[jira] [Commented] (MAPREDUCE-4949) Enable multiple pi jobs to run in parallel

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

    [ https://issues.apache.org/jira/browse/MAPREDUCE-4949?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13557765#comment-13557765 ] 

Hadoop QA commented on MAPREDUCE-4949:
--------------------------------------

{color:red}-1 overall{color}.  Here are the results of testing the latest attachment 
  http://issues.apache.org/jira/secure/attachment/12565577/MAPREDUCE-4949.patch
  against trunk revision .

    {color:green}+1 @author{color}.  The patch does not contain any @author tags.

    {color:red}-1 tests included{color}.  The patch doesn't appear to include any new or modified tests.
                        Please justify why no new tests are needed for this patch.
                        Also please list what manual steps were performed to verify this patch.

    {color:green}+1 javac{color}.  The applied patch does not increase the total number of javac compiler warnings.

    {color:green}+1 javadoc{color}.  The javadoc tool did not generate any warning messages.

    {color:green}+1 eclipse:eclipse{color}.  The patch built with eclipse:eclipse.

    {color:green}+1 findbugs{color}.  The patch does not introduce any new Findbugs (version 1.3.9) 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-examples.

    {color:green}+1 contrib tests{color}.  The patch passed contrib unit tests.

Test results: https://builds.apache.org/job/PreCommit-MAPREDUCE-Build/3251//testReport/
Console output: https://builds.apache.org/job/PreCommit-MAPREDUCE-Build/3251//console

This message is automatically generated.
                
> Enable multiple pi jobs to run in parallel
> ------------------------------------------
>
>                 Key: MAPREDUCE-4949
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-4949
>             Project: Hadoop Map/Reduce
>          Issue Type: Improvement
>          Components: examples
>    Affects Versions: 2.0.2-alpha
>            Reporter: Sandy Ryza
>            Assignee: Sandy Ryza
>            Priority: Minor
>         Attachments: MAPREDUCE-4949.patch
>
>
> Currently the hadoop pi example uses a hardcoded temporary directory to store its inputs and outputs.  This makes it so that only one pi job can run at a time, and that if it is cancelled, the temporary directory must be manually deleted.
> I propose using a temporary directory based on a timestamp and random number to avoid these conflicts

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