Assets not caching via isaacsim.asset.browser.cache.json

[SeanYeatts-GTI]

Description

Problem Definition

I am attempting to work with the local asset library. A terminal error indicates a failure to load the isaacsim.asset.browser.cache.json resource expected by omni.kit.browser.folder.core.models.folder_browser_model. Notably, neither the file itself nor the cache sub-folder (where it should live) exist.

Steps to Recreate

These steps come directly from the Setup Tips documentation (I am using my own asset path definition).

1. Launch Isaac Sim with the persistent asset flag.

./isaac-sim.sh --/persistent/isaac/asset_root/default="/home/kiosk-user/isaac-sim/Assets/Isaac/5.1"

2. Within the Isaac Sim GUI, navigate to the Isaac Sim Assets tab.
3. Click the gear icon at the right-hand side of the tab.
4. Select Check Default Assets Root Path. (Note that the assets seem to be found correctly, as indicated by the popup message).
5. After some variable amount of time, an error is thrown as shown in the "Logs" section of this issue. These errors continue for each top-level asset folder (ex: Environments, IsaacLab, etc).

Observations

Per the first line of each error message in the attached logs, it appears that the AWS server is still being polled even though I'm supposed to be working with local assets...

Isaac Sim version

5.1.0

Operating System (OS)

Ubuntu 22.04

GPU Name

NVIDIA GeForce RTX 4080

GPU Driver and CUDA versions

Driver 580.95.05, CUDA 12.8

Logs

[8.149s] app ready
[10.065s] Isaac Sim Full App is loaded.
[25.664s] Checking for Isaac Sim Assets...
[25.680s] Isaac Sim Assets found: /home/kiosk-user/isaac-sim/Assets/Isaac/5.1/Isaac
2025-10-31T21:18:03Z [432,038ms] [Error] [omni.kit.browser.folder.core.models.folder_browser_model] Exception when traverse: https://omniverse-content-production.s3-us-west-2.amazonaws.com/Assets/Isaac/5.1/Isaac/Environments, [Errno 2] No such file or directory: '/home/kiosk-user/isaac-sim/5.1/exts/isaacsim.asset.browser/cache/isaacsim.asset.browser.cache.json'
2025-10-31T21:18:03Z [432,038ms] [Error] [omni.kit.browser.folder.core.models.folder_browser_model] [omni.ui.tests.compare] Traceback:
Traceback (most recent call last):
  File "/home/kiosk-user/.local/share/ov/data/Kit/Isaac-Sim Full/5.1/exts/3/omni.kit.browser.folder.core-1.10.10/omni/kit/browser/folder/core/models/folder_browser_model.py", line 694, in _run
    done = await folder.start_traverse(on_connected_fn=self.__on_server_connected)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/kiosk-user/.local/share/ov/data/Kit/Isaac-Sim Full/5.1/exts/3/omni.kit.browser.folder.core-1.10.10/omni/kit/browser/folder/core/models/folder_browser_data.py", line 306, in start_traverse
    await self._traverse_folder_async(self.url)
  File "/home/kiosk-user/.local/share/ov/data/Kit/Isaac-Sim Full/5.1/exts/3/omni.kit.browser.folder.core-1.10.10/omni/kit/browser/folder/core/models/folder_browser_data.py", line 445, in _traverse_folder_async
    self._on_traverse_async_done()
  File "/home/kiosk-user/.local/share/ov/data/Kit/Isaac-Sim Full/5.1/exts/3/omni.kit.browser.folder.core-1.10.10/omni/kit/browser/folder/core/models/folder_browser_data.py", line 506, in _on_traverse_async_done
    self._on_traverse_done_fn(self, loading_completed=loading_completed, updated=self.has_update)
  File "/home/kiosk-user/.local/share/ov/data/Kit/Isaac-Sim Full/5.1/exts/3/omni.kit.browser.folder.core-1.10.10/omni/kit/browser/folder/core/models/tree_folder_browser_model.py", line 243, in _on_folder_traversed
    self._save_data_to_json(folder)
  File "/home/kiosk-user/.local/share/ov/data/Kit/Isaac-Sim Full/5.1/exts/3/omni.kit.browser.folder.core-1.10.10/omni/kit/browser/folder/core/models/folder_browser_model.py", line 628, in _save_data_to_json
    with open(self._json_file, 'w') as json_file:
         ^^^^^^^^^^^^^^^^^^^^^^^^^^
FileNotFoundError: [Errno 2] No such file or directory: '/home/kiosk-user/isaac-sim/5.1/exts/isaacsim.asset.browser/cache/isaacsim.asset.browser.cache.json'

2025-10-31T21:19:41Z [529,648ms] [Error] [omni.kit.browser.folder.core.models.folder_browser_model] Exception when traverse: https://omniverse-content-production.s3-us-west-2.amazonaws.com/Assets/Isaac/5.1/Isaac/IsaacLab, [Errno 2] No such file or directory: '/home/kiosk-user/isaac-sim/5.1/exts/isaacsim.asset.browser/cache/isaacsim.asset.browser.cache.json'
2025-10-31T21:19:41Z [529,649ms] [Error] [omni.kit.browser.folder.core.models.folder_browser_model] [omni.ui.tests.compare] Traceback:
Traceback (most recent call last):
  File "/home/kiosk-user/.local/share/ov/data/Kit/Isaac-Sim Full/5.1/exts/3/omni.kit.browser.folder.core-1.10.10/omni/kit/browser/folder/core/models/folder_browser_model.py", line 694, in _run
    done = await folder.start_traverse(on_connected_fn=self.__on_server_connected)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/kiosk-user/.local/share/ov/data/Kit/Isaac-Sim Full/5.1/exts/3/omni.kit.browser.folder.core-1.10.10/omni/kit/browser/folder/core/models/folder_browser_data.py", line 306, in start_traverse
    await self._traverse_folder_async(self.url)
  File "/home/kiosk-user/.local/share/ov/data/Kit/Isaac-Sim Full/5.1/exts/3/omni.kit.browser.folder.core-1.10.10/omni/kit/browser/folder/core/models/folder_browser_data.py", line 445, in _traverse_folder_async
    self._on_traverse_async_done()
  File "/home/kiosk-user/.local/share/ov/data/Kit/Isaac-Sim Full/5.1/exts/3/omni.kit.browser.folder.core-1.10.10/omni/kit/browser/folder/core/models/folder_browser_data.py", line 506, in _on_traverse_async_done
    self._on_traverse_done_fn(self, loading_completed=loading_completed, updated=self.has_update)
  File "/home/kiosk-user/.local/share/ov/data/Kit/Isaac-Sim Full/5.1/exts/3/omni.kit.browser.folder.core-1.10.10/omni/kit/browser/folder/core/models/tree_folder_browser_model.py", line 243, in _on_folder_traversed
    self._save_data_to_json(folder)
  File "/home/kiosk-user/.local/share/ov/data/Kit/Isaac-Sim Full/5.1/exts/3/omni.kit.browser.folder.core-1.10.10/omni/kit/browser/folder/core/models/folder_browser_model.py", line 628, in _save_data_to_json
    with open(self._json_file, 'w') as json_file:
         ^^^^^^^^^^^^^^^^^^^^^^^^^^
FileNotFoundError: [Errno 2] No such file or directory: '/home/kiosk-user/isaac-sim/5.1/exts/isaacsim.asset.browser/cache/isaacsim.asset.browser.cache.json'

2025-10-31T21:19:47Z [535,981ms] [Warning] [omni.kit.browser.folder.core.models.folder_browser_data] Cannot list https://omniverse-content-production.s3-us-west-2.amazonaws.com/Assets/Isaac/5.1/Isaac/Materials/vMaterials_2/Metal//.thumbs/256x256/, error code: Result.ERROR_NOT_FOUND.

Additional information

Note the warning at the end of the logs, indicating there may be a missing material asset altogether?

[SeanYeatts-GTI]

If I disable my internet connection and perform the same procedure as outlined in the issue description, I still get AWS connection attempts. Of course, they are unsuccessful.

[8.550s] app ready
2025-10-31T21:31:11Z [9,307ms] [Warning] [omni.kit.widget.cache_indicator.cache_state_menu] Failed to check if new version is available: Cannot connect to host api.ngc.nvidia.com:443 ssl:default [Temporary failure in name resolution]
2025-10-31T21:31:11Z [9,313ms] [Warning] [omni.kit.widget.cache_indicator.cache_state_menu] Failed to check if new version is available: Cannot connect to host api.ngc.nvidia.com:443 ssl:default [Temporary failure in name resolution]
2025-10-31T21:31:12Z [10,259ms] [Warning] [omni.kit.widget.cache_indicator.cache_state_menu] Failed to check if new version is available: Cannot connect to host api.ngc.nvidia.com:443 ssl:default [Temporary failure in name resolution]
[10.497s] Isaac Sim Full App is loaded.
[27.873s] Checking for Isaac Sim Assets...
[27.891s] Isaac Sim Assets found: /home/kiosk-user/isaac-sim/Assets/Isaac/5.1/Isaac
2025-10-31T21:32:30Z [88,292ms] [Warning] [omni.kit.browser.folder.core.models.folder_browser_data] Invalid URL: https://omniverse-content-production.s3-us-west-2.amazonaws.com/Assets/Isaac/5.1/Isaac/Robots
2025-10-31T21:32:55Z [113,434ms] [Warning] [omni.kit.browser.folder.core.models.folder_browser_data] Cannot list https://omniverse-content-production.s3-us-west-2.amazonaws.com/Assets/Isaac/5.1/Isaac/Robots/, error code: Result.ERROR_CONNECTION.
2025-10-31T21:32:55Z [113,442ms] [Warning] [omni.kit.browser.folder.core.models.folder_browser_data] Invalid URL: https://omniverse-content-production.s3-us-west-2.amazonaws.com/Assets/Isaac/5.1/Isaac/Environments
2025-10-31T21:33:21Z [139,821ms] [Warning] [omni.kit.browser.folder.core.models.folder_browser_data] Cannot list https://omniverse-content-production.s3-us-west-2.amazonaws.com/Assets/Isaac/5.1/Isaac/Environments/, error code: Result.ERROR_CONNECTION.
2025-10-31T21:33:21Z [139,821ms] [Warning] [omni.kit.browser.folder.core.models.folder_browser_data] Invalid URL: https://omniverse-content-production.s3-us-west-2.amazonaws.com/Assets/Isaac/5.1/Isaac/IsaacLab
2025-10-31T21:33:48Z [167,004ms] [Warning] [omni.kit.browser.folder.core.models.folder_browser_data] Cannot list https://omniverse-content-production.s3-us-west-2.amazonaws.com/Assets/Isaac/5.1/Isaac/IsaacLab/, error code: Result.ERROR_CONNECTION.
2025-10-31T21:33:48Z [167,018ms] [Warning] [omni.kit.browser.folder.core.models.folder_browser_data] Invalid URL: https://omniverse-content-production.s3-us-west-2.amazonaws.com/Assets/Isaac/5.1/Isaac/Materials