Error: EMFILE: too many open files, open '/data/usercenter/views/error.jade' at Error (native) at Object.fs.openSync (fs.js:584:18) at Object.fs.readFileSync (fs.js:431:33) at Object.exports.renderFile (/data/usercenter/node_modules/jade/lib/jade.js:304:10) at View.exports.renderFile [as engine] (/data/usercenter/node_modules/jade/lib/jade.js:290:21) at View.render (/data/usercenter/node_modules/express/lib/view.js:76:8) at Function.app.render (/data/usercenter/node_modules/express/lib/application.js:503:10) at ServerResponse.res.render (/data/usercenter/node_modules/express/lib/response.js:802:7) at Layer.handle (/data/usercenter/app.js:72:9) at trim_prefix (/data/usercenter/node_modules/express/lib/router/index.js:235:17) at /data/usercenter/node_modules/express/lib/router/index.js:208:9 at Function.proto.process_params (/data/usercenter/node_modules/express/lib/router/index.js:269:12) at IncomingMessage.next (/data/usercenter/node_modules/express/lib/router/index.js:199:19) at fn (/data/usercenter/node_modules/express/lib/response.js:797:25) at View.exports.renderFile [as engine] (/data/usercenter/node_modules/jade/lib/jade.js:292:14) at View.render (/data/usercenter/node_modules/express/lib/view.js:76:8)