Java arrays have hashCodes that are based on the arrays' identities rather than their contents,
so attempting to partition an RDD[Array[_]] or RDD[(Array[_], _)] using a HashPartitioner will
produce an unexpected or incorrect result.
Linear Supertypes
Partitioner, Serializable, Serializable, AnyRef, Any
A org.apache.spark.Partitioner that implements hash-based partitioning using Java's
Object.hashCode.Java arrays have hashCodes that are based on the arrays' identities rather than their contents, so attempting to partition an RDD[Array[_]] or RDD[(Array[_], _)] using a HashPartitioner will produce an unexpected or incorrect result.