So the correct way to specify the Solr URL would be "--solr http://quickstart.cloudera:8983/solr", but that is equivalent to what solrtctl should do if you don't specify anything in this case. If I stop the solr-server service and try the command I get the exact same error as you, so let's have a look at what errors you can find in /var/log/solr/solr.out or /var/log/solr/catalina*.log. Note that you'll need to run the 'service' commands with 'sudo'. ... View more