Submitting batch applications using the Livy API
Spark provides a spark-submit
command for submitting batch
applications. Livy provides equivalent functionality through REST APIs, using job
specifications specified in a JSON document.
The following example shows a spark-submit
command that submits a
SparkPi job, followed by an example that uses Livy POST requests to submit the job. The
remainder of this subsection describes Livy objects and REST API syntax. For additional
examples and information, see the readme.rst file at
https://github.com/hortonworks/livy-release/releases/tag/HDP-2.6.0.3-8-tag.
The following command uses spark-submit
to submit a SparkPi job:
./bin/spark-submit \ --class org.apache.spark.examples.SparkPi \ --master yarn \ --deploy-mode cluster \ --executor-memory 20G \ /path/to/examples.jar 1000
To submit the SparkPi job using Livy, complete the following steps. Note: the POST request does not upload local jars to the
cluster. You should upload required jar files to HDFS before running the job. This is
the main difference between the Livy API and spark-submit
.