Hey @balast - if I understood your scenario correctly, you will need to take advantage of manual ack’s from the client and window size. Your consumer will only send an ack once its done processing the message. As you can see in this sample
solace-samples-python/guaranteed_subscriber.py at main · SolaceSamples/solace-samples-python
Solace PubSub+ Messaging API for Python. Join the Solace community for further discussions - solace-samples-python/guaranteed_subscriber.py at main · SolaceSamples/solace-samples-python a persistent message receiver is built with auto acknowledgement configured. you dont want to do that. instead you will send a client ack in the MessageHandler after successfully processing the message