No decision data store nodes defined
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.
Cause
No node has been defined in the Decision Data Store service. You need to define a decision data store node.
Solution
- 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.
Result: The status of the new node is JOINING. - Click Refresh to ensure that the status of the
decision data store node changes to
NORMAL.
Decision Data Store service with a working decision data node 
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