Pega 81 and Kafka

Stream nodes spawns the kafka brokers jvms. Replication happens between Kaka brokers.Pega uses Charlatan ( instead of zookeeper) and stores info in Pega DB. Kafa Brokers keeps data in filesystem.

If JVM communication between datacenter is not allowed ( as in our case), we will have to disable Kafka. The side effects of disabling it will be that we will not be able to use Queue Processors and stick to Standard Agents.

Below are the steps we need to follow to disable Kafka.

1. Go to Decisioning → Infrastructure → Services → Stream

2. Decommission Stream Nodes

3. Remove the stream nodes from DB

TRUNCATE TABLE PRPCDBA.PR_DATA_STREAM_NODES;

TRUNCATE TABLE PRPCDBA.PR_DATA_STREAM_NODE_UPDATES;

TRUNCATE TABLE PRPCDBA.PR_DATA_STREAM_SESSIONS;

4. Set the below DSS to false.

5. Ensure none of the nodes have Stream node type.

-DNodeType=Stream

JVM restart is required after these changes.