Rails 4 w/ Heroku RSolr::Error::Http (RSolr::Error::Http - 404 Not Found -
my setup: rails 4, heroku websolr addon. the solr search been working fine months rails 4 (production) application. 1 day quit , went through following stackoverflow answers , none of them worked. answer 1 , answer 2 , answer 3 since didn't have java installed @ 1 point, pretty tedious go through, need mention before answer went through 3 answers before solved it, did above may have enabled it. took me full day of sifting through answers , gut application , remove solr altogether. i solved going heroku dashboard, clicking websolr addon icon took me websolr page heroku app. deleted index there default , set new 1 new name. once new index has been created, copy , paste text in field labeled configure heroku application lastly, went terminal , entered these commands. $ heroku config:add websolr_url=[url_goes_here] $ heroku restart everything works fine now.