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.. _howto/connection:emr:

Amazon Elastic MapReduce (EMR) Connection

.. note:: This connection type is only used to store parameters to Start EMR Cluster (run_job_flow boto3 EMR client method).

This connection not intend to store any credentials for boto3 client, if you try to pass any parameters not listed in RunJobFlow API <https://docs.aws.amazon.com/emr/latest/APIReference/API_RunJobFlow.html>_ you will get an error like this.

.. code-block:: text

  Parameter validation failed: Unknown parameter in input: "region_name", must be one of:

For Authenticating to AWS please use :ref:Amazon Web Services Connection <howto/connection:aws>.

Configuring the Connection

Extra (optional) Specify the parameters (as a json dictionary) that can be used as an initial configuration in :meth:airflow.providers.amazon.aws.hooks.emr.EmrHook.create_job_flow to propagate to RunJobFlow API <https://docs.aws.amazon.com/emr/latest/APIReference/API_RunJobFlow.html>_. All parameters are optional.