Deleting a backup off a NAS does not refresh HA list

[dcmeglio]

The problem

Setup automatic backups to copy to a NAS.
Run a backup.
-File created on NAS-
Go on NAS and delete that file
Note the list in HA still lists the file even though it doesn't exist. Restarting HA doesn't seem to help.

It you attempt to download the file, it attempts to (and fails to) download a txt file that does not exist.

What version of Home Assistant Core has the issue?

2025.1.0b2

What was the last working version of Home Assistant Core?

NA, new feature

What type of installation are you running?

Home Assistant OS

Integration causing the issue

backup

Link to integration documentation on our website

https://www.home-assistant.io/integrations/backup/

Diagnostics information

No response

Example YAML snippet

No response

Anything in the logs that might be useful for us?

Logger: aiohttp.server
Source: /usr/local/lib/python3.13/site-packages/aiohttp/web_protocol.py:451
First occurred: 11:08:17 AM (3 occurrences)
Last logged: 11:13:03 AM

Error handling request
Traceback (most recent call last):
  File "/usr/local/lib/python3.13/site-packages/aiohttp/web_protocol.py", line 480, in _handle_request
    resp = await request_handler(request)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.13/site-packages/aiohttp/web_app.py", line 569, in _handle
    return await handler(request)
           ^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.13/site-packages/aiohttp/web_middlewares.py", line 117, in impl
    return await handler(request)
           ^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/src/homeassistant/homeassistant/components/http/security_filter.py", line 92, in security_filter_middleware
    return await handler(request)
           ^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/src/homeassistant/homeassistant/components/http/forwarded.py", line 83, in forwarded_middleware
    return await handler(request)
           ^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/src/homeassistant/homeassistant/components/http/request_context.py", line 26, in request_context_middleware
    return await handler(request)
           ^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/src/homeassistant/homeassistant/components/http/ban.py", line 86, in ban_middleware
    return await handler(request)
           ^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/src/homeassistant/homeassistant/components/http/auth.py", line 242, in auth_middleware
    return await handler(request)
           ^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/src/homeassistant/homeassistant/components/http/headers.py", line 32, in headers_middleware
    response = await handler(request)
               ^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/src/homeassistant/homeassistant/helpers/http.py", line 73, in handle
    result = await handler(request, **request.match_info)
             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/src/homeassistant/homeassistant/components/backup/http.py", line 66, in get
    stream = await agent.async_download_backup(backup_id)
             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/src/homeassistant/homeassistant/components/hassio/backup.py", line 137, in async_download_backup
    return await self._client.backups.download_backup(
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    ...<2 lines>...
    )
    ^
  File "/usr/local/lib/python3.13/site-packages/aiohasupervisor/backups.py", line 147, in download_backup
    result = await self._client.get(
             ^^^^^^^^^^^^^^^^^^^^^^^
    ...<4 lines>...
    )
    ^
  File "/usr/local/lib/python3.13/site-packages/aiohasupervisor/client.py", line 163, in get
    return await self._request(
           ^^^^^^^^^^^^^^^^^^^^
    ...<5 lines>...
    )
    ^
  File "/usr/local/lib/python3.13/site-packages/aiohasupervisor/client.py", line 129, in _request
    await self._raise_on_status(response)
  File "/usr/local/lib/python3.13/site-packages/aiohasupervisor/client.py", line 77, in _raise_on_status
    raise exc_type()
aiohasupervisor.exceptions.SupervisorNotFoundError

Supervisor log says:

2024-12-28 11:15:15.148 INFO (MainThread) [supervisor.api.backups] Downloading backup a9200a81

Which a9200a81.txt is the file it attempts to download

### Additional information

_No response_

[home-assistant]

Hey there @home-assistant/core, mind taking a look at this issue as it has been labeled with an integration (backup) you are listed as a code owner for? Thanks!

Code owner commands

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• @home-assistant close Closes the issue.
• @home-assistant rename Awesome new title Renames the issue.
• @home-assistant reopen Reopen the issue.
• @home-assistant unassign backup Removes the current integration label and assignees on the issue, add the integration domain after the command.
• @home-assistant add-label needs-more-information Add a label (needs-more-information, problem in dependency, problem in custom component) to the issue.
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---

backup documentation
backup source
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[def1149]

Confirmed when the backup is on a Windows share

[zadigre]

same problem here.
also deleting backup stored in a samba share from the backup list doesn't do anything.
problem still present with 2025.1.0 b3

[agners]

Hm, yeah the Supervisor does cache the backup information. There is no event from the (network) file system, and continuously polling would not be good for traffic/IO load. The Core should probably handle this better/differently.

What you can do is use ha backup realod in the CLI to ask Supervisor to (re)check all backup files on disk and network mounts.

[home-assistant]

Hey there @home-assistant/supervisor, mind taking a look at this issue as it has been labeled with an integration (hassio) you are listed as a code owner for? Thanks!

Code owner commands

Code owners of hassio can trigger bot actions by commenting:

• @home-assistant close Closes the issue.
• @home-assistant rename Awesome new title Renames the issue.
• @home-assistant reopen Reopen the issue.
• @home-assistant unassign hassio Removes the current integration label and assignees on the issue, add the integration domain after the command.
• @home-assistant add-label needs-more-information Add a label (needs-more-information, problem in dependency, problem in custom component) to the issue.
• @home-assistant remove-label needs-more-information Remove a label (needs-more-information, problem in dependency, problem in custom component) on the issue.

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---

hassio documentation
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[dcmeglio]

It could at least do this as part of HA startup, even restarting HA doesn't cause it to get updated. It could also, once it learns a file has been deleted (e.g. because I tried to download it and it's not there) it could give a user friendly error and at least delete that one from the cache. That would at least provide a better UX than the current downloading an invalid txt file. At least the user would know what's going on.