// protocolVersion == 3: as with v2 above; just do a quick sanity check
httpRequest =
new DefaultHttpRequest(HttpVersion.HTTP_1_1,
HttpMethod.GET,
"/register?sources=4002&" + DatabusHttpHeaders.PROTOCOL_VERSION_PARAM + "=3");
respHandler = httpClient.sendRequest(_serverAddress, httpRequest);
assertTrue("failed to get a response", respHandler.awaitResponseUninterruptedly(1, TimeUnit.SECONDS));
respObj = respHandler.getResponse();
assertNull("/register v3 returned unexpected error: " +
respObj.getHeader(DatabusHttpHeaders.DATABUS_ERROR_CLASS_HEADER),
respObj.getHeader(DatabusHttpHeaders.DATABUS_ERROR_CLASS_HEADER));