title: ActiveMQ ObjectMessage Security is not working on linux with SERIALIZABLE_PACKAGES variable
body: <p>As I read from <a href="http://activemq.apache.org/objectmessage.html" rel="nofollow">activemq object message security article</a>, from activemq 5.12.2 </p>
  
  <blockquote>
    <p>ActiveMQ enforces users to explicitly whitelist packages that can be
    exchanged using ObjectMessages.</p>
  </blockquote>
  
  <p>I put <code>-Dorg.apache.activemq.SERIALIZABLE_PACKAGES="*"</code> into env script into ACTIVEMQ_OPTS env variable, as the article said, but the error is still on.</p>
  
  <p>I fix it in windows, but it is not working in linux.</p>
  
  <p>Does any one have any suggestion?</p>