Github user nicklavers commented on the issue:

    https://github.com/apache/spark/pull/14551
  
    Okay so I've tried a handful of seeds, and none have produced the results 
that the test is expecting. The doctests that are failing are 
`model.gaussiansDF.show()`, which as far as I can tell is just a display method.
    
    On the other hand, the prediction tests, such as `rows[4].prediction == 
rows[5].prediction`, are all passing, so it seems like the model is still 
working, and just the exact output is different.
    
    @yanboliang, and maybe @wangmiao1981, can you speak to exactly what the 
`model.gaussiansDF.show()` tests are testing, and how they might be altered 
without being compromised?


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