```name=Error message
[Xg9SJgpAME8AAIMFtwgAAAAA] 2020-01-03 14:41:03: Fatal exception of type "WMFTimeoutException"
```
```lines=12
#0 /srv/mediawiki/php-1.35.0-wmf.11/includes/exception/MWExceptionHandler.php(200): {closure}(integer)
#1 [internal function]: MWExceptionHandler::handleError(integer, string, string, integer, array)
#2 /srv/mediawiki/php-1.35.0-wmf.11/includes/libs/rdbms/database/DatabaseMysqli.php(46): mysqli->query(string)
#3 /srv/mediawiki/php-1.35.0-wmf.11/includes/libs/rdbms/database/Database.php(1308): Wikimedia\Rdbms\DatabaseMysqli->doQuery(string)
#4 /srv/mediawiki/php-1.35.0-wmf.11/includes/libs/rdbms/database/Database.php(1226): Wikimedia\Rdbms\Database->executeQueryAttempt(string, string, boolean, string, integer)
#5 /srv/mediawiki/php-1.35.0-wmf.11/includes/libs/rdbms/database/Database.php(1162): Wikimedia\Rdbms\Database->executeQuery(string, string, integer)
#6 /srv/mediawiki/php-1.35.0-wmf.11/includes/libs/rdbms/database/Database.php(1828): Wikimedia\Rdbms\Database->query(string, string)
#7 /srv/mediawiki/php-1.35.0-wmf.11/includes/libs/rdbms/database/DBConnRef.php(68): Wikimedia\Rdbms\Database->select(array, array, array, string, array, array)
#8 /srv/mediawiki/php-1.35.0-wmf.11/includes/libs/rdbms/database/DBConnRef.php(318): Wikimedia\Rdbms\DBConnRef->__call(string, array)
#9 /srv/mediawiki/php-1.35.0-wmf.11/includes/specials/SpecialWhatLinksHere.php(185): Wikimedia\Rdbms\DBConnRef->select(array, array, array, string, array, array)
#10 /srv/mediawiki/php-1.35.0-wmf.11/includes/specials/SpecialWhatLinksHere.php(194): SpecialWhatLinksHere->{closure}(Wikimedia\Rdbms\MaintainableDBConnRef, string, string)
#11 /srv/mediawiki/php-1.35.0-wmf.11/includes/specials/SpecialWhatLinksHere.php(98): SpecialWhatLinksHere->showIndirectLinks(integer, Title, integer, integer, integer)
#12 /srv/mediawiki/php-1.35.0-wmf.11/includes/specialpage/SpecialPage.php(575): SpecialWhatLinksHere->execute(NULL)
#13 /srv/mediawiki/php-1.35.0-wmf.11/includes/specialpage/SpecialPageFactory.php(611): SpecialPage->run(NULL)
#14 /srv/mediawiki/php-1.35.0-wmf.11/includes/MediaWiki.php(298): MediaWiki\Special\SpecialPageFactory->executePath(Title, RequestContext)
#15 /srv/mediawiki/php-1.35.0-wmf.11/includes/MediaWiki.php(967): MediaWiki->performRequest()
#16 /srv/mediawiki/php-1.35.0-wmf.11/includes/MediaWiki.php(530): MediaWiki->main()
#17 /srv/mediawiki/php-1.35.0-wmf.11/index.php(46): MediaWiki->run()
#18 /srv/mediawiki/w/index.php(3): require(string)
#19 {main}
```
##### Impact
Backlink list cannot be get for this template (at least this configuration: all pages except File namespace). I don’t think may people would want to get it, though.
##### Notes
The backlink table contains ~30M rows for this template, although I don’t think more than some dozens, at most a few hundreds of pages actually use it since its [[https://commons.wikimedia.org/w/index.php?title=Template:Information&diff=374837915|decomission]] in November. (The count’s slowly but constantly shrinking since I started watching it ten days ago.) I also got some Varnish errors with `Error: 503, Backend fetch failed` before this error (I reloaded the page a couple of time in the hope it will once succeed).