Managing caching 

Modifying the solrconfig.xml file to use the StandardDirectoryFactory.

The DSENRTCachingDirectoryFactory is deprecated. If you use DSENRTCachingDirectoryFactory or the NRTCachingDirectoryFactory, modify the solrconfig.xml to use the StandardDirectoryFactory. For example, change the directoryFactory element in the solrconfig.xml file as follows: <directoryFactory class="solr.StandardDirectoryFactory" name="DirectoryFactory"/>