DatabricksSubmitRunOperator

Databricks

Submits a Spark job run to Databricks using the api/2.0/jobs/runs/submit API endpoint.

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Last Updated: Apr. 16, 2021

Access Instructions

Install the Databricks provider package into your Airflow environment.

Import the module into your DAG file and instantiate it with your desired params.

Parameters

jsondictA JSON object containing API parameters which will be passed directly to the api/2.0/jobs/runs/submit endpoint. The other named parameters (i.e. spark_jar_task, notebook_task..) to this operator will be merged with this json dictionary if they are provided. If there are conflicts during the merge, the named parameters will take precedence and override the top level json keys. (templated)
spark_jar_taskdictThe main class and parameters for the JAR task. Note that the actual JAR is specified in the libraries. EITHER spark_jar_task OR notebook_task OR spark_python_task OR spark_submit_task should be specified. This field will be templated.
notebook_taskdictThe notebook path and parameters for the notebook task. EITHER spark_jar_task OR notebook_task OR spark_python_task OR spark_submit_task should be specified. This field will be templated.
spark_python_taskdictThe python file path and parameters to run the python file with. EITHER spark_jar_task OR notebook_task OR spark_python_task OR spark_submit_task should be specified. This field will be templated.
spark_submit_taskdictParameters needed to run a spark-submit command. EITHER spark_jar_task OR notebook_task OR spark_python_task OR spark_submit_task should be specified. This field will be templated.
new_clusterdictSpecs for a new cluster on which this task will be run. EITHER new_cluster OR existing_cluster_id should be specified. This field will be templated.
existing_cluster_idstrID for existing cluster on which to run this task. EITHER new_cluster OR existing_cluster_id should be specified. This field will be templated.
librarieslist of dictsLibraries which this run will use. This field will be templated.
run_namestrThe run name used for this task. By default this will be set to the Airflow task_id. This task_id is a required parameter of the superclass BaseOperator. This field will be templated.
timeout_secondsint32The timeout for this run. By default a value of 0 is used which means to have no timeout. This field will be templated.
databricks_conn_idstrThe name of the Airflow connection to use. By default and in the common case this will be databricks_default. To use token based authentication, provide the key token in the extra field for the connection and create the key host and leave the host field empty.
polling_period_secondsintControls the rate which we poll for the result of this run. By default the operator will poll every 30 seconds.
databricks_retry_limitintAmount of times retry if the Databricks backend is unreachable. Its value must be greater than or equal to 1.
databricks_retry_delayfloatNumber of seconds to wait between retries (it might be a floating point number).
do_xcom_pushboolWhether we should push run_id and run_page_url to xcom.

Documentation

Submits a Spark job run to Databricks using the api/2.0/jobs/runs/submit API endpoint.

There are two ways to instantiate this operator.

In the first way, you can take the JSON payload that you typically use to call the api/2.0/jobs/runs/submit endpoint and pass it directly to our DatabricksSubmitRunOperator through the json parameter. For example

json = {
'new_cluster': {
'spark_version': '2.1.0-db3-scala2.11',
'num_workers': 2
},
'notebook_task': {
'notebook_path': '/Users/airflow@example.com/PrepareData',
},
}
notebook_run = DatabricksSubmitRunOperator(task_id='notebook_run', json=json)

Another way to accomplish the same thing is to use the named parameters of the DatabricksSubmitRunOperator directly. Note that there is exactly one named parameter for each top level parameter in the runs/submit endpoint. In this method, your code would look like this:

new_cluster = {
'spark_version': '2.1.0-db3-scala2.11',
'num_workers': 2
}
notebook_task = {
'notebook_path': '/Users/airflow@example.com/PrepareData',
}
notebook_run = DatabricksSubmitRunOperator(
task_id='notebook_run',
new_cluster=new_cluster,
notebook_task=notebook_task)

In the case where both the json parameter AND the named parameters are provided, they will be merged together. If there are conflicts during the merge, the named parameters will take precedence and override the top level json keys.

Currently the named parameters that DatabricksSubmitRunOperator supports are
  • spark_jar_task

  • notebook_task

  • spark_python_task

  • spark_submit_task

  • new_cluster

  • existing_cluster_id

  • libraries

  • run_name

  • timeout_seconds

See also

For more information on how to use this operator, take a look at the guide: DatabricksSubmitRunOperator

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