mysql - 使用 Spark 读取 Hive

Question

问题

我正在尝试从 Hive 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

我已将 hive-site.xml 放在 $SPARK_HOME/conf 和 $HIVE_HOME/conf 中。同样，我可以毫不费力地使用 sqoop 从 mysql 中获取数据并将其导入到 hive 中。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 站点.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>

Answer 1

确保您的 Hive Metastore 配置正确:

<configuration>
  <property>
    <name>hive.metastore.uris</name>
    <value>HIVE METASTORE URI(S) HERE</value>
    <description>URI for client to contact metastore server</description>
  </property>
</configuration>