Hi, Pulsar Community. I added a new PR that aims to enhance our management of topic subscriptions within PatternMultiTopicsConsumer in Pulsar client. This PR introduces the ability to dynamically add or remove topics from a regex pattern subscription, which can significantly improve our system’s responsiveness and efficiency.
When subscribing to topics using regex patterns, it’s possible to encounter scenarios where some topics process messages slower than others. This can lead to significant performance bottlenecks, as slower topics might block others. There’s a need to manage such situations dynamically to ensure efficient processing and fair resource allocation among topics. Related discussions can be found in [this Reddit thread]( https://www.reddit.com/r/ApachePulsar/comments/1fssbbn/roundrobin_between_wildcard_topics/), which highlights issues similar to what we aim to address. Currently, MultiTopicsConsumerImpl allows unsubscribing from specific topics manually, as demonstrated here <https://github.com/apache/pulsar/blob/5a3a1f169a7f90181bd5c213c8e9f479bc74f0f2/pulsar-client/src/main/java/org/apache/pulsar/client/impl/MultiTopicsConsumerImpl.java#L1246-L1258> . *This proposal seeks to integrate similar functionality into PatternMultiTopicsConsumerImpl, allowing dynamically add or remove specified topics.* Thanks, sinan
