When rolling wmf.16 out onto test wikis this appeared in logstash.
The exception is not user facing, but would likely result in mentions / mention notifications failing.
You can easily reproduce with an edit such as: https://test.wikipedia.org/w/index.php?title=Wikipedia_talk:Foo&oldid=341564
Logstash examples:
- beta: https://logstash-beta.wmflabs.org/app/kibana#/doc/logstash-*/logstash-2018.01.10/mediawiki?id=AWDffh1oD39XhxSlxyzV
- prod https://logstash.wikimedia.org/app/kibana#/doc/logstash-*/logstash-2018.01.10/mediawiki/?id=AWDfgQSbyCJQER2bIyW0
[WlUvtQpAMEMAACjJwl8AAADM] /w/api.php MediaWiki\Storage\RevisionAccessException from line 217 of /srv/mediawiki/php-1.31.0-wmf.16/includes/Storage/RevisionStore.php: Could not determine title for page ID 182836 and revision ID 303638
#0 /srv/mediawiki/php-1.31.0-wmf.16/includes/Storage/RevisionStore.php(1714): MediaWiki\Storage\RevisionStore->getTitle(integer, integer) #1 /srv/mediawiki/php-1.31.0-wmf.16/includes/Revision.php(926): MediaWiki\Storage\RevisionStore->getPreviousRevision(MediaWiki\Storage\RevisionStoreRecord) #2 /srv/mediawiki/php-1.31.0-wmf.16/extensions/Echo/includes/DiscussionParser.php(24): Revision->getPrevious() #3 /srv/mediawiki/php-1.31.0-wmf.16/extensions/Echo/Hooks.php(553): EchoDiscussionParser::generateEventsForRevision(Revision) #4 /srv/mediawiki/php-1.31.0-wmf.16/includes/deferred/MWCallableUpdate.php(30): Closure$EchoHooks::onPageContentSaveComplete() #5 /srv/mediawiki/php-1.31.0-wmf.16/includes/deferred/DeferredUpdates.php(259): MWCallableUpdate->doUpdate() #6 /srv/mediawiki/php-1.31.0-wmf.16/includes/deferred/DeferredUpdates.php(210): DeferredUpdates::runUpdate(MWCallableUpdate, Wikimedia\Rdbms\LBFactoryMulti, string, integer) #7 /srv/mediawiki/php-1.31.0-wmf.16/includes/deferred/DeferredUpdates.php(131): DeferredUpdates::execute(array, string, integer) #8 /srv/mediawiki/php-1.31.0-wmf.16/includes/MediaWiki.php(900): DeferredUpdates::doUpdates(string) #9 /srv/mediawiki/php-1.31.0-wmf.16/includes/MediaWiki.php(720): MediaWiki->restInPeace(string, boolean) #10 [internal function]: Closure$MediaWiki::doPostOutputShutdown() #11 {main}
This is similar to T183505 T183550 T183717 T183716 T183548 which appeared to have their underlying issue fixed in https://gerrit.wikimedia.org/r/#/c/400577/