title: db already exists with different case other
body: <p>i try to read data from a MongoDB. and i have a problem:</p>
  
  <pre><code>Exception in thread "main" com.mongodb.MongoException: db already exists with different case other 
  </code></pre>
  
  <p>the exeption throws from here:</p>
  
  <pre><code>DBCursor cur[] = new DBCursor[cursorSize];
  ...
  cur[i].hasNext() // Exeption
  </code></pre>
  
  <p>what is the problem?</p>
  
  <p>the version of Mongo is 2.10.1</p>