Theia Blueprint does not start on macOS. Maybe an IPv6 issue?

[kittaakos]

Bug Description:

We have received reports of non-functional Theia electron apps from multiple users:

• Arduino IDE is stuck on loading arduino/arduino-ide#1708
• IDE hangs on startup in macOS GUI mode arduino/arduino-ide#1527

Our users were friendly to help us, and they could reproduce the bug with the TheiaBlueprint application.

Relevant stack traces:

2022-11-25 18:27:24 root ERROR Failed to start the backend application:
2022-11-25 18:27:24 root ERROR Error: getaddrinfo ENOTFOUND localhost
    at GetAddrInfoReqWrap.onlookup [as oncomplete] (node:dns:71:26)
2022-11-25 18:27:24 root ERROR Uncaught Exception: 
2022-11-25 18:27:24 root ERROR Error: getaddrinfo ENOTFOUND localhost
    at GetAddrInfoReqWrap.onlookup [as oncomplete] (node:dns:71:26)

root ERROR Failed to start the backend application: root ERROR Error: listen EADDRNOTAVAIL: address not available 127.0.0.1 at Server.setupListenHandle [as _listen2] (node:net:1298:21) at listenInCluster (node:net:1363:12) at GetAddrInfoReqWrap.doListen [as callback] (node:net:1501:7) at GetAddrInfoReqWrap.onlookup [as oncomplete] (node:dns:73:8) root ERROR Uncaught Exception: root ERROR Error: listen EADDRNOTAVAIL: address not available 127.0.0.1 at Server.setupListenHandle [as _listen2] (node:net:1298:21) at listenInCluster (node:net:1363:12) at GetAddrInfoReqWrap.doListen [as callback] (node:net:1501:7) at GetAddrInfoReqWrap.onlookup [as oncomplete] (node:dns:73:8)

We do not yet know what's causing the problem, but we managed to figure out that disabling the IPv6 support on macOS fixes the issue:

sudo networksetup -setv6off Wi-Fi

Steps to Reproduce:

1. Download and start the latest Theia Blueprint app,
2. Sometimes, it does not start

Additional Information

• Operating System: macOS 11+ and 12+
• Theia Version: TheiaBlueprint, Version 1.31.1 (1.31.1.86)

---

I could not reproduce the bug on my macOS env. I will investigate the issue further and update this issue. If anybody has the seem issue, please let us know.

[marcdumais-work]

@kittaakos I have no specific reason to believe it will fix the issue, but we have a new macOS package available for Blueprint, based on Theia 1.32.0:

https://download.eclipse.org/theia/latest/macos/

[zhekch]

Newest package doesn't fix the issue.

S.2022-11-30.at.08.45.01.mp4

[vince-fugnitto]

The issue at first glance looks similar to #11578, is there an issue with localhost not being properly binded, or the loopback address somehow being messed up?

[kittaakos]

Closing in favor of #11578.