: Can not create a Path from a null string

在使用setAsNewAPIHadoopDataset写数据到Hbase时发生如下错误：

: Can not create a Path from a null string
        at (:123)
        at .<init>(:135)
        at .<init>(:89)
        at (:58)
        at (:132)
        at $.write(:101)
        at $$anonfun$saveAsNewAPIHadoopDataset$$mcV$sp(:1085)
        at $$anonfun$saveAsNewAPIHadoopDataset$(:1085)
        at $$anonfun$saveAsNewAPIHadoopDataset$(:1085)
        at $.withScope(:151)
        at $.withScope(:112)
        at (:362)
        at (:1084)

写Hbase的源代码如下：（Scala版） Spark 2.2

import 
import 
import 
import 
import 
import 
import .{SparkConf, SparkContext}

/**
  * Description: Put data into Hbase by map reduce Job.
  *
  * Author : Adore Chen
  * Created: 2017-12-22
  */
object SparkMapJob {

    /**
      * insert 100,000 cost 21035 ms
      *
      * @param args
      */
    def main(args: Array[String]): Unit = {
      val conf = new SparkConf().setAppName("SparkPutByMap")
      val context = new SparkContext(conf)

      val hbaseConf =()
      (TableOutputFormat.OUTPUT_TABLE, "test_table")
      //IMPORTANT: must set the attribute to solve the problem (can't create path from null string )
      ("", "/tmp")

      val job = (hbaseConf)
      (classOf[TableOutputFormat[ImmutableBytesWritable]])
      (classOf[ImmutableBytesWritable])
      (classOf[Put])

      try{
        val rdd = (1 to 100000)

        // column family
        val family = ("cf")
        // column counter --> ctr
        val column = ("ctr")

        (value => {
          var put = new Put((value))
          (family, column, (value))
          (new ImmutableBytesWritable(), put)
          })
          .saveAsNewAPIHadoopDataset()
      }finally{
        ()
      }
    }

}

这是spark的一个bug，具体信息查看：

/jira/browse/SPARK-21549

解决方案：

//IMPORTANT: must set the attribute to solve the problem (can't create path from null string )
      ("", "/tmp")

参考信息：

/hortonworks-spark/shc/issues/15