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No decision data store nodes defined

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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

  1. In the header of Dev Studio, click Configure Decisioning Infrastructure Services Decision Data Store .

  2. Click Add node.

  3. Select an available Pega Platform node to become a decision data store node.

  4. Click Submit.

    The status of the new node is JOINING.
  5. 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
    The Decision Data Store tab shows a node with the normal
                                        status.
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