I have a RESTful server which takes an http POST input from client to vote up songs on server. I have used Apache HTTPClient for client.
public boolean vote(
I don't think it's enough merely to get the response. I think you need to read it (get the entity and read it via EntityUtils.consume()).
e.g. (from the doc)
System.out.println("<< Response: " + response.getStatusLine()); System.out.println(EntityUtils.toString(response.getEntity()));