Due to bug 67056 (T69056), MediaViewer fails to display thumbnails on beta, unless they have already been generated in production.
Version: unspecified
Severity: normal
URL: https://i.imgur.com/1E8kvZF.png
Description
Description
Details
Details
- Reference
- bz67651
| Subject | Repo | Branch | Lines +/- | |
|---|---|---|---|---|
| Disable MediaViewer thumbnail guessing on Beta | operations/mediawiki-config | master | +4 -0 |
| Status | Subtype | Assigned | Task | ||
|---|---|---|---|---|---|
| Invalid | None | T69651 MediaViewer does not work on Beta | |||
| Open | None | T27958 thumb.php should work with ForeignAPIRepo |
Event Timeline
Comment Actions
The underlying issue is that MediaViewer thumbnail guessing does not work well with frontend caches which cache 404s (see bug 64554 fore details). That's not a problem on WMF sites which have thumbnail handlers enabled, and not a problem on other sites which have thumbnail guessing disabled by default; Beta is the exception.
We might want to just disable thumbnail guessing there; that would mean significantly different behavior on test and production, though.
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See T69056#799964 for a hypothesis of what happens. If I am correct, the underlying issue is T27958.
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Change 235361 had a related patch set uploaded (by Gergő Tisza):
Disable MediaViewer thumbnail guessing on Beta
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Mass-removing the Multimedia tag from MediaViewer tasks, as this is now being worked on by the Reading department, not Editing's Multimedia team.
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Feel free to ask :)
This was fixed with https://gerrit.wikimedia.org/r/235361 (for some value of fixed; the patch disabled a feature on beta that's used on production so it's not ideal).