Hi, That guide is to upgrade to 3.5.0, which was an alpha version. A lot has changed for the first stable release of 3.5.5 and then a few more, even rolling upgrade issues have been fixed for 3.5.6. This is a more up-to-date guide: https://cwiki.apache.org/confluence/display/ZOOKEEPER/Upgrade+FAQ
If you have done your testing (with prod snapshot!), then you can skip 3.4 latest upgrade, but keep in mind we do our recommendations for a reason. There were issues reported and/or found during testing. Some are fixed with 3.5.6, some only happens if certain conditions stand (IOException: No snapshot found - mentioned in the guide, fixed in 3.5.6). So it is up to you, I would still recommend to do an 3.4 upgrade first, if it's feasible. Regards, Norbert On Tue, Mar 24, 2020 at 11:45 AM kuldeep singh <kuldeep.sing...@gmail.com> wrote: > Hi, > > Current Zookeeper version :- 3.4.5 > Upgraded version :- 3.5.6 > > We are not going with 3.5.7. Our final decision is zookeeper version is > 3.5.6 > as per your reply first we need to move latest version of 3.4.x, like below > > 3.4.5 -> 3.4.14 -> 3.5.6 (Correct me if I am wrong here) > > But if We are not facing any problem that i have shared you that we have > set up of 3 node cluster where 2 node are on 3.5.6 version and 1 node on > 3.4.5, Everything is running fine and didn't get any issue, So what other > problem we can face if we directly move to 3.5.6 > > Thanks, > --------------------- > Kuldeep Singh Budania > Software Architect > > > On Tue, Mar 24, 2020 at 3:58 PM Enrico Olivelli <eolive...@gmail.com> > wrote: > > > Hi > > You have to upgrade to latest 3.4.x Zookeeper then you will upgrade to > > 3.5.7. > > All should run well without issues > > > > > > Enrico > > > > Il Mar 24 Mar 2020, 10:18 kuldeep singh <kuldeep.sing...@gmail.com> ha > > scritto: > > > > > Hi Team, > > > > > > We are upgrading zookeeper from 3.4.5 to 3.5.6. I have set up 3 node > > > cluster where 2 node are on 3.5.6 version and 1 node on 3.4.5. > > > > > > Everything is running fine and didn't get any issue on my system. > > > > > > but I found something on apache site that first we need to upgrade on > > > 3.4.6 than we can upgrade to 3.5.6. So is it mandatory to go on 3.4.6 > > > first. > > > > > > *Upgrading to 3.5.0* > > > > > > Upgrading a running ZooKeeper ensemble to 3.5.0 should be done only > after > > > upgrading your ensemble to the 3.4.6 release. Note that this is only > > > necessary for rolling upgrades (if you're fine with shutting down the > > > system completely, you don't have to go through 3.4.6). If you attempt > a > > > rolling upgrade without going through 3.4.6 (for example from 3.4.5), > you > > > may get the following error: > > > > > > 2013-01-30 11:32:10,663 [myid:2] - INFO [localhost/127.0.0.1:2784 > > > :QuorumCnxManager$Listener@498] - Received connection request / > > > 127.0.0.1:60876 > > > > > > 2013-01-30 11:32:10,663 [myid:2] - WARN [localhost/127.0.0.1:2784 > > > :QuorumCnxManager@349] - Invalid server id: -65536 > > > > > > During a rolling upgrade, each server is taken down in turn and > rebooted > > > with the new 3.5.0 binaries. Before starting the server with 3.5.0 > > > binaries, we highly recommend updating the configuration file so that > all > > > server statements "server.x=..." contain client ports (see the section > > > Specifying > > > the client port). As explained earlier you may leave the configuration > > in a > > > single file, as well as leave the clientPort/clientPortAddress > statements > > > (although if you specify client ports in the new format, these > statements > > > are now redundant). > > > > > > Could you please let me know about this case. Appreciate if respond > soon. > > > > > > Thanks, > > > --------------------- > > > Kuldeep Singh Budania > > > > > >
