Conecting AWS Lambda to Redshift : Error: getaddrinfo ENOTFOUND

I created an AWS Lambda function that:

• logs onto Redshift via JDBC URL


• runs a query

Locally, using Node, I can successfully run the query:

var conString = "http://postgresqlUSER_NAME:PASSWORD@JDBC_URL”;
var r = pg.connect(conString, function(err, client) {
          
if(err) {
            
     console.log('could not connect to redshift', err);
          
}
          
// omitted due to above error

However, when I execute the function on AWS Lambda (where it's wrapped in a async#waterfall block), AWS Cloudwatch logs tell me:

could not connect to redshift { [Error: getaddrinfo ENOTFOUND] code: 'ENOTFOUND', errno: 'ENOTFOUND', syscall: 'getaddrinfo' }

Any ideas on why the address wouldn't be found when running the function in Lambda?