Hi all, I’m planning an upgrade of our NiFi 1.9.0 clusters with external Zookeeper 3.4.6 clusters to NiFi 1.12 or 1.13.
After rolling out an upgrade of only the NiFi software in our test setup, I found that NiFi 1.13.2 would not communicate correctly with the unchanged Zookeeper cluster. Now I’m wondering if it is misconfiguration (ex. The zookeeper connection string with the ports separate or combined as in 1.10+) or just incompatibility. So my question to those who have done this before: Should I upgrade Zookeeper first (to 3.5.x), NiFi first (and fix config errors) or does it need to be both of them at once? As a side note, I haven’t found a compatibility matrix of NiFi and Zookeeper versions, is this documented somewhere or do I just go with the embedded Zookeeper version number of the NiFi release? Regards, Isha Lamboo
