[GitHub] spark pull request #18797: [SPARK-21523][ML] update breeze to 0.13.2 for an ...

[yanboliang <gi...@git.apache.org>]

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

    https://github.com/apache/spark/pull/18797#discussion_r131522271
  
    --- Diff: mllib/src/test/scala/org/apache/spark/mllib/optimization/LBFGSSuite.scala ---
    @@ -191,8 +191,8 @@ class LBFGSSuite extends SparkFunSuite with MLlibTestSparkContext with Matchers
         // With smaller convergenceTol, it takes more steps.
         assert(lossLBFGS3.length > lossLBFGS2.length)
     
    -    // Based on observation, lossLBFGS3 runs 7 iterations, no theoretically guaranteed.
    -    assert(lossLBFGS3.length == 7)
    +    // Based on observation, lossLBFGS3 runs 6 iterations, no theoretically guaranteed.
    +    assert(lossLBFGS3.length == 6)
    --- End diff --
    
    If no theoretically guaranteed, why we need to keep this test? I remember we change here multiple times when we did breeze upgrade. What do you think about just removing this line? We never check the number of iterations at other test suites. @srowen @WeichenXu123 


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