Thanks, Shawn and Daniel for your feedback. We will consider that and see what fits best into our environment.
Regards Andreas >>> "Davis, Daniel (NIH/NLM) [C]" <daniel.da...@nih.gov> 05.07.16 19.36 Uhr >>> Because access to Solr is typically to an API, rather than to webapps having images and static files that can be served directly, I think you can use mod_proxy_http just as well as mod_jk. I would suggest you not pursue trying to get AJP to work. mod_proxy_balancer will work with mod_proxy_http, but you may also want to consider using varnish as a front-end cache rather than Apache httpd. I’m not sure about that architecture myself, because varnish’s strength is in caching the data from the backend systems, and Solr’s data should primarily not be cached. However, varnish is very commonly used for this sort of thing – and if you also have other things behind the balancer (such as WordPress or Drupal), then varnish is becoming a better a way to go. Hope this helps, Dan Davis, Systems/Applications Architect (Contractor), Office of Computer and Communications Systems, National Library of Medicine, NIH From: Andreas Kahl [mailto:k...@bsb-muenchen.de] Sent: Monday, July 04, 2016 5:54 AM To: solr-user@lucene.apache.org Subject: Access Solr via Apache's mod_proxy_balancer or mod_jk (AJP) Hello everyone, we've setup two Solr servers (not SolrCloud) which shall be accessed via Apache webserver's load balancing (either mod_proxy_balancer or mod_jk). 1. Is it possible to configure Solr >5 to enable an AJP port as this was the case in earlier versions when running in Tomcat? 2. If AJP/mod_jk is not possible, how should I set up mod_proxy_balancer? At the moment I run into the error "All workers are in error state". This is my current Apache config: <Proxy balancer://solrCluster> BalancerMember http://server1:8888 BalancerMember http://server2:8888 </Proxy> ProxyPass /solrCluster balancer://solrCluster/solr ProxyPassReverse /solrCluster balancer://solrCluster/solr Accessing a single server with a non balanced ReverseProxy works perfectly, but somehow mod_proxy_balancer's health checks do get negative responses from Solr. Any ideas what's going wrong? (I already tried putting /solr into the BalancerMembers to avoid the redirect from / to /solr) Thanks Andreas
