The correct way is add following context to default.xml <param> <name>SOLR</name> <value>maxFailoverAttempts=3;failoverSleep=1000;enabled=true</value> </param> <service> <role>SOLR</role> <url>http://<solr_host1>:8886/solr</url> <url>http://<solr_host2>:8886/solr</url> </service> and use below URL for access Solr UI: https://<knox_host>:8443/gateway/default/solr/index.html#/ ... View more