Merge branch 'laststem-missed-heartbeat-ex-host-description'

Author: michaelklishin

src/main/java/com/rabbitmq/client/impl/AMQConnection.java

@@ -741,8 +741,8 @@ private void readFrame(Frame frame) throws IOException {
 
     /** private API */
     public void handleHeartbeatFailure() {
-        Exception ex = new MissedHeartbeatException("Heartbeat missing with heartbeat = " +
-            _heartbeat + " seconds");
+        Exception ex = new MissedHeartbeatException("Detected missed server heartbeats, heartbeat interval: " +
+            _heartbeat + " seconds, RabbitMQ node hostname: " + this.getHostAddress());
         try {
             _exceptionHandler.handleUnexpectedConnectionDriverException(this, ex);
             shutdown(null, false, ex, true);
@@ -837,7 +837,7 @@ private void handleSocketTimeout() throws SocketTimeoutException {
         // of the heartbeat setting in setHeartbeat above.
         if (++_missedHeartbeats > (2 * 4)) {
             throw new MissedHeartbeatException("Heartbeat missing with heartbeat = " +
-                                               _heartbeat + " seconds");
+                                               _heartbeat + " seconds, for " + this.getHostAddress());
         }
     }