String streamRequest = "/stream?sources=100&size=100000&output=json&checkPoint=" + cp.toString();
HttpRequest httpRequest = new DefaultHttpRequest(HttpVersion.HTTP_1_1, HttpMethod.GET, streamRequest);
SimpleTestHttpClient httpClient = SimpleTestHttpClient.createLocal(TimeoutPolicy.ALL_TIMEOUTS);
SimpleHttpResponseHandler respHandler = httpClient.sendRequest(_serverAddress, httpRequest);
assertTrue("failed to get a response", respHandler.awaitResponseUninterruptedly(1, TimeUnit.SECONDS));
HttpResponse respObj = respHandler.getResponse();
assertNull("/stream returned unexpected error", respObj.getHeader(DatabusHttpHeaders.DATABUS_ERROR_CLASS_HEADER));