=== Error ===
Request ID: `W7KoHArAIEAAALCQVJQAAABU `
```name=message
Failed to load data blob from tt:106822: Failed to load blob from address tt:106822
```
```name=exception,lines=10
MediaWiki\Storage\RevisionAccessException:
Failed to load data blob from tt:106822
#0 /srv/mediawiki/php-1.32.0-wmf.23/includes/Storage/RevisionStore.php(1350): MediaWiki\Storage\RevisionStore->loadSlotContent(MediaWiki\Storage\SlotRecord, NULL, NULL, NULL, integer)
#1 [internal function]: Closure$MediaWiki\Storage\RevisionStore::emulateMainSlot_1_29#2(MediaWiki\Storage\SlotRecord)
#2 /srv/mediawiki/php-1.32.0-wmf.23/includes/Storage/SlotRecord.php(306): call_user_func(Closure$MediaWiki\Storage\RevisionStore::emulateMainSlot_1_29#2;519, MediaWiki\Storage\SlotRecord)
#3 /srv/mediawiki/php-1.32.0-wmf.23/includes/Storage/RevisionRecord.php(174): MediaWiki\Storage\SlotRecord->getContent()
#4 /srv/mediawiki/php-1.32.0-wmf.23/includes/Revision/RenderedRevision.php(205): MediaWiki\Storage\RevisionRecord->getContent(string, integer, NULL)
#5 /srv/mediawiki/php-1.32.0-wmf.23/includes/Revision/RevisionRenderer.php(169): MediaWiki\Revision\RenderedRevision->getSlotParserOutput(string)
#6 /srv/mediawiki/php-1.32.0-wmf.23/includes/Revision/RevisionRenderer.php(122): MediaWiki\Revision\RevisionRenderer->combineSlotOutput(MediaWiki\Revision\RenderedRevision, array)
#7 [internal function]: Closure$MediaWiki\Revision\RevisionRenderer::getRenderedRevision#2(MediaWiki\Revision\RenderedRevision, array)
#8 /srv/mediawiki/php-1.32.0-wmf.23/includes/Revision/RenderedRevision.php(176): call_user_func(Closure$MediaWiki\Revision\RevisionRenderer::getRenderedRevision#2;723, MediaWiki\Revision\RenderedRevision, array)
#9 /srv/mediawiki/php-1.32.0-wmf.23/includes/poolcounter/PoolWorkArticleView.php(188): MediaWiki\Revision\RenderedRevision->getRevisionParserOutput()
#10 /srv/mediawiki/php-1.32.0-wmf.23/includes/poolcounter/PoolCounterWork.php(123): PoolWorkArticleView->doWork()
#11 /srv/mediawiki/php-1.32.0-wmf.23/includes/page/Article.php(771): PoolCounterWork->execute()
#12 /srv/mediawiki/php-1.32.0-wmf.23/includes/actions/ViewAction.php(68): Article->view()
#13 /srv/mediawiki/php-1.32.0-wmf.23/includes/MediaWiki.php(501): ViewAction->show()
#14 /srv/mediawiki/php-1.32.0-wmf.23/includes/MediaWiki.php(294): MediaWiki->performAction(Article, Title)
#15 /srv/mediawiki/php-1.32.0-wmf.23/includes/MediaWiki.php(868): MediaWiki->performRequest()
#16 /srv/mediawiki/php-1.32.0-wmf.23/includes/MediaWiki.php(525): MediaWiki->main()
#17 /srv/mediawiki/php-1.32.0-wmf.23/index.php(42): MediaWiki->run()
```
```previous.exception
MediaWiki\Storage\BlobAccessException:
Failed to load blob from address tt:106822
#0 /srv/mediawiki/php-1.32.0-wmf.23/includes/Storage/RevisionStore.php(1433): MediaWiki\Storage\SqlBlobStore->getBlob(string, integer)
#1 /srv/mediawiki/php-1.32.0-wmf.23/includes/Storage/RevisionStore.php(1350): MediaWiki\Storage\RevisionStore->loadSlotContent(MediaWiki\Storage\SlotRecord, NULL, NULL, NULL, integer)
#2 [internal function]: Closure$MediaWiki\Storage\RevisionStore::emulateMainSlot_1_29#2(MediaWiki\Storage\SlotRecord)
#3 /srv/mediawiki/php-1.32.0-wmf.23/includes/Storage/SlotRecord.php(306): call_user_func(Closure$MediaWiki\Storage\RevisionStore::emulateMainSlot_1_29#2;519, MediaWiki\Storage\SlotRecord)
#4 /srv/mediawiki/php-1.32.0-wmf.23/includes/Storage/RevisionRecord.php(174): MediaWiki\Storage\SlotRecord->getContent()
#5 /srv/mediawiki/php-1.32.0-wmf.23/includes/Revision/RenderedRevision.php(205): MediaWiki\Storage\RevisionRecord->getContent(string, integer, NULL)
#6 /srv/mediawiki/php-1.32.0-wmf.23/includes/Revision/RevisionRenderer.php(169): MediaWiki\Revision\RenderedRevision->getSlotParserOutput(string)
#7 /srv/mediawiki/php-1.32.0-wmf.23/includes/Revision/RevisionRenderer.php(122): MediaWiki\Revision\RevisionRenderer->combineSlotOutput(MediaWiki\Revision\RenderedRevision, array)
#8 [internal function]: Closure$MediaWiki\Revision\RevisionRenderer::getRenderedRevision#2(MediaWiki\Revision\RenderedRevision, array)
#9 /srv/mediawiki/php-1.32.0-wmf.23/includes/Revision/RenderedRevision.php(176): call_user_func(Closure$MediaWiki\Revision\RevisionRenderer::getRenderedRevision#2;723, MediaWiki\Revision\RenderedRevision, array)
#10 /srv/mediawiki/php-1.32.0-wmf.23/includes/poolcounter/PoolWorkArticleView.php(188): MediaWiki\Revision\RenderedRevision->getRevisionParserOutput()
#11 /srv/mediawiki/php-1.32.0-wmf.23/includes/poolcounter/PoolCounterWork.php(123): PoolWorkArticleView->doWork()
#12 /srv/mediawiki/php-1.32.0-wmf.23/includes/page/Article.php(771): PoolCounterWork->execute()
#13 /srv/mediawiki/php-1.32.0-wmf.23/includes/actions/ViewAction.php(68): Article->view()
#14 /srv/mediawiki/php-1.32.0-wmf.23/includes/MediaWiki.php(501): ViewAction->show()
#15 /srv/mediawiki/php-1.32.0-wmf.23/includes/MediaWiki.php(294): MediaWiki->performAction(Article, Title)
#16 /srv/mediawiki/php-1.32.0-wmf.23/includes/MediaWiki.php(868): MediaWiki->performRequest()
#17 /srv/mediawiki/php-1.32.0-wmf.23/includes/MediaWiki.php(525): MediaWiki->main()
#18 /srv/mediawiki/php-1.32.0-wmf.23/index.php(42): MediaWiki->run()
```
== Notes ===
The fatal RevisionAccessException exception happens during the building of a page view in MediaWiki for both unregistered users and logged-in users. Triaging as at least High priority given it exposes a fatal error on a public GET url, which is a risk for false alarms and increased load.
The error seems to be nested behind a related problem that is handled, but then re-throws. The above `previous.exception` happens first, and then re-throws as RevisionAccessException, which is is currently unhandled by any UI layer and results in the top-level error handling reporting is as an application problem.
{F26270506}
Seems to be a regression that started with 1.32.0-wmf.19. (I didn't find matches among messages from previous versions). Although it is much more frequent on wmf.22 than on wmf.20 and wmf.19.
Just speculating as to why it is growing, but:
* It might mean that the same pages are receiving more traffic than before, or;
* It could be that the same problem is slowly affecting a growing number of pages, or;
* It could be that another bug was introduced last week that made it affect more pages.
{F26270546}
Consistently reproducible at `https://os.wikipedia.org/wiki/1888`.
See also: {T184693}, {T184690}, {T198869}.