Github user srowen commented on the issue: https://github.com/apache/spark/pull/17150 The context bound changes won't work on the two public methods: ``` [error] * deprecated method accumulableCollection(java.lang.Object,scala.Function1,scala.reflect.ClassTag)org.apache.spark.Accumulable in class org.apache.spark.SparkContext's type is different in current version, where it is (java.lang.Object,scala.reflect.ClassTag,scala.Function1)org.apache.spark.Accumulable instead of (java.lang.Object,scala.Function1,scala.reflect.ClassTag)org.apache.spark.Accumulable [error] filter with: ProblemFilters.exclude[IncompatibleMethTypeProblem]("org.apache.spark.SparkContext.accumulableCollection") [error] * method this(org.apache.spark.rdd.RDD,java.lang.Class,java.lang.Class,scala.Function1,scala.reflect.ClassTag,scala.Function1,scala.reflect.ClassTag)Unit in class org.apache.spark.rdd.SequenceFileRDDFunctions's type is different in current version, where it is (org.apache.spark.rdd.RDD,java.lang.Class,java.lang.Class,scala.reflect.ClassTag,scala.reflect.ClassTag,scala.Function1,scala.Function1)Unit instead of (org.apache.spark.rdd.RDD,java.lang.Class,java.lang.Class,scala.Function1,scala.reflect.ClassTag,scala.Function1,scala.reflect.ClassTag)Unit [error] filter with: ProblemFilters.exclude[IncompatibleMethTypeProblem]("org.apache.spark.rdd.SequenceFileRDDFunctions.this") ``` Quite unfortunately, they generate signatures that take the same arguments but in differing orders. This bit is one of those tiny breaking changes that will have to wait for Spark 3.x. As I recall they still work in Scala 2.12, even though they are deprecated.
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