From version 2.0.2 the document Fingerprint feature is disabled by default and appears in the solrcore.properties file as alfresco.fingerprint=false.
When applying this flag to an existing SOLR Core a full reindex is recommended. Since no more MINHASH properties will be calculated from the moment the property is set to false, existing Solr Documents won’t be re-calculated in order to remove this additional information until a reindex is executed on the Solr Core.
The Document Fingerprints feature can be used to get similar documents from SOLR using the reserved word FINGERPRINT in FTS search syntax. In order to provide these results, each document in the SOLR Index includes a list of MINHASH fields that create larger Lucene Indexes.