>trying to delete old messages is complex and sometimes impossible I'm not familiar with ZeroMQ's data structures, so forgive my ignorance. At the high water m

>trying to delete old messages is complex and sometimes impossible I'm not familiar with ZeroMQ's data structures, so forgive my ignorance. At the high water mark, why can't the consumer throw away old messages instead of the producer throwing away new messages? There are no locks or bugs — that's what the consumer does anyway. I'm not saying that should be the default behavior, but perhaps an option. It's cleaner than silently dropping new messages, then sending an entire buffer of old messages if the subscriber recovers.