Thanks, Erick. I'll give it a go this weekend and see how it behaves. I'll report back so there's a record of my attempts in case anyone else ends up asking the same question.
Some of our customers get a bit nervous when software goes out of support, even if it works fine, so I try to be prepared ;-) On 09/04/2020 13:50, Erick Erickson wrote: > All it means is that there won’t be upgrades/improvements to > ZK, 3.4 will still run. So there’s no need to move to 3.5 independent > of upgrading Solr just because that version of ZK is unsupported > going forward. > > I haven’t personally tried to run 3.5 against an earlier version, but > one thing you’ll probably want to do if you try it is whitelist > “ruok”, “mntr”, and “conf” in your Zookeeper config, see the > Zookeeper documentation. NOTE: that is only necessary if you > want to see the Zookeeper status in the admin UI, those > commands aren’t used by anything else in Solr. > > The JIRA (SOLR-8346) contains a _ton_ of changes, but the mostly > fall in two categories: Using a file rather than strings in tests and > trying to handle the whitelist programmatically, neither of which > are relevant to just dropping a newer version of ZK in.
