Hyukjin Kwon created SPARK-57951:
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Summary: MLTest single-prediction checks should tolerate last-ULP
FP differences (macOS arm64)
Key: SPARK-57951
URL: https://issues.apache.org/jira/browse/SPARK-57951
Project: Spark
Issue Type: Bug
Components: ML
Affects Versions: 5.0.0
Reporter: Hyukjin Kwon
MLTest.testClassificationModelSingleRawPrediction and
testProbClassificationModelSingleProbPrediction compare the DataFrame transform
output against the scalar predictRaw/predictProbability output with exact ===
equality. On arm64 macOS the two paths can differ in the last ULP (e.g.
1.543502002724983 vs 1.5435020027249835), failing
MultilayerPerceptronClassifierSuite and others on the Build / Maven (JDK 21,
MacOS-26) lane while Linux stays bit-identical. Compare with a tight absolute
tolerance (1e-9) instead.
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