Error
Request ID: W5-PowrAADYAAAaR0bAAAACD
message
A database query error has occurred. [..]
Query: UPDATE `watchlist` SET wl_notificationtimestamp = NULL WHERE wl_user = '###' AND wl_notificationtimestamp IN ('##############', ..., '##############') AND (wl_notificationtimestamp < '##############)
Function: ClearWatchlistNotificationsJob::run
Error: 1205 Lock wait timeout exceeded; try restarting transaction (10.192.48.114)stacktrace
#2 /srv/mediawiki/php-1.32.0-wmf.20/includes/libs/rdbms/database/Database.php(2074): Wikimedia\Rdbms\Database->query(string, string) #3 /srv/mediawiki/php-1.32.0-wmf.20/includes/jobqueue/jobs/ClearWatchlistNotificationsJob.php(75): Wikimedia\Rdbms\Database->update(string, array, array, string) #4 /srv/mediawiki/php-1.32.0-wmf.20/includes/watcheditem/WatchedItemStore.php(785): ClearWatchlistNotificationsJob->run() #5 /srv/mediawiki/php-1.32.0-wmf.20/includes/deferred/MWCallableUpdate.php(34): Closure$WatchedItemStore::resetAllNotificationTimestampsForUser() #6 /srv/mediawiki/php-1.32.0-wmf.20/includes/deferred/DeferredUpdates.php(268): MWCallableUpdate->doUpdate() #7 /srv/mediawiki/php-1.32.0-wmf.20/includes/deferred/DeferredUpdates.php(214): DeferredUpdates::runUpdate(MWCallableUpdate, Wikimedia\Rdbms\LBFactoryMulti, string, integer) #8 /srv/mediawiki/php-1.32.0-wmf.20/includes/deferred/DeferredUpdates.php(134): DeferredUpdates::execute(array, string, integer) #9 /srv/mediawiki/php-1.32.0-wmf.20/includes/MediaWiki.php(914): DeferredUpdates::doUpdates(string) #10 /srv/mediawiki/php-1.32.0-wmf.20/includes/MediaWiki.php(734): MediaWiki->restInPeace(string, boolean) #11 [internal function]: Closure$MediaWiki::doPostOutputShutdown()
Notes
Happens from multiple wikis, immediately after submitting a form on Special:Watchlist. The update runs after the user receives the page response, so the error is unable to show itself to the user, which means they don't know that it failed.
See also: T134613: updateNotificationTimestamp() should batch queries