Sending SQS message timeout

Question

I wrote an AWS lambda function in NodeJs that pulls id's off a database and queues them onto a AWS SQS queue. I had it working fine until I deployed a function to receive the messages and now the original function is not working. Here is the relevant code:

 async function sendHelper(rows) { let i; let params; let res; let sqs = new AWS.SQS({apiVersion: '2012-11-05'}); for (i = 0; i < rows.length; i++) { params = { MessageBody: rows[i].ID.toString(), QueueUrl: 'https://sqs.' + process.env.AWS_REGION_NAME + '.amazonaws.com/' + process.env.AWS_ID_SHORT + '/' + process.env.SQS_VENDPERSON_QUEUE_NAME }; res = await sqs.sendMessage(params).promise().catch(err => errorHandler(err)); console.log(res); } return null; }

The issue is that it isn't throwing an error anywhere. It just times out on the first sendMessage no matter how long you give it. I have since removed the message receiving function and the issues persists. Some additional info that might help is I have been using serverless to deploy.

I might add that the queue can be added to fine with a test NodeJS file run locally. It is only on AWS that this issues exists. — IBirle
– IBirle, Commented Jan 5, 2019 at 5:15

Guillermo Alvarez · Accepted Answer · 2019-01-05 15:20:29Z

You didn't include the rest of your lambda function but I assume your database instance is in a VPC. If so, you need to:

Place your lambda inside your VPC
Set up a VPC endpoint for SQS or NAT gateway (depending on whether you just need to access SQS only or also need to access the internet).

Key note (that I learned the hard way): When you add your lambda function to a subnet, make sure you ONLY add it to the private subnets, otherwise nothing will work.

It is going to take quite a bit of tinkering to get right, but it is doable. Here are some relevant docs:

https://docs.aws.amazon.com/lambda/latest/dg/vpc.html

and

https://aws.amazon.com/premiumsupport/knowledge-center/internet-access-lambda-function/

a more in-depth explanation of the above: stackoverflow.com/questions/52992085/…

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