spark查詢elasticsearch

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <groupId>helloScala</groupId>
    <artifactId>helloScala</artifactId>
    <version>1</version>
    <build>
        <sourceDirectory>src</sourceDirectory>
        <plugins>
            <plugin>
                <artifactId>maven-compiler-plugin</artifactId>
                <version>3.3</version>
                <configuration>
                    <source>1.8</source>
                    <target>1.8</target>
                </configuration>
            </plugin>
        </plugins>
    </build>
    <dependencies>
        <dependency>
            <groupId>org.apache.spark</groupId>
            <artifactId>spark-core_2.11</artifactId>
            <version>1.6.1</version>
        </dependency>

        <!-- http://mvnrepository.com/artifact/org.apache.spark/spark-mllib_2.10 -->
        <dependency>
            <groupId>org.apache.spark</groupId>
            <artifactId>spark-mllib_2.11</artifactId>
            <version>1.6.1</version>
        </dependency>

        <!-- http://mvnrepository.com/artifact/org.elasticsearch/elasticsearch-spark_2.10 -->
        <dependency>
            <groupId>org.elasticsearch</groupId>
            <artifactId>elasticsearch-spark_2.11</artifactId>
            <version>5.0.0-alpha3</version>
        </dependency>



    </dependencies>
</project>      

import org.elasticsearch.spark._
import org.elasticsearch.spark.sql._
import org.apache.spark.SparkConf
import org.apache.spark.SparkContext
import org.apache.spark.SparkContext._
import org.apache.hadoop.conf.Configuration
import org.elasticsearch.hadoop.mr.EsInputFormat
import org.apache.hadoop.io.Text
import org.apache.hadoop.io.MapWritable

object EsMain {
  def main(args: Array[String]): Unit = {
    val conf = new SparkConf().setAppName("estest").setMaster("local[*]")

//  conf.set("es.resource", "nm_1606/news") //指定讀取的索引名稱
    conf.set("es.nodes", "127.0.0.1")
    conf.set("es.port","9200")
    conf.set("es.query", " {  \"query\": {    \"match_all\": {    }  }}")  //使用query字元串對結果進行過濾
    val sc = new SparkContext(conf) 
    val rdd = sc.esRDD("nm_1606/news") 
    rdd.foreach( line => println(line._1+"\n"+line._2) )
    println(rdd.count)

  }
}