The below errors are thrown on AEM 6.1 please suggest if any config changes need to be done.
16.03.2016 10:53:56.561 *ERROR* [pool-5-thread-19] org.apache.jackrabbit.oak.plugins.index.lucene.IndexTracker Failed to open Lucene index at /oak:index/lucene
java.io.IOException: Map failed
at sun.nio.ch.FileChannelImpl.map(FileChannelImpl.java:888)
at org.apache.lucene.store.MMapDirectory.map(MMapDirectory.java:283)
at org.apache.lucene.store.MMapDirectory$MMapIndexInput.<init>(MMapDirectory.java:228)
at org.apache.lucene.store.MMapDirectory.openInput(MMapDirectory.java:195)