During processing of a data flow work item with the state management option set to Database, the following error is displayed: DNodeException: Unable to obtain session. Cassandra hasn't been started or is unavailable.
No node has been defined in the Decision Data Store service. You need to define a decision data store node.
- In the header of Dev Studio, click .
- Click Add node.
- Select an available Pega Platform node to become a decision data store node.
- Click Submit.
- Click Refresh to ensure that the status of the decision data store node changes to NORMAL.