title: activeMQ topic flooding
body: <p>Running ActiveMQ 5.4.0. I have a group of users that subscribe and publish to each other on various topics through a common ActiveMQ JMS provider. After a while of activity, the ActiveMQ console starts displaying </p>
  
  <pre><code>INFO|USAGE MANAGER memory limit reached. Stopping producer (ID ...... to prevent flooding topic .....
  </code></pre>
  
  <p>This message occurs repeatedly for various topics. I know that in some cases, some messages are never delivered. None of the producers on the 'net' are implementing any kind of flow control. They just send and forget. Obviously, some of the producers are being blocked, but most eventually break free. I believe the topics are non-durable/non-persistent.</p>
  
  <p>I'm just using the default activemq configuration. So, how best to fix this problem? Is it wise to disable flow control and how?</p>