Question

下面是我的hive / conf / hive-site.xml：

<configuration>
   <property>
      <name>javax.jdo.option.ConnectionURL</name>
      <value>jdbc:mysql://127.0.0.1/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>hivepassword</value>
      <description>password for connecting to mysql server</description>
   </property>
</configuration>

我想使用spark-HiveContext访问Hive现有数据库和表。所以在hive / conf / hive-site.xml下面添加了以下行：

<configuration>
   <property>
      <name>javax.jdo.option.ConnectionURL</name>
      <value>jdbc:mysql://127.0.0.1/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>hivepassword</value>
      <description>password for connecting to mysql server</description>
   </property>
   <property>
      <name>hive.metastore.uris</name>
      <value>thrift://127.0.0.1:9083</value>
   </property>
</configuration>

如上所示编辑hive-site.xml后，hive shell无法正常工作。请帮我更新hive-site.xml的正确方法，并帮助我使用HiveContext访问spark-shell上的hive表，如下所示：

val hc = new org.apache.spark.sql.hive.HiveContext(sc);
hc.setConf("hive.metastore.uris","thrift://127.0.0.1:9083");
val a = hc.sql("show databases");
a.show //should display all my hive databases.

请在这个问题上帮助我。

Answer 1

@Chaithu您需要使用hive --service metastore启动您的hive Metastore，然后以这种方式启用hivesupport创建sparksession

 val spark= SparkSession
  .builder()
  .master("local")
  .appName("HiveExample").config("hive.metastore.uris","thrift://hadoop-master:9083")
  .enableHiveSupport()
  .getOrCreate()

无法通过更改hive-site.xml来连接spark-HiveContext来运行配置单元

1 个答案: