Hi Matthias, Thanks for quick reply. Little precise about my need… I have 23 brokers in the confluent cluster. I have 500+ filebeats running as producers in prod environment. All filebeats have static broker hosts configured. Some have 3 brokers, some 8 some 12 and some has 23 brokers configured. Also there are 70+ logstash as consumers. All I want is… Switching off the confluent version on Zookeeper and start apache version(anything that can support confluent 7.7.2) on same hosts same ports. ( Not sure about data path directory) Same for all brokers in rolling fashion Not at once. I dont want any downtime. 500+ filebeats and 70+ logstash shouldn’t experience any downtime.
is it possible? Regards, Sunil. On Tue, 10 Feb 2026 at 9:44 PM, Matthias J. Sax <[email protected]> wrote: > > OS apache kafka version 3.4 Or 3.5 is last > >> version that supports zookeeper. > > That's not correct. Apache Kafka supports ZK up-to-including 3.9. > > Confluent 7.7 maps to Apache Kafka 3.7, Confluent guarantee that it's > compatible is OSS Kafka. So switching to Apache Kafka 3.7 should not > cause any issues. Of course, as always you might want to test this in a > non-prov environment first. > > In any case, if you want to move to 4.x, you need to migrate off ZK > first. It's recommended to upgrade to 3.9 first, as it's the most stable > release with respect to ZK to KRaft migration. Migration to KRaft would > be the next step. And after you are on KRaft, upgrade to your desired > 4.x version. > > Of course, it's also possible to skip the step to migrate to 3.9, and > upgrade from 3.7 (with KRaft) to 4.x directly. > > > -Matthias > > > > On 2/10/26 7:22 AM, sunil chaudhari wrote: > > Hi , > > > > Any kafka admin to help here and tell me migration path for this > version. I > > have confluent-7.7.2 running with Zookeeper. I have to move to Open > source > > Apache Kafka 4.0 or above. OS apache kafka version 3.4 Or 3.5 is last > > version that supports zookeeper. Give me migration path so that I move > > form "confluent-7.72 with Zookeeper" to OS apache Kafka 4.0 or Above with > > KRaft Controllers. > > > > What if I move from Zookeeper to Kraft in Confluent 7.7.2 then I do > Inplace > > upgrade to OS apache kafka 3.5 or 3.4? Here I can get rid of > Confluent. And > > then I upgrade to 4.0 Open Source version. > > > > Is there any risk if metadata in Confluent not match with metadata in > > apache kafka. ? > > > > Regards, > > > > Sunil. > > > >
