Up until recently, PHP requests had no time out limit. Tim Starling [[ https://lists.wikimedia.org/pipermail/wikitech-l/2018-September/090803.html | fixed this ]]. This exposes a few problems with certain pages rendering on mobile.
[[ https://github.com/wikimedia/mediawiki-extensions-MobileFrontend/blob/master/includes/transforms/LazyImageTransform.php | LazyImageTransform ]] times out on complicated pages. Our error log says:
```
Fatal error: entire web request took longer than 60 seconds and timed out in /srv/mediawiki/php-1.32.0-wmf.20/extensions/MobileFrontend/includes/transforms/LazyImageTransform.php on line 177
```
or
```
PHP Fatal Error from line 112 of /srv/mediawiki/php-1.32.0-wmf.20/extensions/MobileFrontend/includes/MobileContext.php: entire web request took longer than 60 seconds and timed out
```
Example stacktrace:
```
#0 /srv/mediawiki/php-1.32.0-wmf.20/extensions/MobileFrontend/includes/MobileContext.php(112): NO_FUNCTION_GIVEN()
#1 /srv/mediawiki/php-1.32.0-wmf.20/extensions/MobileFrontend/includes/MobileFrontend.hooks.php(513): MobileContext::singleton()
#2 /srv/mediawiki/php-1.32.0-wmf.20/extensions/MobileFrontend/includes/MobileFrontend.hooks.php(541): MobileFrontendHooks::shouldMobileFormatSpecialPages(User)
#3 /srv/mediawiki/php-1.32.0-wmf.20/includes/Hooks.php(174): MobileFrontendHooks::onSpecialPageInitList(array)
#4 /srv/mediawiki/php-1.32.0-wmf.20/includes/Hooks.php(202): Hooks::callHook(string, array, array, NULL)
#5 /srv/mediawiki/php-1.32.0-wmf.20/includes/specialpage/SpecialPageFactory.php(281): Hooks::run(string, array)
#6 /srv/mediawiki/php-1.32.0-wmf.20/includes/specialpage/SpecialPageFactory.php(297): MediaWiki\Special\SpecialPageFactory->getPageList()
#7 /srv/mediawiki/php-1.32.0-wmf.20/includes/specialpage/SpecialPageFactory.php(662): MediaWiki\Special\SpecialPageFactory->getAliasList()
#8 /srv/mediawiki/php-1.32.0-wmf.20/includes/specialpage/SpecialPage.php(99): MediaWiki\Special\SpecialPageFactory->getLocalNameFor(string, boolean)
#9 /srv/mediawiki/php-1.32.0-wmf.20/includes/specialpage/SpecialPage.php(85): SpecialPage::getTitleValueFor(string, boolean, string)
#10 /srv/mediawiki/php-1.32.0-wmf.20/skins/MinervaNeue/includes/skins/SkinMinerva.php(620): SpecialPage::getTitleFor(string)
#11 /srv/mediawiki/php-1.32.0-wmf.20/skins/MinervaNeue/includes/skins/SkinMinerva.php(1248): SkinMinerva->getDiscoveryTools()
#12 /srv/mediawiki/php-1.32.0-wmf.20/skins/MinervaNeue/includes/skins/SkinMinerva.php(1269): SkinMinerva->getMenuData()
#13 /srv/mediawiki/php-1.32.0-wmf.20/skins/MinervaNeue/includes/skins/SkinMinerva.php(342): SkinMinerva->getSkinConfigVariables()
#14 /srv/mediawiki/php-1.32.0-wmf.20/includes/skins/SkinTemplate.php(224): SkinMinerva->initPage(OutputPage)
#15 /srv/mediawiki/php-1.32.0-wmf.20/includes/OutputPage.php(2402): SkinTemplate->outputPage()
#16 /srv/mediawiki/php-1.32.0-wmf.20/includes/MediaWiki.php(875): OutputPage->output(boolean)
#17 /srv/mediawiki/php-1.32.0-wmf.20/includes/MediaWiki.php(887): Closure$MediaWiki::main()
#18 /srv/mediawiki/php-1.32.0-wmf.20/includes/MediaWiki.php(525): MediaWiki->main()
#19 /srv/mediawiki/php-1.32.0-wmf.20/index.php(42): MediaWiki->run()
#20 /srv/mediawiki/w/index.php(3): include(string)
#21 {main}
```
Between September 10th and September 17th, there were 42 occurrences of the timed out request.