[jira] [Commented] (MAPREDUCE-1194) mapred.reduce.slowstart.completed.maps allows values more than 1.0 and less than 0.0

["Hadoop QA (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/MAPREDUCE-1194?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14078285#comment-14078285 ] 

Hadoop QA commented on MAPREDUCE-1194:
--------------------------------------

{color:red}-1 overall{color}.  Here are the results of testing the latest attachment 
  http://issues.apache.org/jira/secure/attachment/12546601/MAPREDUCE-1194.rev1.patch
  against trunk revision .

    {color:red}-1 patch{color}.  The patch command could not apply the patch.

Console output: https://builds.apache.org/job/PreCommit-MAPREDUCE-Build/4774//console

This message is automatically generated.

> mapred.reduce.slowstart.completed.maps allows values more than 1.0 and less than 0.0
> ------------------------------------------------------------------------------------
>
>                 Key: MAPREDUCE-1194
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-1194
>             Project: Hadoop Map/Reduce
>          Issue Type: Bug
>    Affects Versions: 0.20.1
>            Reporter: Maxim Zizin
>            Priority: Minor
>              Labels: newbie
>         Attachments: MAPREDUCE-1194.rev1.patch
>
>
> When run with value less than 0.0 (e.g. -1.0) works similar to 0.0, but when value is more than 1.0 (e.g. 50.0) reducers don't start at all. Is there a reason why such values are allowed? I understand that this is clear from the description that parameter is fraction but some people may forget and confuse it with percents and as result have problems. Why not throw an error in this case?



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