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

    https://github.com/apache/spark/pull/18971#discussion_r134550113
  
    --- Diff: 
core/src/test/scala/org/apache/spark/scheduler/ReplayListenerSuite.scala ---
    @@ -151,7 +153,10 @@ class ReplayListenerSuite extends SparkFunSuite with 
BeforeAndAfter with LocalSp
        * assumption that the event logging behavior is correct (tested in a 
separate suite).
        */
       private def testApplicationReplay(codecName: Option[String] = None) {
    -    val logDirPath = Utils.getFilePath(testDir, "test-replay")
    +    val logDir = new File(testDir.getAbsolutePath, "test-replay")
    +    // Here, it creates `Path` from the URI instead of the absolute path 
for the explicit file
    +    // scheme so that the string representation of this `Path` has leading 
file scheme correctly.
    +    val logDirPath = new Path(logDir.toURI)
    --- End diff --
    
    From your description it sounds like `Utils.resolveURI` might not be 
correct for Windows paths. I don't have Windows available, so if you could try 
these it might help in understanding:
    
        Utils.resolveURI("C:\\WINDOWS")
        Utils.resolveURI("/C:/WINDOWS")
        Utils.resolveURI("C:/WINDOWS")
    
    The first two should return the same thing ("file:/C:/WINDOWS" or something 
along those lines) while the third I'm not sure, since it's ambiguous. But 
that's probably the cause of the change of behavior.
    
    Anyway the code change looks correct.


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