MediaWiki internal error.

Original exception: [aDbv1KD8SdM7hA-62gjoqwAAxC8] /index.php?title=Template:National_Criminal_Justice_reference Wikimedia\Rdbms\DBQueryDisconnectedError: A database query error has occurred. Did you forget to run your application's database schema updater after upgrading or after adding a new extension?

Please see https://www.mediawiki.org/wiki/Special:MyLanguage/Manual:Upgrading and https://www.mediawiki.org/wiki/Special:MyLanguage/Manual:How_to_debug for more information.

A connection error occurred during a query.
Query: SELECT page_id,page_namespace,page_title,page_is_redirect,page_is_new,page_latest,page_touched,page_len,page_content_model FROM `page` WHERE ((page_namespace = 0 AND page_title = 'NCJ_(identifier)'))
Function: LinkHolderArray::replaceInternal
Error: 2006 MySQL server has gone away

Backtrace:
from /home/alclark_7305/wiki.alsresume.com/includes/libs/rdbms/database/Database.php(1201)
#0 /home/alclark_7305/wiki.alsresume.com/includes/libs/rdbms/database/Database.php(1187): Wikimedia\Rdbms\Database->getQueryException(string, integer, string, string)
#1 /home/alclark_7305/wiki.alsresume.com/includes/libs/rdbms/database/Database.php(1161): Wikimedia\Rdbms\Database->getQueryExceptionAndLog(string, integer, string, string)
#2 /home/alclark_7305/wiki.alsresume.com/includes/libs/rdbms/database/Database.php(652): Wikimedia\Rdbms\Database->reportQueryError(string, integer, string, string, boolean)
#3 /home/alclark_7305/wiki.alsresume.com/includes/libs/rdbms/database/Database.php(1350): Wikimedia\Rdbms\Database->query(Wikimedia\Rdbms\Query, string)
#4 /home/alclark_7305/wiki.alsresume.com/includes/libs/rdbms/database/DBConnRef.php(119): Wikimedia\Rdbms\Database->select(array, array, array, string, array, array)
#5 /home/alclark_7305/wiki.alsresume.com/includes/libs/rdbms/database/DBConnRef.php(351): Wikimedia\Rdbms\DBConnRef->__call(string, array)
#6 /home/alclark_7305/wiki.alsresume.com/includes/libs/rdbms/querybuilder/SelectQueryBuilder.php(729): Wikimedia\Rdbms\DBConnRef->select(array, array, array, string, array, array)
#7 /home/alclark_7305/wiki.alsresume.com/includes/parser/LinkHolderArray.php(212): Wikimedia\Rdbms\SelectQueryBuilder->fetchResultSet()
#8 /home/alclark_7305/wiki.alsresume.com/includes/parser/LinkHolderArray.php(152): LinkHolderArray->replaceInternal(string)
#9 /home/alclark_7305/wiki.alsresume.com/includes/parser/Parser.php(5084): LinkHolderArray->replace(string)
#10 /home/alclark_7305/wiki.alsresume.com/includes/parser/Parser.php(1716): MediaWiki\Parser\Parser->replaceLinkHoldersPrivate(string)
#11 /home/alclark_7305/wiki.alsresume.com/includes/parser/Parser.php(725): MediaWiki\Parser\Parser->internalParseHalfParsed(string, boolean, boolean)
#12 /home/alclark_7305/wiki.alsresume.com/includes/content/WikitextContentHandler.php(376): MediaWiki\Parser\Parser->parse(string, MediaWiki\Title\Title, ParserOptions, boolean, boolean, integer)
#13 /home/alclark_7305/wiki.alsresume.com/includes/content/ContentHandler.php(1663): WikitextContentHandler->fillParserOutput(WikitextContent, MediaWiki\Content\Renderer\ContentParseParams, MediaWiki\Parser\ParserOutput)
#14 /home/alclark_7305/wiki.alsresume.com/includes/content/Renderer/ContentRenderer.php(67): ContentHandler->getParserOutput(WikitextContent, MediaWiki\Content\Renderer\ContentParseParams)
#15 /home/alclark_7305/wiki.alsresume.com/includes/Revision/RenderedRevision.php(259): MediaWiki\Content\Renderer\ContentRenderer->getParserOutput(WikitextContent, MediaWiki\Title\Title, MediaWiki\Revision\RevisionStoreRecord, ParserOptions, boolean)
#16 /home/alclark_7305/wiki.alsresume.com/includes/Revision/RenderedRevision.php(232): MediaWiki\Revision\RenderedRevision->getSlotParserOutputUncached(WikitextContent, boolean)
#17 /home/alclark_7305/wiki.alsresume.com/includes/Revision/RevisionRenderer.php(226): MediaWiki\Revision\RenderedRevision->getSlotParserOutput(string, array)
#18 /home/alclark_7305/wiki.alsresume.com/includes/Revision/RevisionRenderer.php(164): MediaWiki\Revision\RevisionRenderer->combineSlotOutput(MediaWiki\Revision\RenderedRevision, ParserOptions, array)
#19 [internal function]: MediaWiki\Revision\RevisionRenderer->MediaWiki\Revision\{closure}(MediaWiki\Revision\RenderedRevision, array)
#20 /home/alclark_7305/wiki.alsresume.com/includes/Revision/RenderedRevision.php(199): call_user_func(Closure, MediaWiki\Revision\RenderedRevision, array)
#21 /home/alclark_7305/wiki.alsresume.com/includes/poolcounter/PoolWorkArticleView.php(91): MediaWiki\Revision\RenderedRevision->getRevisionParserOutput()
#22 /home/alclark_7305/wiki.alsresume.com/includes/poolcounter/PoolWorkArticleViewCurrent.php(107): MediaWiki\PoolCounter\PoolWorkArticleView->renderRevision()
#23 /home/alclark_7305/wiki.alsresume.com/includes/poolcounter/PoolCounterWork.php(171): MediaWiki\PoolCounter\PoolWorkArticleViewCurrent->doWork()
#24 /home/alclark_7305/wiki.alsresume.com/includes/page/ParserOutputAccess.php(328): MediaWiki\PoolCounter\PoolCounterWork->execute()
#25 /home/alclark_7305/wiki.alsresume.com/includes/page/Article.php(760): MediaWiki\Page\ParserOutputAccess->getParserOutput(WikiPage, ParserOptions, MediaWiki\Revision\RevisionStoreRecord, integer)
#26 /home/alclark_7305/wiki.alsresume.com/includes/page/Article.php(563): Article->generateContentOutput(MediaWiki\User\User, ParserOptions, integer, MediaWiki\Output\OutputPage, array)
#27 /home/alclark_7305/wiki.alsresume.com/includes/actions/ViewAction.php(78): Article->view()
#28 /home/alclark_7305/wiki.alsresume.com/includes/actions/ActionEntryPoint.php(733): ViewAction->show()
#29 /home/alclark_7305/wiki.alsresume.com/includes/actions/ActionEntryPoint.php(510): MediaWiki\Actions\ActionEntryPoint->performAction(Article, MediaWiki\Title\Title)
#30 /home/alclark_7305/wiki.alsresume.com/includes/actions/ActionEntryPoint.php(145): MediaWiki\Actions\ActionEntryPoint->performRequest()
#31 /home/alclark_7305/wiki.alsresume.com/includes/MediaWikiEntryPoint.php(199): MediaWiki\Actions\ActionEntryPoint->execute()
#32 /home/alclark_7305/wiki.alsresume.com/index.php(58): MediaWiki\MediaWikiEntryPoint->run()
#33 {main}

Exception caught inside exception handler: [aDbv1KD8SdM7hA-62gjoqwAAxC8] /index.php?title=Template:National_Criminal_Justice_reference Wikimedia\Rdbms\DBConnectionError: Cannot access the database: MySQL server has gone away (mysql.alsresume.com)
Backtrace:
from /home/alclark_7305/wiki.alsresume.com/includes/libs/rdbms/loadbalancer/LoadBalancer.php(1138)
#0 /home/alclark_7305/wiki.alsresume.com/includes/libs/rdbms/loadbalancer/LoadBalancer.php(815): Wikimedia\Rdbms\LoadBalancer->reportConnectionError()
#1 /home/alclark_7305/wiki.alsresume.com/includes/libs/rdbms/loadbalancer/LoadBalancer.php(782): Wikimedia\Rdbms\LoadBalancer->getServerConnection(integer, string, integer)
#2 /home/alclark_7305/wiki.alsresume.com/includes/libs/rdbms/database/DBConnRef.php(99): Wikimedia\Rdbms\LoadBalancer->getConnectionInternal(integer, array, string, integer)
#3 /home/alclark_7305/wiki.alsresume.com/includes/libs/rdbms/database/DBConnRef.php(117): Wikimedia\Rdbms\DBConnRef->ensureConnection()
#4 /home/alclark_7305/wiki.alsresume.com/includes/libs/rdbms/database/DBConnRef.php(425): Wikimedia\Rdbms\DBConnRef->__call(string, array)
#5 /home/alclark_7305/wiki.alsresume.com/includes/cache/LinkBatch.php(379): Wikimedia\Rdbms\DBConnRef->makeWhereFrom2d(array, string, string)
#6 /home/alclark_7305/wiki.alsresume.com/includes/cache/LinkBatch.php(334): MediaWiki\Cache\LinkBatch->constructSet(string, Wikimedia\Rdbms\DBConnRef)
#7 /home/alclark_7305/wiki.alsresume.com/includes/cache/LinkBatch.php(242): MediaWiki\Cache\LinkBatch->doQuery()
#8 /home/alclark_7305/wiki.alsresume.com/includes/cache/LinkBatch.php(216): MediaWiki\Cache\LinkBatch->executeInto(MediaWiki\Cache\LinkCache)
#9 /home/alclark_7305/wiki.alsresume.com/includes/skins/Skin.php(559): MediaWiki\Cache\LinkBatch->execute()
#10 /home/alclark_7305/wiki.alsresume.com/includes/skins/Skin.php(382): Skin->preloadExistence()
#11 /home/alclark_7305/wiki.alsresume.com/includes/skins/SkinTemplate.php(172): Skin->initPage(MediaWiki\Output\OutputPage)
#12 /home/alclark_7305/wiki.alsresume.com/includes/Output/OutputPage.php(3004): SkinTemplate->outputPage()
#13 /home/alclark_7305/wiki.alsresume.com/includes/exception/MWExceptionRenderer.php(189): MediaWiki\Output\OutputPage->output()
#14 /home/alclark_7305/wiki.alsresume.com/includes/exception/MWExceptionRenderer.php(106): MWExceptionRenderer::reportHTML(Wikimedia\Rdbms\DBQueryDisconnectedError)
#15 /home/alclark_7305/wiki.alsresume.com/includes/exception/MWExceptionHandler.php(133): MWExceptionRenderer::output(Wikimedia\Rdbms\DBQueryDisconnectedError, integer)
#16 /home/alclark_7305/wiki.alsresume.com/includes/exception/MWExceptionHandler.php(237): MWExceptionHandler::report(Wikimedia\Rdbms\DBQueryDisconnectedError)
#17 /home/alclark_7305/wiki.alsresume.com/includes/MediaWikiEntryPoint.php(221): MWExceptionHandler::handleException(Wikimedia\Rdbms\DBQueryDisconnectedError, string)
#18 /home/alclark_7305/wiki.alsresume.com/includes/actions/ActionEntryPoint.php(82): MediaWiki\MediaWikiEntryPoint->handleTopLevelError(Wikimedia\Rdbms\DBQueryDisconnectedError)
#19 /home/alclark_7305/wiki.alsresume.com/includes/MediaWikiEntryPoint.php(205): MediaWiki\Actions\ActionEntryPoint->handleTopLevelError(Wikimedia\Rdbms\DBQueryDisconnectedError)
#20 /home/alclark_7305/wiki.alsresume.com/index.php(58): MediaWiki\MediaWikiEntryPoint->run()
#21 {main}