title: mongodb connection pooling
body: <p>I am using Java driver to access mongodb. I assume the db connection pooling is internally handled by the driver.But my connection count getting increased every time I access db.</p>
  
  <p>This is my serverStatus log. </p>
  
  <pre><code>"connections" : {
              "current" : 276,
              "available" : 543
      }
  </code></pre>
  
  <p>Do I need to explicitly close mongo connections? how should I manage connection pooling in java? </p>