TypeError: first argument must be a string or Buffer
    at ClientRequest.OutgoingMessage.write (http.js:714:11)
    at sendHttpRequest (/root/myapp/node_modules/ql.io-app/node_modules/ql.io-console/node_modules/ql.io-engine/lib/engine/http/request.js:318:23)
    at sendMessage (/root/myapp/node_modules/ql.io-app/node_modules/ql.io-console/node_modules/ql.io-engine/lib/engine/http/request.js:420:9)
    at Object.exports.send (/root/myapp/node_modules/ql.io-app/node_modules/ql.io-console/node_modules/ql.io-engine/lib/engine/http/request.js:83:5)
    at send (/root/myapp/node_modules/ql.io-app/node_modules/ql.io-console/node_modules/ql.io-engine/lib/engine/source/verb.js:647:13)
    at module.exports.exec.async.parallel.ret.headers.content-type (/root/myapp/node_modules/ql.io-app/node_modules/ql.io-console/node_modules/ql.io-engine/lib/engine/source/verb.js:362:25)
    at async.parallel.results (/root/myapp/node_modules/ql.io-app/node_modules/ql.io-console/node_modules/ql.io-engine/node_modules/async/lib/async.js:454:21)
    at _asyncMap (/root/myapp/node_modules/ql.io-app/node_modules/ql.io-console/node_modules/ql.io-engine/node_modules/async/lib/async.js:185:13)
    at async.forEach (/root/myapp/node_modules/ql.io-app/node_modules/ql.io-console/node_modules/ql.io-engine/node_modules/async/lib/async.js:86:13)
    at Array.forEach (native)
Error: connect ECONNREFUSED
    at errnoException (net.js:768:11)
    at Object.afterConnect [as oncomplete] (net.js:759:19)
Error: connect ECONNREFUSED
    at errnoException (net.js:768:11)
    at Object.afterConnect [as oncomplete] (net.js:759:19)
error: Error: connect ECONNREFUSED
    at errnoException (net.js:768:11)
    at Object.afterConnect [as oncomplete] (net.js:759:19)
Uncaught error
Error: connect ECONNREFUSED
    at errnoException (net.js:768:11)
    at Object.afterConnect [as oncomplete] (net.js:759:19)
Error: socket hang up
    at createHangUpError (http.js:1263:15)
    at Socket.socketCloseListener (http.js:1314:23)
    at Socket.EventEmitter.emit (events.js:115:20)
    at Socket._destroy.destroyed (net.js:356:10)
    at process.startup.processNextTick.process._tickCallback (node.js:244:9)
Error: socket hang up
    at createHangUpError (http.js:1263:15)
    at Socket.socketCloseListener (http.js:1314:23)
    at Socket.EventEmitter.emit (events.js:115:20)
    at Socket._destroy.destroyed (net.js:356:10)
    at process.startup.processNextTick.process._tickCallback (node.js:244:9)
error: Error: socket hang up
    at createHangUpError (http.js:1263:15)
    at Socket.socketCloseListener (http.js:1314:23)
    at Socket.EventEmitter.emit (events.js:115:20)
    at Socket._destroy.destroyed (net.js:356:10)
    at process.startup.processNextTick.process._tickCallback (node.js:244:9)
Uncaught error
Error: socket hang up
    at createHangUpError (http.js:1263:15)
    at Socket.socketCloseListener (http.js:1314:23)
    at Socket.EventEmitter.emit (events.js:115:20)
    at Socket._destroy.destroyed (net.js:356:10)
    at process.startup.processNextTick.process._tickCallback (node.js:244:9)