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https://issues.apache.org/jira/browse/HADOOP-14696?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16116800#comment-16116800
 ] 

Allen Wittenauer commented on HADOOP-14696:
-------------------------------------------


Keep in mind that hadoop-aws/pom.xml (effectively) sets the hadoop.tmp.dir to 
the same as test.build.data.  So there's only two dirs being created:

{code}
[INFO] --- maven-antrun-plugin:1.7:run (define-parallel-tests-dirs) @ 
hadoop-aws ---
[INFO] Executing tasks

main:
[INFO] Executed tasks
[INFO] 
[INFO] --- maven-antrun-plugin:1.7:run (create-parallel-tests-dirs) @ 
hadoop-aws ---
[INFO] Executing tasks

main:
    [mkdir] Created dir: 
/testptch/hadoop/hadoop-tools/hadoop-aws/target/test-dir/1
    [mkdir] Created dir: 
/testptch/hadoop/hadoop-tools/hadoop-aws/target/test-dir/2
    [mkdir] Created dir: 
/testptch/hadoop/hadoop-tools/hadoop-aws/target/test-dir/3
    [mkdir] Created dir: 
/testptch/hadoop/hadoop-tools/hadoop-aws/target/test-dir/4
    [mkdir] Created dir: /testptch/hadoop/hadoop-tools/hadoop-aws/target/test/1
    [mkdir] Created dir: /testptch/hadoop/hadoop-tools/hadoop-aws/target/test/2
    [mkdir] Created dir: /testptch/hadoop/hadoop-tools/hadoop-aws/target/test/3
    [mkdir] Created dir: /testptch/hadoop/hadoop-tools/hadoop-aws/target/test/4
[INFO] Executed tasks
[INFO] 
[INFO] --- maven-surefire-plugin:2.17:test (default-test) @ hadoop-aws ---
{code}

(from 
https://builds.apache.org/job/PreCommit-HADOOP-Build/12968/artifact/patchprocess/patch-unit-hadoop-tools_hadoop-aws.txt)

> parallel tests don't work for Windows
> -------------------------------------
>
>                 Key: HADOOP-14696
>                 URL: https://issues.apache.org/jira/browse/HADOOP-14696
>             Project: Hadoop Common
>          Issue Type: Test
>          Components: test
>    Affects Versions: 3.0.0-beta1
>         Environment: Windows
>            Reporter: Allen Wittenauer
>            Assignee: Allen Wittenauer
>            Priority: Minor
>         Attachments: HADOOP-14696-002.patch, HADOOP-14696-003.patch, 
> HADOOP-14696.00.patch, HADOOP-14696.01.patch
>
>
> If hadoop-common-project/hadoop-common is run with the -Pparallel-tests flag, 
> it fails in create-parallel-tests-dirs from the pom.xml
> {code}
> [ERROR] Failed to execute goal 
> org.apache.maven.plugins:maven-antrun-plugin:1.7:run 
> (create-parallel-tests-dirs) on project hadoop-common: An Ant BuildException 
> has occured: Directory 
> F:\jenkins\jenkins-slave\workspace\hadoop-trunk-win\s\hadoop-common-project\hadoop-common\jenkinsjenkins-slaveworkspacehadoop-trunk-winshadoop-common-projecthadoop-common
>     arget\test\data\1 creation was not successful for an unknown reason
> [ERROR] around Ant part ...<script language="javascript">var baseDirs = [... 
> @ 4:33 in 
> F:\jenkins\jenkins-slave\workspace\hadoop-trunk-win\s\hadoop-common-project\hadoop-common\target\antrun\build-main.xml
> {code}



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