thank you, Ismael! a follow up question (or two :) ): -- our clients (consumers and producers) are all upgraded to Kafka 2.4.0 / ZK 3.5.6 version at this time, and since it is a very involved process to upgrade them, I'd want to leave them at that for now. Any issues you can think of running clients at these versions and brokers at version 2.5.1/ZK 3.5.8 ? -- the brokers upgrade from 0.11 directly to 2.5.1: any words of wisdom on what particular properties I should pay attention to, that might have changed default values or semantics in between? I have compared server, consumer, producer and zookeeper properties files between those distributions and did not se anything critical, but just wanted to make sure....
Thank you! Marina Sent with [ProtonMail](https://protonmail.com) Secure Email. ‐‐‐‐‐‐‐ Original Message ‐‐‐‐‐‐‐ On Tuesday, August 11, 2020 6:02 PM, Ismael Juma <ism...@juma.me.uk> wrote: > Note that 2.5.1 has now been released. > > Ismael > > On Sun, Aug 2, 2020 at 11:13 AM Ismael Juma <ism...@juma.me.uk> wrote: > >> Hi Marina, >> >> If you upgrade to ZK 3.5.x, I highly recommend going with 3.5.8. It has a >> few critical fixes when compared to 3.5.6. Also, Kafka 2.5.1 should be out >> in a few days and I'd recommend that over 2.4.1. >> >> Ismael >> >> On Sun, Aug 2, 2020 at 10:04 AM Marina Popova >> <ppine7...@protonmail.com.invalid> wrote: >> >>> Actually, I'm very interested in your experience as well.... I'm about to >>> start the same (similar) upgrade - from Kafka 0.11/ZK3.4.13 to Kafka 2.4/ZK >>> 3.5.6 >>> >>> I have Kafka and ZK as separate clusters. >>> >>> My plan is : >>> 1. rolling upgrade the Kafka cluster to 2.4 - using the >>> inter.broker.protocol.version set to 0.11 at first >>> 2. rolling upgrade ZK cluster to 3.5.6 >>> 3. set inter.broker.protocol.version=2.4.0 and rolling restart the Kafka >>> cluster again >>> >>> Anybody sees a problem with this approach? >>> >>> thanks, >>> Marina >>> >>> Sent with ProtonMail Secure Email. >>> >>> ‐‐‐‐‐‐‐ Original Message ‐‐‐‐‐‐‐ >>> On Thursday, July 23, 2020 4:01 PM, Andrey Klochkov <akloch...@liftoff.io> >>> wrote: >>> >>>> Hello, >>>> We're upgrading our Kafka from 1.1.0 to 2.4.1 and I'm wondering if ZK needs >>>> to be upgraded too (we're currently on 3.4.6). The upgrade guide says that >>>> "kafka has switched to the XXX version of ZK" but never says if switching >>>> to a newer ZK is mandatory or not. What are the guidelines on keeping Kafka >>>> and ZK compatible? >>>> >>>> --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- >>>> >>>> Andrey Klochkov
