How to deploy a custom Apache Spark configuration in Azure Synapse Studio

To deploy a custom Apache Spark configuration in Azure Synapse Studio, follow these steps:

1. Open Synapse Studio, navigate to Manage > Apache Spark configurations.
2. Click the New button to start a new configuration (or use Import to load a local .json/.txt/.conf file).
3. Enter a valid Name, optional Description, and add any Annotations as needed.
4. Under Configuration properties, click Add to insert key‑value pairs such as spark.synapse.key1 and spark.synapse.key2; if no property is added, the service uses default values.
5. Press Continue to validate the entered values.
6. When validation succeeds, click Create to save the configuration.
7. Finally, select Publish all to make the configuration available for notebooks, job definitions, or Spark pools.

Verification: after publishing, open a notebook or job definition, expand the Apache Spark configuration drop‑down, and confirm that the new name appears in the list.

Rollback: if the configuration causes issues, you can revert a pool, notebook, or job to the default configuration by editing the selection and choosing the built‑in default, or by deleting the custom configuration and republishing.