Github user ProtD commented on the issue:
    To reproduce the bug on v2.2 and v2.3:
    val rawData = Seq((1.0, Vectors.sparse(3, Seq((0, 2.0), (1, 3.0)))),
                      (4.0, Vectors.sparse(3, Seq((0, 5.0), (2, 6.0)))))
    val dfTemp = spark.sparkContext.parallelize(rawData).toDF("label", 
    This causes `java.util.NoSuchElementException: key not found: numFeatures`.

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