On 4/5/2016 3:08 PM, Anuj Lal wrote: > I am new to solr. Need some advice from more experienced solr team members > > I am upgrading 4.4 solr cluster to 5.5 > > One of the step I am doing for upgrade is to bootstrap from existing 4.4 solr > home ( after upgrading solr installation to 5.5)
We'll need a lot more detail about *exactly* what "bootstrap" means here. The fact that you chose the word "bootstrap" to describe your process sets off a red flag in my mind, and might mean that you're doing this upgrade in a way that won't work like you're expecting it to. One particular question I'd like to have answered: Are you upgrading each server in place using the exact same zkHost string as the 4.4 install was using, or are you trying to build up a new ZK chroot/database using the existing Solr home? I have not actually performed one of these SolrCloud upgrades, but I would expect that if you don't connect to the existing zookeeper database, it would probably behave exactly like you've described. If I'm completely wrong about how this should be done, somebody please let me know. Going from 4.4 to 5.5 is a significant upgrade (including one major release, 10 minor releases, and 10 bugfix releases) and you might find that the two versions won't coexist very well. The devs do try to make different versions compatible, but SolrCloud is evolving at an extremely rapid pace, so this cannot be guaranteed when the version difference is so large. Assuming I have a correct mental picture of how you got to where you are, there might be some things you could do to get it back on track, but that would require significant manual fiddling, and no guarantee of success. Thanks, Shawn
