You should take a look at solr's jira. That'll give you a pretty good idea of the various feature upgrades across versions as well as the bugs present in the various versions.
On Mon, 28 Dec 2015, 17:42 abhi Abhishek <abhi26...@gmail.com> wrote: > Hi All, > i am trying to determine stable version of SOLR 4. is there a blog which > we can refer.. i understand we can read through Release Notes. I am > interested in user reviews and challenges seen with various versions of > SOLR 4. > > > Appreciate your contribution. > > Thanks, > Abhishek > -- Regards, Binoy Dalal