Unsupported literal type class scala.runtime.BoxedUnit

Question

I am trying to filter a column of a dataframe read from oracle as below

import org.apache.spark.sql.functions.{col, lit, when}

val df0  =  df_org.filter(col("fiscal_year").isNotNull())

When I do it I am getting below error:

java.lang.RuntimeException: Unsupported literal type class scala.runtime.BoxedUnit ()
at org.apache.spark.sql.catalyst.expressions.Literal$.apply(literals.scala:77)
at org.apache.spark.sql.catalyst.expressions.Literal$$anonfun$create$2.apply(literals.scala:163)
at org.apache.spark.sql.catalyst.expressions.Literal$$anonfun$create$2.apply(literals.scala:163)
at scala.util.Try.getOrElse(Try.scala:79)
at org.apache.spark.sql.catalyst.expressions.Literal$.create(literals.scala:162)
at org.apache.spark.sql.functions$.typedLit(functions.scala:113)
at org.apache.spark.sql.functions$.lit(functions.scala:96)
at org.apache.spark.sql.Column.apply(Column.scala:212)
at com.snp.processors.BenchmarkModelValsProcessor2.process(BenchmarkModelValsProcessor2.scala:80)
at com.snp.utils.Utils$$anonfun$getAllDefinedProcessors$1.apply(Utils.scala:30)
at com.snp.utils.Utils$$anonfun$getAllDefinedProcessors$1.apply(Utils.scala:30)
at com.sp.MigrationDriver$$anonfun$main$6$$anonfun$apply$2.apply(MigrationDriver.scala:140)
at com.sp.MigrationDriver$$anonfun$main$6$$anonfun$apply$2.apply(MigrationDriver.scala:140)
at scala.Option.map(Option.scala:146)
at com.sp.MigrationDriver$$anonfun$main$6.apply(MigrationDriver.scala:138)
at com.sp.MigrationDriver$$anonfun$main$6.apply(MigrationDriver.scala:135)
at scala.collection.TraversableLike$WithFilter$$anonfun$foreach$1.apply(TraversableLike.scala:733)
at scala.collection.Iterator$class.foreach(Iterator.scala:891)
at scala.collection.AbstractIterator.foreach(Iterator.scala:1334)
at scala.collection.MapLike$DefaultKeySet.foreach(MapLike.scala:174)
at scala.collection.TraversableLike$WithFilter.foreach(TraversableLike.scala:732)
at com.sp.MigrationDriver$.main(MigrationDriver.scala:135)
at com.sp.MigrationDriver.main(MigrationDriver.scala)

Any idea what am I doing wrong here and how to fix this?

Inappreciable

please add more information about versions of Spark, and Spark Cassandra connector... – Cromlech

@AlexOtt , sir Here are the version details : scala - 2.11 spark - 2.3.1 cassandra - 3.11.1 – Inappreciable

and spark-cassandra-connector version? – Cromlech

what do you mean by "trying to filter a column of a dataframe"? can you elaborate that? – Renita

@RameshMaharjan , column "fiscal_year" seems to have some null values , hence failing to load into cassandra ...so from dataframe filtering out those records. – Inappreciable

@AlexOtt sir, its <artifactId>spark-cassandra-connector_2.11</artifactId> <version>2.3.0</version> – Inappreciable

check this #39728242 for filtering and you can check my answer too #50479012 – Renita

@RameshMaharjan I am getting similar error while filtering ...how to fix it .... result_df.filter( col("indicator") === lit('N')) .... ERROR ::: RuntimeException: Unsupported literal type class java.lang.Character N – Inappreciable

isn't the error message clear enough? @user3252097 ? character is not supported in lit function – Renita

Answer 1

Try removing () in isNull() in your filter.

Matchbox

What? there is no isNull in the OP's question – Impulsive

he means to remove the parenthesis on isNotNull, which is the correct answer. – Taft

So this totally worked for me but WHY? What is going on? – Farthermost

Answer 2

Just remove parenthesis on your function:

from:
val df0 = df_org.filter(col("fiscal_year").isNotNull())
to:
val df0 = df_org.filter(col("fiscal_year").isNotNull)

Taft