the action of return response should be locked

[wavesZh]

In ConfigServer

addListener method:

if (asyncTask.isTimeout()) {
      dataIdContext.remove(dataId, asyncTask);
      response.setStatus(HttpServletResponse.SC_NOT_MODIFIED);  //  action1
      asyncContext.complete();
 }

publishConfig method:

response.setStatus(HttpServletResponse.SC_OK);  // action2
response.getWriter().println(configInfo);
asyncTask.getAsyncContext().complete();

if action1 and action2 happen at the same time， maybe return a response with 200 status code and blank configInfo.