* * org.apache.lucene.queryParser.!ParseException: Cannot parse !'': Encountered "<EOF>" at line 1, column 0.
   * https://issues.apache.org/jira/browse/LUCENE-881
 * http://stackoverflow.com/questions/2272908/java-io-filenotfoundexception-too-many-open-files
   * http://stackoverflow.com/questions/2272908/java-io-filenotfoundexception-too-many-open-files
     * Additionally the limit of open files can be altered. For example in Linux you can modify the /etc/security/limits.conf file.

{{{

lsof -p <pid of jvm>

 where pij of jvm : ps -ax: java (for antonak)
}}}
for the same pid check on /proc/6710/fd

 * http://lucene.apache.org/java/3_0_0/api/core/org/apache/lucene/index/IndexReader.html
 *