我将我的应用从parse迁移到heroku + mlab。我经常会在日志上收到请求超时错误。我打开了详细信息，以下是超时发生时的结果：
2016-05-25T15:27:40.946050+00:00 app[web.1]: [36mverbose[39m: POST /parse/events/AppOpened { host: 'dairy-oneandahalf.herokuapp.com',
2016-05-25T15:27:40.946067+00:00 app[web.1]: connection: 'close',
2016-05-25T15:27:40.946074+00:00 app[web.1]: 'x-parse-app-build-version': '1',
2016-05-25T15:27:40.946084+00:00 app[web.1]: "__type": "Date"
2016-05-25T15:27:41.517425+00:00 app[web.1]: [36mverbose[39m: GET /parse/classes/_User { host: 'dairy-oneandahalf.herokuapp.com',
2016-05-25T15:27:41.517436+00:00 app[web.1]: connection: 'close',
2016-05-25T15:27:41.517445+00:00 app[web.1]: 'x-parse-client-version': 'i1.13.0',
2016-05-25T15:27:41.517448+00:00 app[web.1]: 'x-forwarded-for': '58.152.243.212',
2016-05-25T15:27:40.948269+00:00 heroku[router]: at=info method=POST path="/parse/events/AppOpened" host=dairy-oneandahalf.herokuapp.com request_id=3e9b1390-a1b8-487b-8229-f4c44777b2a4 fwd="58.152.243.212" dyno=web.1 connect=2ms service=6ms status=200 bytes=483
2016-05-25T15:28:12.746545+00:00 app[web.1]: [36mverbose[39m: GET /parse/classes/allPosts { host: 'dairy-oneandahalf.herokuapp.com',
2016-05-25T15:28:12.746591+00:00 app[web.1]: connection: 'close',
2016-05-25T15:28:12.746600+00:00 app[web.1]: 'x-request-id': '84c7c271-4725-42c2-a111-3cf8e2c16d52',
2016-05-25T15:28:12.746602+00:00 app[web.1]: 'total-route-time': '0',
2016-05-25T15:28:12.746605+00:00 app[web.1]: "query": {
2016-05-25T15:28:11.513492+00:00 heroku[router]: at=error code=H12 desc="Request timeout" method=POST path="/parse/classes/_User" host=dairy-oneandahalf.herokuapp.com request_id=1260ec0f-3cee-4c43-a87e-9146ef154e29 fwd="58.152.243.212" dyno=web.1 connect=1ms service=30001ms status=503 bytes=0
我是heroku的新手，有人可以向我解释有什么问题以及我能解决的问题吗？任何帮助将不胜感激，提前感谢