| BBlack | |
| Oct 7 2016, 2:41 PM |
| F4572317: 2016-10-07-143726_1389x270_scrot.png | |
| Oct 7 2016, 2:41 PM |
This the 500 rate specifically for varnish->swift requests for thumbnails (pattern doesn't exist in requests for originals):
The first non-zero sample in that graph is at 2016-08-16 09:00
The next notable bump up is somewhere in the early half of 2016-09-13
The rise to the current (highest) levels is somewhere in the early half of 2016-09-23
| Status | Subtype | Assigned | Task | ||
|---|---|---|---|---|---|
| Declined | None | T147648 Unexplained increase in thumbnail 500s | |||
| Resolved | • Gilles | T147784 Mediawiki thumbnail requests for 0px should result in http 400 not 500 |
Could be related to thumbor deployment, partial deployment was enabled on Sept 7th with https://gerrit.wikimedia.org/r/#/c/308746/ on Sept 13th on small wikis https://gerrit.wikimedia.org/r/#/c/310268/ and later in the day for commons with https://gerrit.wikimedia.org/r/#/c/310282/
Another data point, scrolling now the list of 500s I see a good chunk with size '0px' coming from user_agent": "Wikipedia/942 CFNetwork/808.0.2 Darwin/16.0.0" that could contribute to the increase
Wikipedia/942 CFNetwork/808.0.2 Darwin/16.0.0 is a user agent passed by the iOS app's WebView (which displays the article HTML). In some cases, the iOS app alters the requested thumbnail size, so it's possible there's a bug that's causing a 0px thumbnail to be requested.
I made a change to prevent the iOS app from requesting zero width thumbnails. Should go out with version 5.3.0
@JoeWalsh is there a timeline for 5.3.0 ? We're still seeing significant traffic for 0px requests
According to SoS, 5.3.0 iOS app has been shipped last week, so we should start seeing traffic for 0px requests dropping