Error to connect localhost

[swimpark]

Hello.

I recently faced a major issue after updating the Omniverse Nucleus and cache.

I can’t access the localhost of Isaac Sim 2022.2.0 in Omniverse Nucleus.

2024-02-20 18:22:13 [8,180ms] [Warning] [omni.kit.widget.filebrowser.thumbnails] Failed to stat url omniverse://localhost
2024-02-20 18:22:13 [8,180ms] [Warning] [omni.kit.widget.filebrowser.model] Error populating 'omniverse://localhost': Error listing directory 'omniverse://localhost': Result.ERROR_CONNECTION
2024-02-20 18:22:13 [8,214ms] [Warning] [omni.kit.widget.filebrowser.thumbnails] Failed to stat url omniverse://localhost
2024-02-20 18:22:15 [9,896ms] [Warning] [omni.kit.widget.filebrowser.model] Can't list directory 'omniverse://': Result.ERROR_CONNECTION
2024-02-20 18:22:15 [9,912ms] [Warning] [omni.kit.widget.filebrowser.thumbnails] Failed to stat url omniverse:
2024-02-20 18:22:15 [10,398ms] [Warning] [omni.kit.widget.filebrowser.model] Can't list directory 'omniverse://localhost': Result.ERROR_CONNECTION
2024-02-20 18:22:15 [10,416ms] [Warning] [omni.kit.widget.filebrowser.thumbnails] Failed to stat url omniverse://localhost

Looking at http://localhost:3080/, it seems like there might be an issue with Auth, but nothing is displayed in the log.

I’ve tried various methods I found through Googling, but all have failed (for example, Omniverse launch-cleanup & re-install).

These are software information.

OS: Ubuntu18.04
Local Nucleus Service ver.: 2023.2.3
Omniverse Launcher ver.:1.9.10
Cache ver. : 2023.2.3

I’ll be waiting for a response to this issue.

Thank you.

[Simplychenable]

@swimpark i am just another user, so take my input as a grain of salt. would it be possible for you to upload the launcher log in its entirety? perhaps it could provide some additional context for the mods/devs. you can find the file here: ~/.nvidia-omniverse/logs/launcher.log

also, just to help with the brainstorming, could you confirm the following:

1. you have rebooted since the clean reinstall
2. verify the issue persists if you were manually start both services (discovery services and auth) that are currently suspended
3. no network/port changes since when it was working
4. there was no error messages during the nucleus and cache update/installation

[Simplychenable]

another observation is an older Ubuntu version (recommended OS can be found here - Hardware Sizing Guide — Omniverse Nucleus latest documentation) as well as an old Isaac Sim version.

though the Isaac Sim version has little to no correlation with the nucleus services, but thought i’d bring that up while i am here; the latest should be 2023.1.1

[dlindsey]

Yes, @swimpark , please look at the recommended versions of Ubuntu. We currently test against 22.04LTS. However you will also need to make sure your discovery service is running. If this is not running, auth, core, etc, will not be found by other services.

Hardware Sizing Guide — Omniverse Nucleus latest documentation (nvidia.com)

[swimpark]

Dear @Simplychenable and @dlindsey,

Thank you for your helps.

I uploaded the file that you told me.

launcher.log (132.8 KB)

The four items that @Simplychenable commented were correctly performed.

And I was using IsaacSim normally until I updated the nucleus version, so I’m not sure if the Ubuntu version has an effect.

Is there any way to downgrade the Nucleus service?

Thank you in advance.

[swimpark]

And I downgraded Cache to ver. 2022.1.1.

Then only Auth is on error.

[dlindsey]

@swimpark you can uninstall Nucleus completely (this will leave your data intact), and you can then install the version you want through the shell with this command

omniverse-launcher://install?slug=nucleus-workstation&version=X.Y.Z (replace x.y.z with the version you want, i.e. 2023.1.1)

[swimpark]

I solved this problem by downgrading the nucleus service version !

To sum it up,

OS : Ubuntu 18.04
Omniverse launcher : 1.9.10
Local Nucleus Service : 2022.2.0
Cache : 2022.1.1
IsaacSim : 2022.2.0

Thank you everyone, and have a good day !