Ivan Tsukanov created SPARK-28742:
-------------------------------------
Summary: StackOverflowError when using otherwise(col()) in a loop
Key: SPARK-28742
URL: https://issues.apache.org/jira/browse/SPARK-28742
Project: Spark
Issue Type: Bug
Components: Spark Core
Affects Versions: 2.4.3, 2.4.0
Reporter: Ivan Tsukanov
The following code
{code:java}
val rdd = sparkContext.makeRDD(Seq(Row("1")))
val schema = StructType(Seq(
StructField("c1", StringType)
))
val df = sparkSession.createDataFrame(rdd, schema)
val column = when(col("c1").isin("1"), "1").otherwise(col("c1"))
(1 to 9).foldLeft(df) { case (acc, _) =>
val res = acc.withColumn("c1", column)
res.take(1)
res
}
{code}
falls with
{code:java}
java.lang.StackOverflowError
at org.codehaus.janino.CodeContext.flowAnalysis(CodeContext.java:395)
...{code}
Probably, the problem is spark generates unexplainable big Physical Plan -
!image-2019-08-15-15-10-13-397.png!
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