@SitthanatC  Currently there are no plans to implement the functionality to change the Kafka partition key for a queue processor in Pega. The recommended out of the box (OOTB) method is to exclude the use of Queue Processors (QPs) due to the complexity and error situation handling involved. Instead you can manage your work in the form of cases where the Case ID is incremental defining the desired ordering. You can create a Job Scheduler with a cluster level lock to run on a single node at a time. The Job Scheduler can pick up a single case from the top of the list and process it handling all processing errors within the Job Scheduler implementation.

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Change kafka partition key for a queue processor