce-Patch-h6.grid.sp2.yahoo.net/515/artifact/trunk/build/test/findbugs/newPatchFindbugsWarnings.html
Checkstyle results:
http://hudson.zones.apache.org/hudson/job/Mapreduce-Patch-h6.grid.sp2.yahoo.net/515/artifact/trunk/build/test/checkstyle-errors.html
Console output:
http://hudson.zones.apache.org/hudson/job/Mapreduce-Patch-h6.grid.sp2.yahoo.net/515/console
This message is automatically generated.
> [MUMAK] Randomize the arrival of heartbeat responses
> ----------------------------------------------------
>
> Key: MAPREDUCE-1306
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-1306
> Project: Hadoop Map/Reduce
> Issue Type: Improvement
> Components: contrib/mumak
> Affects Versions: 0.21.0, 0.22.0
> Reporter: Tamas Sarlos
> Assignee: Tamas Sarlos
> Fix For: 0.21.0, 0.22.0
>
> Attachments: MAPREDUCE-1306-20100108.patch,
> MAPREDUCE-1306-20100308-hong.patch, MAPREDUCE-1306-20100308.patch
>
>
> We propose to make the following changes to mumak, MAPREDUCE-728
> - make the timing of heartbeat responses more realistic by adding an option
> to randomly perturb them
> - randomize the startup time of task trackers in a fixed interval
> - remove 2 magic constants from SimulatorEngine and make sure that the first
> job is submitted only after the entire cluster is up and running
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