Integrate Spark-SQL (Spark 1.6.1) with Hive

You integrate Spark-SQL with Hive when you want to run Spark-SQL queries on Hive tables. This information is for Spark 1.6.1 or earlier users.

For information about Spark-SQL and Hive support, see Spark Feature Support.

Note: If you installed Spark with the MapR Installer, the following steps are not required.

Copy the hive-site.xml file into the SPARK_HOME/conf directory so that Spark and Spark-SQL recognize the Hive Metastore configuration.
Configure the Hive version in the /opt/mapr/spark/spark-<version>/mapr-util/compatibility.version file:
```
hive_versions=<version>
```

Add the following additional properties to the /opt/mapr/spark/spark-<version>/conf/spark-defaults.conf file:

Property Configuration Requirements

spark.yarn.dist.files

Property	Configuration Requirements
spark.yarn.dist.files	Option 1: For Spark on YARN, specify the location of the hive-site.xml and the datanucleus JARs: `/opt/mapr/hive/hive-<hive-version>/conf/hive-site.xml,/opt/mapr/hive/<version>/lib/datanucleus-api-jdo-<version>.jar,/opt/mapr/hive/<version>/lib/datanucleus-core-<version>.jar,/opt/mapr/hive/hive-1.2/lib/datanucleus-rdbms-<version>.jar` Option 2: For Spark on YARN, store hive-site.xml and datanucleus JARs on filesystem, and use the following syntax: `maprfs:///<path to hive-site.xml>,maprfs:///<path to datanucleus jar files>`
spark.sql.hive.metastore.version	Specify the Hive version that you are using. For example, for Hive 1.2.x, set the value to 1.2.0.
spark.sql.hive.metastore.jars	Specify the classpath to JARs for Hive, Hive dependencies, and Hadoop. These files must be available on the node from which you submit Spark jobs: `/opt/mapr/hadoop/hadoop-<hadoop-version>/etc/hadoop:/opt/mapr/hadoop/hadoop-<hadoop-version>/share/hadoop/common/lib/:<rest of hadoop classpath>:/opt/mapr/hive/hive-<version>/lib/accumulo-core-<version>.jar:/opt/mapr/hive/hive-<version>/lib/hive-contrib-<version>.jar:<rest of hive classpath>` For example, when you run with Hive 1.2, you can set the following classpath: `/opt/mapr/hadoop/hadoop-2.7.0/etc/hadoop:/opt/mapr/hadoop/hadoop-2.7.0/share/hadoop/common/lib/:/opt/mapr/hadoop/hadoop-2.7.0/share/hadoop/common/:/opt/mapr/hadoop/./hadoop-2.7.0/share/hadoop/mapreduce/:/opt/mapr/hadoop/hadoop-2.7.0/share/hadoop/yarn/:/opt/mapr/hive/hive-1.2/lib/accumulo-core-1.6.0.jar:/opt/mapr/hive/hive-1.2/lib/hive-contrib-1.2.0-mapr-1607.jar:/opt/mapr/hive/hive-1.2/lib/` For more information, see the Apache Spark documentation.

Option 1: For Spark on YARN, specify the location of the hive-site.xml and the datanucleus JARs:

/opt/mapr/hive/hive-<hive-version>/conf/hive-site.xml,/opt/mapr/hive/<version>/lib/datanucleus-api-jdo-<version>.jar,/opt/mapr/hive/<version>/lib/datanucleus-core-<version>.jar,/opt/mapr/hive/hive-1.2/lib/datanucleus-rdbms-<version>.jar

Option 2: For Spark on YARN, store hive-site.xml and datanucleus JARs on filesystem, and use the following syntax:

maprfs:///<path to hive-site.xml>,maprfs:///<path to datanucleus jar files>

spark.sql.hive.metastore.version Specify the Hive version that you are using. For example, for Hive 1.2.x, set the value to 1.2.0.

spark.sql.hive.metastore.jars

Specify the classpath to JARs for Hive, Hive dependencies, and Hadoop. These files must be available on the node from which you submit Spark jobs:

/opt/mapr/hadoop/hadoop-<hadoop-version>/etc/hadoop:/opt/mapr/hadoop/hadoop-<hadoop-version>/share/hadoop/common/lib/*:<rest of hadoop classpath>:/opt/mapr/hive/hive-<version>/lib/accumulo-core-<version>.jar:/opt/mapr/hive/hive-<version>/lib/hive-contrib-<version>.jar:<rest of hive classpath>

For example, when you run with Hive 1.2, you can set the following classpath:

/opt/mapr/hadoop/hadoop-2.7.0/etc/hadoop:/opt/mapr/hadoop/hadoop-2.7.0/share/hadoop/common/lib/*:/opt/mapr/hadoop/hadoop-2.7.0/share/hadoop/common/*:/opt/mapr/hadoop/./hadoop-2.7.0/share/hadoop/mapreduce/*:/opt/mapr/hadoop/hadoop-2.7.0/share/hadoop/yarn/*:/opt/mapr/hive/hive-1.2/lib/accumulo-core-1.6.0.jar:/opt/mapr/hive/hive-1.2/lib/hive-contrib-1.2.0-mapr-1607.jar:/opt/mapr/hive/hive-1.2/lib/*

For more information, see the Apache Spark documentation.

To verify the integration, run the following command as the mapr user or as a user that mapr impersonates:
```
MASTER=<master-url> <spark-home>/bin/run-example sql.hive.HiveFromSpark
```
The master URL for the cluster is either spark://<host>:7077, yarn-client, or yarn-cluster.

Note: The default port for both HiveServer 2 and the Spark Thrift server is 10000. Therefore, before you start the Spark Thrift server on a node where HiveServer 2 is running, verify that there is no port conflict.