Slf4j is meant to work with existing frameworks - you can set it up to work with log4j, and Solr will use log4j by default in the about to be released 4.3.
http://wiki.apache.org/solr/SolrLogging - Mark On Apr 26, 2013, at 7:19 AM, Furkan KAMACI <furkankam...@gmail.com> wrote: > I want to use GrayLog2 to monitor my logging files for SolrCloud. However I > think that GrayLog2 works with log4j and logback. Solr uses slf4j. > How can I solve this problem and what logging monitoring system does folks > use?