Hi community, Recently I found the behavior of seeking a multi-topics consumer is intuitive. If there are no internal consumers, the `seek` call will just succeed silently.
If a consumer subscribes with a regex and no topics are found, users might think the seek operation succeeds while no topics are sought. I suggest throwing an exception in this case to notify users that the consumer to seek is a multi-topics consumer that contains no topics. It's a breaking change so I'd like to hear more voices in the mail list. For now, I report an error for the C++ client [1], which might also affect the Python and Node.js clients. But the behavior of the Java client does not change. [1] https://github.com/apache/pulsar-client-cpp/pull/426 Thanks, Yunze
