Configure Livy with Spark Modes

This topic describes how to configure Livy with different Spark modes.

Use these steps to configure Livy:
  1. Modify the livy.conf file (/opt/mapr/livy/livy-<version>/conf/livy.conf):
    1. If Spark jobs run in local mode, set the livy.spark.master property:
      ...
# What spark master Livy sessions should use.
livy.spark.master = local[*]
...
    2. If Spark jobs run in YARN mode, set the livy.spark.master and livy.spark.deployMode properties (client or cluster). For example:
      ...
# What spark master Livy sessions should use.
livy.spark.master = yarn
# What spark deploy mode Livy sessions should use.
livy.spark.deployMode = client
...
      or
      ...
# What spark master Livy sessions should use.
livy.spark.master = yarn
# What spark deploy mode Livy sessions should use.
livy.spark.deployMode = cluster
...
    3. If Spark jobs run in Standalone mode, set the livy.spark.master and livy.spark.deployMode properties (client or cluster). For example:
      …
# What spark master Livy sessions should use. 
livy.spark.master = spark://node:7077 
# What spark deploy mode Livy sessions should use. 
livy.spark.deployMode = client 
…
      or
      …
# What spark master Livy sessions should use. 
livy.spark.master = spark://node:7077 
# What spark deploy mode Livy sessions should use. 
livy.spark.deployMode = cluster 
…
    4. If Spark jobs run in Mesos mode, set the livy.spark.master property. For example:
      # What spark master Livy sessions should use. 
livy.spark.master = mesos://<mesos-master-node-ip>:5050
  2. To you want to use impersonation with Livy, set livy.impersonation.enabled to true in livy.conf. For example:
    # If livy should impersonate the requesting users when creating a new session. 
livy.impersonation.enabled = true
  3. If you want to be able to access Hive through Spark for Livy, you should configure Spark with Hive, and set livy.repl.enableHiveContext to true in livy.conf. For example:
    ...
# Whether to enable HiveContext in livy interpreter, if it is true hive-site.xml will be detected 
# on user request and then livy server classpath automatically. 
livy.repl.enableHiveContext = true 
...
    NOTE If Hive is installed on a cluster and if Spark is configured on Hive, this property is set to true by default: livy.repl.enableHiveContext = true.
  4. To apply the needed changes, restart the Livy service:
    maprcli node services -name livy -action restart -nodes <livy node>