title: Solr stopped with Error opening new searcher at org.apache.solr.core
body: <p>Yesterday suddenly our solr server got stopped with following exception</p>
  
  <blockquote>
    <p>org.apache.solr.common.SolrException: Error opening new searcher at
    org.apache.solr.core.SolrCore.openNewSearcher(SolrCore.java:1438) at
    org.apache.solr.core.SolrCore.getSearcher(SolrCore.java:1550) at
    org.apache.solr.core.SolrCore.getSearcher(SolrCore.java:1319) at
    org.apache.solr.update.DirectUpdateHandler2.commit(DirectUpdateHandler2.java:574)
    at
    org.apache.solr.update.processor.RunUpdateProcessor.processCommit(RunUpdateProcessorFactory.java:95)
    at
    org.apache.solr.update.processor.UpdateRequestProcessor.processCommit(UpdateRequestProcessor.java:64)
    at
    org.apache.solr.update.processor.DistributedUpdateProcessor.processCommit(DistributedUpdateProcessor.java:1147)
    at
    org.apache.solr.update.processor.LogUpdateProcessor.processCommit(LogUpdateProcessorFactory.java:157)
    at
    org.apache.solr.handler.loader.XMLLoader.processUpdate(XMLLoader.java:266)
    at org.apache.solr.handler.loader.XMLLoader.load(XMLLoader.java:173)
    at
    org.apache.solr.handler.UpdateRequestHandler$1.load(UpdateRequestHandler.java:92)</p>
    
    <p>Caused by: java.io.IOException: Map failed at
    sun.nio.ch.FileChannelImpl.map(FileChannelImpl.java:889) at
    org.apache.lucene.store.MMapDirectory.map(MMapDirectory.java:283) at
    org.apache.lucene.store.MMapDirectory$MMapIndexInput.</p>
  </blockquote>
  
  <p>But at that time we have lot of memory left in that server. Any guess?</p>