jbrennan333 commented on a change in pull request #2722:
URL: https://github.com/apache/hadoop/pull/2722#discussion_r582364631



##########
File path: 
hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-jobclient/src/test/java/org/apache/hadoop/mapred/ClusterMapReduceTestCase.java
##########
@@ -43,8 +45,21 @@
  * The DFS filesystem is formated before the testcase starts and after it ends.
  */
 public abstract class ClusterMapReduceTestCase {
+  private static final String TEST_ROOT_DEFAULT_PATH =
+      System.getProperty("test.build.data", "target/test-dir");

Review comment:
       Ahh. I see it now.  They are different.  But I don't think you need to 
call getProperty.  Just pass "target/test-dir" as the default for 
setupTestRootDir.




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