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.
Decision Data Store service that contains a working decision data node
Perform the following steps to define a decision data store node:
- Click Designer Studio > Decisioninig > Infrastructure > Services > Decision Data Store.
- Click Add node.
- Select an available Pega 7 Platform node to become a decision data store node.
- Click Submit. The status of the new node is JOINING.
- Click Refresh to ensure that the status of the decision data store node changes to NORMAL.