title: When do I have to make entities serializable when using EJB3?
body: <p>I use all of my entities <code>Serializable</code>. However I think it is okay to use without serializable. </p>
  
  <p>But what are the advantages of making an entity <code>Serializable</code>? When do we really have to serialize an entity / or when do not?</p>