nginx 502 Bad Gateway with parse & send grid

Posted on May 10, 2016

Nginx

By tanzeelrana

Hey guys,

I am trying to migrate my parse application over to digital ocean and followed this guide :

https://www.digitalocean.com/community/tutorials/how-to-migrate-a-parse-app-to-parse-server-on-ubuntu-14-04

Everything works perfectly fine until I get to the very end Test Parse Server ( Executing Example Cloud Code ) section

I tested the cloud code for the sample cloud code that was provided in the tutorial :

Parse.Cloud.define('hello', function(req, res) {
  res.success('Hi');
});

so I got a Hi back in my browser as well as in postman. Then I test the function that uses sendgrid’s service to send emails :

var sendgrid = require("sendgrid");
sendgrid.initialize("sendgridAccountSid", "sendgridAuthToken");

Parse.Cloud.define("mySendGridFunction", function(request, response) {
  sendgrid.sendEmail({
    to: "community@parse.com",
    from: "sendgrid@parse.com",
    subject: "Hello from Cloud Code!",
    text: "Using Parse and SendGrid is great!"
  }, {
    success: function(httpResponse) { response.success("Email sent!"); },
    error: function(httpResponse) { response.error("Uh oh, something went wrong"); }
  });
});

now this function returns me a nginx 502 Error sometimes and sometimes it returns me with internal server error

<html>
    <head>
        <title>502 Bad Gateway</title>
    </head>
    <body bgcolor="white">
        <center>
            <h1>502 Bad Gateway</h1>
        </center>
        <hr>
        <center>nginx/1.4.6 (Ubuntu)</center>

    </body>

</html>
<!-- a padding to disable MSIE and Chrome friendly error page -->
<!-- a padding to disable MSIE and Chrome friendly error page -->
<!-- a padding to disable MSIE and Chrome friendly error page -->
<!-- a padding to disable MSIE and Chrome friendly error page -->
<!-- a padding to disable MSIE and Chrome friendly error page -->
<!-- a padding to disable MSIE and Chrome friendly error page -->

I went into my droplet to view the error.log file for nginx and this is the error I get there :

2016/05/09 20:15:26 [error] 31786#0: *68 connect() failed (111: Connection refused) while connecting to upstream, client: 159.203.7.41, server: test.pacecouriers.com, request: "POST /parse/functions/mySendGridFunction HTTP/1.1", upstream: "http://127.0.0.1:1337/functions/mySendGridFunction", host: "test.pacecouriers.com"

I kept looking around and I somewhere in between got a 301 parmanently moved error too and now my calls to the hello function are also not working and return me a 502 Bad Gateway error on all the requests to my nginx that I set up for my parse app on the droplet. Can someone please help me.

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