The only current way to log solr request queries is:
Please set log4j.logger.org.apache.solr.core.SolrCore.Request=DEBUG to show queries before they are executed. Add this snippet to:
Cloudera Manager --> Solr --> Configuration --> Solr Server Logging Advanced Configuration Snippet (Safety Valve)
If this is set, queries will show a DEBUG log entry before they are executed, then an INFO with qtime and numDocs returned