Hey Evan, moving forward (so 0.8.3.0 and beyond) the release documentation is going to match up more with specific KIP changes https://cwiki.apache.org/confluence/display/KAFKA/Kafka+Improvement+Proposals which elaborated on things like "breaking changes" and "major modifications you should adopt before breaking changes happen", "etc". This will be helpful not only to know what is changing but a place for discussions prior to those changes to happen in a better forum for everyone.
One of the issues we have now (agreed) is that flattened wire protocol document doesn't provide the information everyone needs fluidly enough. ~ Joe Stein - - - - - - - - - - - - - - - - - http://www.stealth.ly - - - - - - - - - - - - - - - - - On Wed, Mar 4, 2015 at 12:44 PM, Evan Huus <evan.h...@shopify.com> wrote: > Hey all, it seems that 0.8.2 has added a handful more errors to the > protocol which are not yet reflected on the wiki page [1]. Specifically, > [2] seems to indicate that codes 17-20 now have associated meanings. > > My questions are: > - Which of these are exposed "publicly"? (for example, the existing error > 13 is only ever internal to the brokers, so is irrelevant for third-party > clients to know about, are any of the new ones like that?) > - When (if ever) is InvalidTopicException returned, and what is it for that > UnknownTopicOrPartition couldn't be used? > > I would also note that this is the *second* issue I've come across where > the protocol specification is not up-to-date with the protocol actually > used by the 0.8.2 brokers. That specification is what I, as developer of > third-party language bindings, rely on in order to be compatible with Kafka > proper. If you want a healthy community of third-party bindings and > clients, you *have* to do a better job of keeping that documentation up to > date, this is getting really frustrating. Fortunately none of these issues > have caused data loss for us. Yet. > > Thanks, > Evan > > [1] > > https://cwiki.apache.org/confluence/display/KAFKA/A+Guide+To+The+Kafka+Protocol > (currently down for maintenance apparently) > [2] > > https://github.com/apache/kafka/blob/ee1267b127f3081db491fa1bf9a287084c324e36/clients/src/main/java/org/apache/kafka/common/protocol/Errors.java#L46-L49 >
