The start and end time fields in the Pipeline Updates API are currently present in the Databricks REST API but are not yet supported (i.e., not included or mapped) in the Databricks Java SDK as of September 2025.
This means:
You can see these fields (start_time and end_time) when you directly call the REST API.
However, these fields are missing from the Java SDK's API response models, so you cannot access them through the SDK currently.
The SDK maintainers have not officially added support for these fields in the SDK release versions to date. An interesting work around to look at - https://community.databricks.com/t5/data-engineering/how-to-get-pipeline-update-duration-programmati...