Did you try setting useCompoundFile to true in solrconfig.xml? Also, try using a lower mergeFactor which will result in fewer segments and hence fewer open files.
Also, I assume you can set the limit using a ulimit command.. ex: ulimit -n200000 -- View this message in context: http://lucene.472066.n3.nabble.com/Solr-4-3-open-a-lot-more-files-than-solr-3-6-tp4079013p4079221.html Sent from the Solr - User mailing list archive at Nabble.com.