[HADOOP-12984] Add GenericTestUtils.getTestDir method and use it for temporary directory in tests

• Type: Improvement
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 3.0.0-alpha1
• Fix Version/s: 2.9.0, 3.0.0-alpha1
• Component/s: build, test
• Hadoop Flags: Reviewed
• Assignee: Steve Loughran
• Reporter: Steve Loughran
• Created: 19/Oct/15 13:01
• Updated: 01/Nov/16 10:23
• Resolved: 07/Apr/16 04:50

Description

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.

Issue Links

• duplicates: YETUS-181 asflicense is looking at files under build and getting confused
• is depended upon by: HDFS-10256 Use GenericTestUtils.getTestDir method in tests for temporary directories
• is related to: MAPREDUCE-6589 TestTaskLog outputs a log under directory other than target/test-dir
• is related to: HDFS-9309 Tests that use KeyStoreUtil must call KeyStoreUtil.cleanupSSLConfig()
• is related to: HADOOP-12669 clean up temp dirs in hadoop-project-dist/pom.xml
• relates to: HDFS-9571 Fix ASF Licence warnings in Jenkins reports
• relates to: HDFS-9599 TestDecommissioningStatus.testDecommissionStatus occasionally fails
• links to: GitHub Pull Request #53