title: Primefaces graphicImage always showing the same picture
body: <p>I'm using primeFaces to display the coverimage of a series in it's detailView. My problem is, that it is always showing the same picture, except if I refresh my cache (Strg+F5 in Chrome).</p>
  
  <p>My code to display the picture is the following</p>
  
  <pre><code>&lt;ui:define name="content"&gt;
      &lt;h:body&gt;
          &lt;f:view&gt;
              &lt;h:form&gt;
                  &lt;h1&gt;#{seriesController.selectedSeries.name}&lt;/h1&gt;
                  &lt;p:graphicImage value="#{coverController.getFirstCoverOfSeries(seriesController.selectedSeries.id)}"/&gt;
                  [Here are some fields...]
              &lt;/h:form&gt;
          &lt;/f:view&gt;
      &lt;/h:body&gt;
  &lt;/ui:define&gt;
  </code></pre>
  
  <p>I already checked my controller manually - it loads the cover just fine, but primeFaces does not display it correctly (Controller returns a DefaultStreamedContent with the byte[] and the correct type).
  I've seen some people using <code>&lt;f:param&gt;</code> to give the params to the method loading the picture.</p>
  
  <p>I'd really appreciate some help - has <code>&lt;p:graphicImage&gt;</code> some quirks or am I just using it wrong?</p>