==== Error ====
* mwversion: `1.39.0-wmf.8`
* reqId: `290860cd-eb20-4f4b-9617-05022c59536c`
* [[ https://logstash.wikimedia.org/app/dashboards#/view/AXFV7JE83bOlOASGccsT?_g=(time:(from:'2022-04-26T19:06:32.000Z',to:'2022-04-27T17:07:38.239Z'))&_a=(query:(query_string:(query:'reqId:%22290860cd-eb20-4f4b-9617-05022c59536c%22'))) | Find reqId in Logstash ]]
```name=normalized_message
[{reqId}] {exception_url} PHP Notice: Undefined offset: 2
```
```name=exception.trace,lines=10
from /srv/mediawiki/php-1.39.0-wmf.8/extensions/WikimediaEvents/includes/PageSplitter/PageSplitterInstrumentation.php(82)
#0 /srv/mediawiki/php-1.39.0-wmf.8/extensions/WikimediaEvents/includes/PageSplitter/PageSplitterInstrumentation.php(82): MWExceptionHandler::handleError(integer, string, string, integer, array)
#1 /srv/mediawiki/php-1.39.0-wmf.8/extensions/WikimediaEvents/includes/WebABTest/WebABTestArticleIdStrategy.php(91): WikimediaEvents\PageSplitter\PageSplitterInstrumentation->getBucket(double)
#2 /srv/mediawiki/php-1.39.0-wmf.8/skins/Vector/includes/Hooks.php(530): WikimediaEvents\WebABTest\WebABTestArticleIdStrategy->getBucket()
#3 /srv/mediawiki/php-1.39.0-wmf.8/skins/Vector/includes/Hooks.php(569): Vector\Hooks::getTocClasses(Vector\SkinVector22, GlobalVarConfig)
#4 /srv/mediawiki/php-1.39.0-wmf.8/includes/HookContainer/HookContainer.php(338): Vector\Hooks::onOutputPageBodyAttributes(OutputPage, Vector\SkinVector22, array)
#5 /srv/mediawiki/php-1.39.0-wmf.8/includes/HookContainer/HookContainer.php(137): MediaWiki\HookContainer\HookContainer->callLegacyHook(string, array, array, array)
#6 /srv/mediawiki/php-1.39.0-wmf.8/includes/HookContainer/HookRunner.php(2660): MediaWiki\HookContainer\HookContainer->run(string, array, array)
#7 /srv/mediawiki/php-1.39.0-wmf.8/includes/OutputPage.php(3345): MediaWiki\HookContainer\HookRunner->onOutputPageBodyAttributes(OutputPage, Vector\SkinVector22, array)
#8 /srv/mediawiki/php-1.39.0-wmf.8/includes/skins/SkinMustache.php(63): OutputPage->headElement(Vector\SkinVector22)
#9 /srv/mediawiki/php-1.39.0-wmf.8/includes/skins/SkinTemplate.php(161): SkinMustache->generateHTML()
#10 /srv/mediawiki/php-1.39.0-wmf.8/includes/OutputPage.php(2809): SkinTemplate->outputPage()
#11 /srv/mediawiki/php-1.39.0-wmf.8/includes/MediaWiki.php(926): OutputPage->output(boolean)
#12 /srv/mediawiki/php-1.39.0-wmf.8/includes/MediaWiki.php(939): MediaWiki::{closure}()
#13 /srv/mediawiki/php-1.39.0-wmf.8/includes/MediaWiki.php(566): MediaWiki->main()
#14 /srv/mediawiki/php-1.39.0-wmf.8/index.php(50): MediaWiki->run()
#15 /srv/mediawiki/php-1.39.0-wmf.8/index.php(46): wfIndexMain()
#16 /srv/mediawiki/w/index.php(3): require(string)
#17 {main}
```
==== Notes ====
These seem to have started Apr 26 2022 20:57:02. There have been 386 hits since then.