如何使用Hive支持创建SparkSession(未找到"Hive类")？

Question

我正在尝试运行此代码时遇到此错误.

import org.apache.spark.sql.Dataset;
import org.apache.spark.sql.Row;
import org.apache.spark.sql.SparkSession;
public class App 
{
    public static void main(String[] args) throws Exception {
        String warehouseLocation = "file:" + System.getProperty("user.dir") + "spark-warehouse";
        SparkSession spark = SparkSession
          .builder().master("local")
          .appName("Java Spark Hive Example")
          .config("spark.sql.warehouse.dir", warehouseLocation).enableHiveSupport()
          .getOrCreate();

        String path = "/home/cloudera/Downloads/NetBeansProjects/sparksql1/src/test/Employee.json";

        spark.sql("CREATE TABLE IF NOT EXISTS src (key INT, value STRING)");
        spark.sql("LOAD DATA LOCAL INPATH '"+path+"' INTO TABLE src");



        //load from HDFS

         Dataset<Row> df = spark.read().json(path);

         df.registerTempTable("temp_table");

         spark.sql("create table TEST.employee as select * from temp_table");

         df.printSchema();
         df.show();

        }
}

输出:

线程"main"中的异常java.lang.IllegalArgumentException:无法使用Hive支持实例化SparkSession,因为找不到Hive类.在com.training.hivetest.App.main的org.apache.spark.sql.SparkSession $ Builder.enableHiveSupport(SparkSession.scala:778)(App.java:21)

怎么解决？

Answer 1

将以下依赖项添加到您的maven项目.

<dependency>
        <groupId>org.apache.spark</groupId>
        <artifactId>spark-hive_2.11</artifactId>
        <version>2.0.0</version>
</dependency>