Mingliang Liu commented on HADOOP-12984:

+1 for the back port. Thanks [~xyao] for taking care of this.

> Add GenericTestUtils.getTestDir method and use it for temporary directory in 
> tests
> ----------------------------------------------------------------------------------
>                 Key: HADOOP-12984
>                 URL: https://issues.apache.org/jira/browse/HADOOP-12984
>             Project: Hadoop Common
>          Issue Type: Improvement
>          Components: build, test
>    Affects Versions: 3.0.0-alpha1
>            Reporter: Steve Loughran
>            Assignee: Steve Loughran
>             Fix For: 2.9.0, 3.0.0-alpha1
>         Attachments: HADOOP-12984-003.patch, 
> HADOOP-12984.branch-2.8.00.patch, HDFS-9263-001.patch, HDFS-9263-002.patch, 
> HDFS-9263-003.patch
> We have seen some tests had been used the path {{test/build/data}} to store 
> files, so leaking files which fail the new post-build RAT test checks on 
> Jenkins (and dirtying all development systems with paths which {{mvn clean}} 
> will miss.
> In order not to occur these bugs such as MAPREDUCE-6589 and HDFS-9571 again, 
> we'd like to introduce new utility methods to get a temporary directory path 
> easily, and use the methods in tests.

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