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fix(weather): use stable instanceId to prevent duplicate fetchers#4092

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rejas merged 1 commit intoMagicMirrorOrg:developfrom
KristjanESPERANTO:weather
Apr 5, 2026
Merged

fix(weather): use stable instanceId to prevent duplicate fetchers#4092
rejas merged 1 commit intoMagicMirrorOrg:developfrom
KristjanESPERANTO:weather

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During the server-side migration (PR #4032), the instanceId was built with Date.now(), making it unique per client reload. This approach was fine in the old browser-based architecture where reloads cleaned up everything automatically. But now the node_helper persists across reloads, so each reconnect created a new HTTPFetcher while the old one kept polling - silently multiplying API calls over time.

The fix is simple: use this.identifier as the instanceId, which is already stable and unique per module slot. This is the same approach the Calendar module uses.

On the node_helper side, when a provider already exists for the same instanceId, we now skip re-creation and just resend WEATHER_INITIALIZED so the client picks up where it left off.

Fixes https://forum.magicmirror.builders/topic/20199

During the server-side migration (PR MagicMirrorOrg#4032), the `instanceId` was built
with `Date.now()`, making it unique per client reload. This was fine in
the old browser-based architecture where reloads cleaned up everything
automatically. But now the node_helper persists across reloads, so each
reconnect created a new `HTTPFetcher` while the old one kept polling —
silently multiplying API calls over time.

The fix is simple: use `this.identifier` as the `instanceId`, which is
already stable and unique per module slot. This is the same approach the
Calendar module uses.

On the node_helper side, when a provider already exists for the same
`instanceId`, we now skip re-creation and just resend
`WEATHER_INITIALIZED` so the client picks up where it left off.

Fixes https://forum.magicmirror.builders/topic/20199
@rejas rejas merged commit 0da343b into MagicMirrorOrg:develop Apr 5, 2026
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@KristjanESPERANTO KristjanESPERANTO deleted the weather branch April 8, 2026 17:32
klaernie added a commit to klaernie/k8s-internal that referenced this pull request Apr 26, 2026
… too often

This was fixed in MagicMirrorOrg/MagicMirror#4092 but isn't about to be
released until later this year
khassel pushed a commit that referenced this pull request Apr 27, 2026
#4113)

As reported in #4109, the weather module retries much more frequently
than expected after network errors. #4092 already fixed the main cause
(duplicate fetchers), but the backoff logic in `HTTPFetcher` still has a
gap: once retries are exhausted, `calculateBackoffDelay` keeps returning
a short fixed delay (60s) instead of falling back to `reloadInterval`.
The same problem existed for 5xx errors, where the delay grew to 8× the
configured interval.

Inspired by #4110 (thanks @CodeLine9), this PR makes both error paths
fall back to `reloadInterval` after retries are exhausted. I also
simplified the catch block, extracted a `#shortenUrl()` helper for log
messages, and added tests for the backoff progression.
@khassel khassel mentioned this pull request Apr 30, 2026
khassel added a commit that referenced this pull request Apr 30, 2026
## Release Notes
Thanks to: @cgillinger, @khassel, @KristjanESPERANTO, @sonnyb9
> ⚠️ This release needs nodejs version >=22.21.1 <23 || >=24 (no change
to previous release)

[Compare to previous Release
v2.35.0](v2.35.0...v2.36.0)

This release falls outside the quarterly schedule. We opted for an early
release due to:
- Security fix for the internal cors proxy
- API change of the weather provider smi
- Several bug fixes

### Breaking Changes

The cors proxy is now disabled by default. If required, it must be
explicitly enabled in the `config.js` file. See the
[documentation](https://docs.magicmirror.builders/configuration/cors.html).

### ⚠️ Security

You can find several publicly accessible MagicMirror² instances.

This should never be done. Doing so makes your entire configuration,
including secrets and API keys, publicly visible. Furthermore, it allows
attackers to target the host; this is only prevented beginning with this
release.

Public MagicMirror² instances should always run behind a reverse proxy
with authentication.

### [core]
- Prepare Release 2.36.0 (#4126)
- Allow HTTPFetcher to pass through 304 responses (#4120)
- fix(http-fetcher): fall back to reloadInterval after retries exhausted
(#4113)
- config endpoint must handle functions in module configs (#4106)
- fix replaceSecretPlaceholder (#4104)
- restrict replaceSecretPlaceholder to cors with allowWhitelist (#4102)
- fix: prevent crash when config is undefined in socket handler (#4096)
- fix cors function for alpine linux (#4091)
- fix(cors): prevent SSRF via DNS rebinding (#4090)
- add option to disable or restrict cors endpoint (#4087)
- fix: prevent SSRF via /cors endpoint by blocking private/reserved IPs
(#4084)
- chore: add permissions section to enforce pull-request rules workflow
(#4079)
- update version for develop

### [dependencies]
- update dependencies (#4124)
- chore: update dependencies (#4088)
- refactor: enable ESLint rule "no-unused-vars" and handle related
issues (#4080)

### [modules/newsfeed]
- fix(newsfeed): prevent duplicate parse error callback when using
pipeline (#4083)

### [modules/updatenotification]
- fix(updatenotification): harden git command execution + simplify
checkUpdates (#4115)
- fix(tests): correct import path for git_helper module in
updatenotification tests (#4078)

### [modules/weather]
- fix(weather): use nearest openmeteo hourly data (#4123)
- fix(weather): avoid loading state after reconnect (#4121)
- weather: fix UV index display and add WeatherFlow precipitation
(#4108)
- fix(weather): restore OpenWeatherMap v2.5 support (#4101)
- fix(weather): use stable instanceId to prevent duplicate fetchers
(#4092)
- SMHI: migrate to SNOW1gv1 API (replace deprecated PMP3gv2) (#4082)

### [testing]
- ci(actions): set explicit token permissions (#4114)
- fix(http_fetcher): use undici.fetch when dispatcher is present (#4097)
- ci(codeql): also scan develop branch on push and PR (#4086)
- refactor: replace implicit global config with explicit global.config
(#4085)

---------

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: sam detweiler <sdetweil@gmail.com>
Co-authored-by: Kristjan ESPERANTO <35647502+KristjanESPERANTO@users.noreply.github.com>
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