Data sources hang with Node >=12.11.0

[clstokes]

After upgrading to macOS Catalina my Pulumi applications that use data sources (e.g. aws.getAmi()) hang on these data sources call and never complete.

Downgrading to Node 10 (LTS) resolves this.

Output

% uname -a
Darwin Camerons-MacBook-Pro.local 19.0.0 Darwin Kernel Version 19.0.0: Wed Sep 25 20:18:50 PDT 2019; root:xnu-6153.11.26~2/RELEASE_X86_64 x86_64
% pulumi version
v1.2.0
% node -v
v12.11.1
% pulumi up
Previewing update (dev):

     Type                 Name                       Plan        Info
     pulumi:pulumi:Stack  demo-aws-ts-webserver-dev  running...  about to invoke

Repro code

import * as aws from "@pulumi/aws";
import * as awsx from "@pulumi/awsx";

console.log("about to invoke");

export const amiId = aws.getAmi({
    owners: ["099720109477"], // Ubuntu
    mostRecent: true,
    filters: [
        { name: "name", values: ["ubuntu/images/hvm-ssd/ubuntu-bionic-18.04-amd64-server-*"] },
    ],
}).id;

console.log("after ami");

/**
 * Resources
 */
const privateNetwork = "10.0.0.0/16";

// create a vpc
const vpc = new awsx.ec2.Vpc("web-vpc", {
    numberOfAvailabilityZones: 1,
    subnets: [{ type: "public" }],
    tags: {
        Name: "web-vpc",
    }
});

console.log("after vpc");

// create a security group
const webSg = new aws.ec2.SecurityGroup("web-firewall", {
    vpcId: vpc.id,
    name: "web-firewall",
    ingress: [
        { protocol: "tcp", fromPort: 80, toPort: 80, cidrBlocks: [privateNetwork] },
    ],
});

console.log("after websg");

const webServer = new aws.ec2.Instance("web-server", {
    tags: {
        "project": "demo",
        "Name": "web-server",
    },
    instanceType: aws.ec2.T2InstanceMedium,
    associatePublicIpAddress: false,
    ami: amiId,                   // reference from "./ami"
    subnetId: vpc.publicSubnetIds[0], // reference the subnet created by awsx
    vpcSecurityGroupIds: [webSg.id],  // reference the group created above
});

console.log("after webserver");

export const instanceIp = webServer.publicIp;

[lukehoban]

We’ve heard reports of this on CentOS as well - so this does not appear to be limited to Catalina.

[lukehoban]

I confirmed that for at least one test program, the hangs occur on >=12.11.0, but not on 12.10.0. So it appears there is some change specifically in Node 12.11.0 that triggered this.

[lukehoban]

Link to changelog for Node 12.11.0. If we could build a repro outside of Pulumi - it's theoretically possible we could report and get this fixed in Node for a future patch release.

https://github.com/nodejs/node/blob/master/doc/changelogs/CHANGELOG_V12.md#2019-09-25-version-12110-current-bridgear

[CyrusNajmabadi]

Fixed with #3325.

Customers running into this should upgrade their Pulumi to the latest version and should use @pulumi/pulumi v1.3.2 or higher.

Note: because @pulumi/pulumi can be pulled in from multiple places in a project, ensure your lock file isn't pinning this to an older version in some other package (i.e. through @pulumi/aws or @pulumi/awsx).