Github user brightchen commented on a diff in the pull request:

    
https://github.com/apache/incubator-apex-malhar/pull/240#discussion_r59810546
  
    --- Diff: 
library/src/test/java/com/datatorrent/lib/io/fs/FileSplitterBaseTest.java ---
    @@ -97,7 +97,13 @@ protected void starting(org.junit.runner.Description 
description)
         @Override
         protected void finished(Description description)
         {
    -      TestUtils.deleteTargetTestClassFolder(description);
    +      try {
    +        //got RuntimeException: java.io.IOException: Unable to delete 
directory 
target/com.datatorrent.lib.io.fs.FileSplitterBaseTest/testSplitterInApp
    +        //in build server and sometime in local machine
    +        TestUtils.deleteTargetTestClassFolder(description);
    --- End diff --
    
    deleteQuietly is method of FileUtils, which means we need to duplicate the 
logic of "new File("target/" + description.getClassName())" 


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