问题

我试图从配置单元表中读取，但收到以下错误：

[error] (run-main-0) org.apache.spark.sql.AnalysisException: Table or view not found: tags; line 1 pos 14

我已经把 hive-site.xml 两者都有 $SPARK_HOME/conf 以及 $HIVE_HOME/conf . 同样，我使用sqoop从mysql获取数据并将其导入到hive中也没有遇到任何问题。我的scala代码有问题吗？或者这是一个配置错误？

scala代码：

package test1

import java.io.File
import org.apache.spark.sql.Row
import org.apache.spark.sql.SparkSession

case class Movie(movieid: String, title: String, genres: String)
case class Tag(userid: String, title: String, tag: String)

object SparkHiveTest {
    def main(args: Array[String]) {
        val warehouseLocation = new File("spark-warehouse").getAbsolutePath
        val spark = SparkSession
            .builder()
            .master("local")
            .appName("SparkHiveExample")
            .config("spark.sql.warehouse.dir", warehouseLocation)
            .enableHiveSupport()
            .getOrCreate()

        spark.sql("SELECT * FROM tags").show()                      
        spark.stop()
    }
}

hive-site.xml:

<configuration>

   <property>

      <name>javax.jdo.option.ConnectionURL</name>

      <value>jdbc:mysql://localhost/metastore?createDatabaseIfNotExist=true</value>

      <description>metadata is stored in a MySQL server</description>

   </property>

   <property>

      <name>javax.jdo.option.ConnectionDriverName</name>

      <value>com.mysql.jdbc.Driver</value>

      <description>MySQL JDBC driver class</description>

   </property>

   <property>

      <name>javax.jdo.option.ConnectionUserName</name>

      <value>hiveuser</value>

      <description>user name for connecting to mysql server</description>

   </property>

   <property>

      <name>javax.jdo.option.ConnectionPassword</name>

      <value>hivepass</value>

      <description>password for connecting to mysql server</description>

   </property>

</configuration>