https://solr.apache.org/docs/5_3_0/solr-core/org/apache/solr/update/UpdateLog.RecoveryInfo.html
UpdateLog.RecoveryInfo (Solr 5.3.0 API)
updatelogsolrapi
https://solr.apache.org/docs/4_6_1/solr-core/org/apache/solr/update/UpdateLog.DBQ.html
UpdateLog.DBQ (Solr 4.6.1 API)
updatelogdbqsolrapi