Hi all, Pulsar has a backlog quota policy `producer_request_hold` which will hold the message publish request. It is very useful for some data sync scenarios. It looks like the producer waiting for the consumer to process the data.
But the new producer is not allowed to connect to the topic after reaching the max backlog limitation with producer_request_hold policy. The producer will get `ProducerBlockedQuotaExceededError` error. This caused inconvenience to users, they need to have some retry to logic to try to create the producer again until the consumer acked more messages IMO, we should allow the producer to connect the topic. To keep the behavior consistent with the producer is already connected. WDYT? Best Regards, Penghui
