NullPointerException error while saving Scala Dataframe to HBase

[Debabrata Ghosh]

Dear All,
               Greetings ! I am repeatedly hitting a NullPointerException
error while saving a Scala Dataframe to HBase. Please can you help
resolving this for me. Here is the code snippet:

scala> def catalog = s"""{
     |        |"table":{"namespace":"default", "name":"table1"},
     |        |"rowkey":"key",
     |        |"columns":{
     |          |"col0":{"cf":"rowkey", "col":"key", "type":"string"},
     |          |"col1":{"cf":"cf1", "col":"col1", "type":"string"}
     |        |}
     |      |}""".stripMargin
catalog: String

scala> case class HBaseRecord(
     |    col0: String,
     |    col1: String)
defined class HBaseRecord

scala> val data = (0 to 255).map { i =>  HBaseRecord(i.toString, "extra")}
data: scala.collection.immutable.IndexedSeq[HBaseRecord] =
Vector(HBaseRecord(0,extra), HBaseRecord(1,extra), HBaseRecord

(2,extra), HBaseRecord(3,extra), HBaseRecord(4,extra),
HBaseRecord(5,extra), HBaseRecord(6,extra), HBaseRecord(7,extra),

HBaseRecord(8,extra), HBaseRecord(9,extra), HBaseRecord(10,extra),
HBaseRecord(11,extra), HBaseRecord(12,extra),

HBaseRecord(13,extra), HBaseRecord(14,extra), HBaseRecord(15,extra),
HBaseRecord(16,extra), HBaseRecord(17,extra),

HBaseRecord(18,extra), HBaseRecord(19,extra), HBaseRecord(20,extra),
HBaseRecord(21,extra), HBaseRecord(22,extra),

HBaseRecord(23,extra), HBaseRecord(24,extra), HBaseRecord(25,extra),
HBaseRecord(26,extra), HBaseRecord(27,extra),

HBaseRecord(28,extra), HBaseRecord(29,extra), HBaseRecord(30,extra),
HBaseRecord(31,extra), HBase...

scala> import org.apache.spark.sql.datasources.hbase
import org.apache.spark.sql.datasources.hbase


scala> import org.apache.spark.sql.datasources.hbase.{HBaseTableCatalog}
import org.apache.spark.sql.datasources.hbase.HBaseTableCatalog

scala>
sc.parallelize(data).toDF.write.options(Map(HBaseTableCatalog.tableCatalog
-> catalog, HBaseTableCatalog.newTable ->

"5")).format("org.apache.hadoop.hbase.spark").save()

java.lang.NullPointerException
  at
org.apache.hadoop.hbase.spark.HBaseRelation.<init>(DefaultSource.scala:134)
  at
org.apache.hadoop.hbase.spark.DefaultSource.createRelation(DefaultSource.scala:75)
  at
org.apache.spark.sql.execution.datasources.DataSource.write(DataSource.scala:426)
  at org.apache.spark.sql.DataFrameWriter.save(DataFrameWriter.scala:215)
  ... 56 elided


Thanks in advance !

Debu