You can't change existing messages. You can republish messages with new fields and manually set the consumer offsets.
Thanks, Jun On Thu, Jan 29, 2015 at 1:12 PM, Joshua Schumacher <friedhardw...@gmail.com> wrote: > What's the best way to add two 'fields' to my kafka messages once they are > stored? Can I just do a replay on all of them and add the field? How > would I throw out the old kafka messages that don't have the field then? I > am using Druid to process the data, but not sure of how to propagate data > changes all the way down to kafka. > > Thanks, > Josh >