Pre Upgrade Tasks
In some situations, you must complete tasks before you upgrade.
Verify Installation Requirements
The minimum requirements for Transformer can change with each version. Before you upgrade to a new Transformer version, verify that the Transformer machine and the Spark cluster meet the latest minimum requirements as described in Installation Requirements.
Complete Control Hub On-premises Prerequisite
If you use Transformer with Control Hub On-premises, you must complete a prerequisite task before you upgrade to Transformer version 4.0.x or later.
For details, see the StreamSets Support portal.