diff --git a/defaults/solr/solrconfig.xml b/defaults/solr/solrconfig.xml
index 09a01e4aa..cad12cb72 100755
--- a/defaults/solr/solrconfig.xml
+++ b/defaults/solr/solrconfig.xml
@@ -118,8 +118,9 @@
      solr.RAMDirectoryFactory is memory based, not
      persistent, and doesn't work with replication.
      -->
-    <directoryFactory name="DirectoryFactory"
-    class="${solr.directoryFactory:solr.NRTCachingDirectoryFactory}"/>
+    <!-- <directoryFactory name="DirectoryFactory" class="${solr.directoryFactory:solr.NRTCachingDirectoryFactory}"/> -->
+    <directoryFactory name="DirectoryFactory" class="${solr.directoryFactory:solr.MMapDirectoryFactory}"/>
+    <!-- using MMapDirectoryFactory as solution for ClosedChannelException given in https://issues.apache.org/jira/browse/SOLR-2247 -->
     
     <!-- ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
      Index Config - These settings control low-level behavior of indexing