Configuring JDBC execution mode

In two steps, you configure Apache Spark to connect to HiveServer (HS2). An example shows how to configure this mode while launching the Spark shell.

  • Accept the default and recommended spark.datasource.hive.warehouse.read.jdbc.mode=cluster for the location of query execution.
  • Accept the default spark.datasource.hive.warehouse.load.staging.dir for the temporary staging location required by HWC.
  • Check that spark.hadoop.hive.zookeeper.quorum is configured.
  • Set Kerberos configurations for HWC, or for an unsecured cluster, set spark.security.credentials.hiveserver2.enabled=false.
  1. Find the HiveServer (HS2) JDBC URL in /etc/hive/conf.cloudera.HIVE_ON_TEZ-1/beeline-site.xml
    The value of beeline.hs2.jdbc.url.HIVE_ON_TEZ-1 is the HS2 JDBC URL in this sample file.
    ...
    <configuration>
     <property>
     <name>beeline.hs2.jdbc.url.default</name>
     <value>HIVE_ON_TEZ-1</value>
     </property>
     <property>
     <name>beeline.hs2.jdbc.url.HIVE_ON_TEZ-1</name>
     <value>jdbc:hive2://nightly7x-unsecure-1.nightly7x-unsecure.root.hwx.site:2181/;serviceDiscoveryMode=zooKeeper;zooKeeperNamespace=hiveserver2;retries=5</value>
     </property>
    </configuration>         
  2. Set the Spark property to the value of the HS2 JDBC URL.
    For example, in /opt/cloudera/parcels/CDH-7.2.1-1.cdh7.2.1.p0.4847773/etc/spark/conf.dist/spark-defaults.conf, add the JDBC URL:
    ...
    spark.sql.hive.hiveserver2.jdbc.url spark.sql.hive.hiveserver2.jdbc.url jdbc:hive2://nightly7x-unsecure-1.nightly7x-unsecure.root.hwx.site:2181/;serviceDiscoveryMode=zooKeeper;zooKeeperNamespace=hiveserver2;retries=5