```
Exception executing job: refreshLinksPrioritized Main_Page isOpportunistic=1 requestId=Wj0YvgpEESgAAFJ0@gkAAAAC rootJobTimestamp=20171222143750 causeAction=unknown causeAgent=unknown : Wikibase\DataModel\Services\Lookup\EntityLookupException: Failed to unserialize the content object.
#0 /srv/mediawiki/php-master/extensions/Wikibase/lib/includes/Store/Sql/WikiPageEntityRevisionLookup.php(162): Wikibase\Lib\Store\Sql\WikiPageEntityRevisionLookup->loadEntityBlob(stdClass)
#1 /srv/mediawiki/php-master/extensions/Wikibase/lib/includes/Store/Sql/WikiPageEntityRevisionLookup.php(92): Wikibase\Lib\Store\Sql\WikiPageEntityRevisionLookup->loadEntity(stdClass)
#2 /srv/mediawiki/php-master/extensions/Wikibase/lib/includes/Store/DispatchingEntityRevisionLookup.php(59): Wikibase\Lib\Store\Sql\WikiPageEntityRevisionLookup->getEntityRevision(Wikibase\DataModel\Entity\ItemId, integer, string)
#3 /srv/mediawiki/php-master/extensions/Wikibase/lib/includes/Store/CachingEntityRevisionLookup.php(108): Wikibase\Lib\Store\DispatchingEntityRevisionLookup->getEntityRevision(Wikibase\DataModel\Entity\ItemId, integer, string)
#4 /srv/mediawiki/php-master/extensions/Wikibase/lib/includes/Store/CachingEntityRevisionLookup.php(91): Wikibase\Lib\Store\CachingEntityRevisionLookup->fetchEntityRevision(Wikibase\DataModel\Entity\ItemId, integer, string)
#5 /srv/mediawiki/php-master/extensions/Wikibase/lib/includes/Store/CachingEntityRevisionLookup.php(108): Wikibase\Lib\Store\CachingEntityRevisionLookup->getEntityRevision(Wikibase\DataModel\Entity\ItemId, integer, string)
#6 /srv/mediawiki/php-master/extensions/Wikibase/lib/includes/Store/CachingEntityRevisionLookup.php(91): Wikibase\Lib\Store\CachingEntityRevisionLookup->fetchEntityRevision(Wikibase\DataModel\Entity\ItemId, integer, string)
#7 /srv/mediawiki/php-master/extensions/Wikibase/lib/includes/Store/RevisionBasedEntityLookup.php(39): Wikibase\Lib\Store\CachingEntityRevisionLookup->getEntityRevision(Wikibase\DataModel\Entity\ItemId)
#8 /srv/mediawiki/php-master/vendor/wikibase/data-model-services/src/Lookup/RedirectResolvingEntityLookup.php(51): Wikibase\Lib\Store\RevisionBasedEntityLookup->getEntity(Wikibase\DataModel\Entity\ItemId)
#9 /srv/mediawiki/php-master/extensions/Wikibase/client/includes/LangLinkHandler.php(109): Wikibase\DataModel\Services\Lookup\RedirectResolvingEntityLookup->getEntity(Wikibase\DataModel\Entity\ItemId)
#10 /srv/mediawiki/php-master/extensions/Wikibase/client/includes/LangLinkHandler.php(331): Wikibase\Client\LangLinkHandler->getEntityLinks(Title)
#11 /srv/mediawiki/php-master/extensions/Wikibase/client/includes/LangLinkHandler.php(352): Wikibase\Client\LangLinkHandler->getEffectiveRepoLinks(Title, ParserOutput)
#12 /srv/mediawiki/php-master/extensions/Wikibase/client/includes/Hooks/ParserOutputUpdateHookHandlers.php(97): Wikibase\Client\LangLinkHandler->addLinksFromRepository(Title, ParserOutput)
#13 /srv/mediawiki/php-master/extensions/Wikibase/client/includes/Hooks/ParserOutputUpdateHookHandlers.php(65): Wikibase\Client\Hooks\ParserOutputUpdateHookHandlers->doContentAlterParserOutput(Title, ParserOutput)
#14 /srv/mediawiki/php-master/includes/Hooks.php(177): Wikibase\Client\Hooks\ParserOutputUpdateHookHandlers::onContentAlterParserOutput(WikitextContent, Title, ParserOutput)
#15 /srv/mediawiki/php-master/includes/Hooks.php(205): Hooks::callHook(string, array, array, NULL)
#16 /srv/mediawiki/php-master/includes/content/AbstractContent.php(520): Hooks::run(string, array)
#17 /srv/mediawiki/php-master/includes/jobqueue/jobs/RefreshLinksJob.php(231): AbstractContent->getParserOutput(Title, integer, ParserOptions, boolean)
#18 /srv/mediawiki/php-master/includes/jobqueue/jobs/RefreshLinksJob.php(126): RefreshLinksJob->runForTitle(Title)
#19 /srv/mediawiki/php-master/extensions/EventBus/JobExecutor.php(51): RefreshLinksJob->run()
#20 /srv/mediawiki/rpc/RunSingleJob.php(79): JobExecutor->execute(array)
#21 {main}
```