Github user mgaido91 commented on a diff in the pull request:
https://github.com/apache/spark/pull/19648#discussion_r148734734
--- Diff:
mllib/src/test/scala/org/apache/spark/ml/evaluation/ClusteringEvaluatorSuite.scala
---
@@ -22,15 +22,21 @@ import org.apache.spark.ml.param.ParamsSuite
import org.apache.spark.ml.util.DefaultReadWriteTest
import org.apache.spark.ml.util.TestingUtils._
import org.apache.spark.mllib.util.MLlibTestSparkContext
-import org.apache.spark.sql.{DataFrame, SparkSession}
-import org.apache.spark.sql.types.IntegerType
+import org.apache.spark.sql.Dataset
class ClusteringEvaluatorSuite
extends SparkFunSuite with MLlibTestSparkContext with
DefaultReadWriteTest {
import testImplicits._
+ @transient var irisDataset: Dataset[_] = _
--- End diff --
what about using a `lazy val` instead of initializing it `beforeAll` method?
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