A Queue Processor is not running eventhough stream node is up,how can we debug the root cause?

If a QP is not working say all the stream nodes are up,then also its not processing the activity even if you verified the application stack and access group these are all as expected but still its not working so how to fix this?

did you check the system run time context, you application is updated there?

Please check this step

Configure > Decisioning > Decisions > Data Flows > Real-time processing.

Look for the Data Flow named after your QP. If it shows errors, try stopping and restarting it directly from this landing page.

yes @RanganathK its there

In my opinion, if everything (nodes, access group, application stack) looks fine, you can try the below:

  • Check if the Data Flow (QP) is running without errors and try restarting it

  • Verify Kafka / Stream service - ensure topic is created and messages are flowing

  • Check PegaRULES / logs for any silent failures

  • Validate rule resolution to confirm the correct activity version is picked

  • Check the operator / access group used in system runtime context

  • Try re-saving and restarting the QP / Data Flow

In most cases, it turns out to be a data flow or stream/Kafka issue, even if nodes are up