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 file to use the StandardDirectoryFactory. For example,
change the directoryFactory element in the solrconfig as
follows:
<directoryFactory class="solr.StandardDirectoryFactory" name="DirectoryFactory"/>