如何避免一个heroku请求超时？

我已经将我的node.js服务部署到Heroku，但面临请求超时错误： https ： //devcenter.heroku.com/articles/error-codes#h12-request-timeout 。

我怎样才能避免这一点或解决这个问题？ 这是node.js服务中的错误还是可以在Heroku Dyno设置中更改？

这在日志中显示：

2015-06-21T00:48:01.965583+00:00 heroku[router]: at=error code=H12 desc="Request timeout" method=POST path="/" host=damp-meadow-5935.herokuapp.com request_id=4ca2e2a9-b983-4cec-a8e1-cd7e73c5b274 fwd="54.157.11.252" dyno=web.1 connect=2ms service=30007ms status=503 bytes=0 

我的node.js服务如下所示：

 // set up ====================================================================== var express = require('express'); var app = express(); // create our app w/ express var port = process.env.PORT || 5001; // set the port var bodyParser = require('body-parser'); var methodOverride = require('method-override') app.use(bodyParser.json()); app.use(bodyParser.urlencoded({extended: true})); app.use(function (req, res, next) { //the code hits this point! var data = ''; req.on('data', function (chunk) { data += chunk; }); req.on('end', function () { req.rawBody = data; next(); }); //console.log(data); }); app.use(methodOverride()); // routes ====================================================================== require('./routes.js')(app); var server = app.listen(port); 

和：

 var _ = require('underscore'); module.exports = function (app) { app.post('/', function (req, res) { console.log('testing entering /api/filter'); var Validator = require('jsonschema').Validator; var v = new Validator(); var jso = req.rawBody; var newjso = JSON.parse(req.rawBody); var schema={ "description": "A payload", "type": "object" } var result = v.validate(newjso,schema); if (result.errors.length > 0) { res.setHeader('content-type', 'application/json'); res.status(400); res.json({ "error": "Could not decode request: JSON parsing failed" }); } else { var resp = _.filter(_.where(newjso.payload, {drm: true}), function (item) { return item.episodeCount > 0 }); var newArray = []; resp.forEach(function (item) { var newItem = _.pick(item, 'image', 'slug', 'title'); newItem.image = _.propertyOf(newItem.image)('showImage'); newArray.push(newItem); }) res.setHeader('content-type', 'application/json'); res.status(200); res.json(newArray); } console.log('testing einde'); }) }