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From "Hadoop QA (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (MAPREDUCE-6143) add configuration for mapreduce speculative execution in MR2
Date Thu, 29 Jan 2015 01:33:34 GMT

    [ https://issues.apache.org/jira/browse/MAPREDUCE-6143?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14296217#comment-14296217

Hadoop QA commented on MAPREDUCE-6143:

{color:red}-1 overall{color}.  Here are the results of testing the latest attachment 
  against trunk revision 5a0051f.

    {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:red}-1 findbugs{color}.  The patch appears to introduce 13 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 hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-app

Test results: https://builds.apache.org/job/PreCommit-MAPREDUCE-Build/5129//testReport/
Findbugs warnings: https://builds.apache.org/job/PreCommit-MAPREDUCE-Build/5129//artifact/patchprocess/newPatchFindbugsWarningshadoop-mapreduce-client-core.html
Console output: https://builds.apache.org/job/PreCommit-MAPREDUCE-Build/5129//console

This message is automatically generated.

> add configuration for  mapreduce speculative execution in MR2
> -------------------------------------------------------------
>                 Key: MAPREDUCE-6143
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-6143
>             Project: Hadoop Map/Reduce
>          Issue Type: Improvement
>          Components: mrv2
>    Affects Versions: 2.5.1
>            Reporter: zhihai xu
>            Assignee: zhihai xu
>         Attachments: MAPREDUCE-6143.000.patch, MAPREDUCE-6143.001.patch, MAPREDUCE-6143.002.patch
> add configuration for  mapreduce speculative execution in MR2.
> Currently mapreduce.job.speculative.speculativecap and mapreduce.job.speculative.slownodethreshold
are not used for MR2 mapreduce speculative execution any more.
> We should make the following hardcode constants in DefaultSpeculator configurable for
MR2 Map Reduce speculative execution:
> private static final long SOONEST_RETRY_AFTER_NO_SPECULATE = 1000L * 1L;
> private static final long SOONEST_RETRY_AFTER_SPECULATE = 1000L * 15L;
> private static final double PROPORTION_RUNNING_TASKS_SPECULATABLE = 0.1;
> private static final double PROPORTION_TOTAL_TASKS_SPECULATABLE = 0.01;
> private static final int MINIMUM_ALLOWED_SPECULATIVE_TASKS = 10;

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