Reproduce by:
as dumpsgen user from /srv/deployment/dumps/dumps/xmldumps-backup run the following
dumpsgen@snapshot1010:/srv/deployment/dumps/dumps/xmldumps-backup$ /usr/bin/php7.2 /srv/mediawiki/multiversion/MWScript.php dumpBackup.php --wiki=jvwiki --full --stub --report=10 --output=file:/mnt/dumpsdata/temp/dumpsgen/jvwiki-20200520-stub-meta-history.xml.gz.inprog_tmp --output=file:/mnt/dumpsdata/temp/dumpsgen/jvwiki-20200520-stub-meta-current.xml.gz.inprog_tmp --filter=latest --output=file:/mnt/dumpsdata/temp/dumpsgen/jvwiki-20200520-stub-articles.xml.gz.inprog_tmp --filter=latest --filter=notalk --filter='namespace:!NS_USER' --skip-header --start=37324 --skip-footer --end 37326
Produces output:
MediaWiki\Revision\RevisionAccessException from line 1016 of /srv/mediawiki/php-1.35.0-wmf.31/includes/Revision/RevisionStore.php: Failed to load data blob from tt:209199: Bad data in text row 209199. #0 /srv/mediawiki/php-1.35.0-wmf.31/includes/Revision/RevisionStore.php(1244): MediaWiki\Revision\RevisionStore->loadSlotContent(Object(MediaWiki\Revision\SlotRecord), NULL, NULL, NULL, 0) #1 [internal function]: MediaWiki\Revision\RevisionStore->MediaWiki\Revision\{closure}(Object(MediaWiki\Revision\SlotRecord)) #2 /srv/mediawiki/php-1.35.0-wmf.31/includes/Revision/SlotRecord.php(307): call_user_func(Object(Closure), Object(MediaWiki\Revision\SlotRecord)) #3 /srv/mediawiki/php-1.35.0-wmf.31/includes/Revision/RevisionRecord.php(175): MediaWiki\Revision\SlotRecord->getContent() #4 /srv/mediawiki/php-1.35.0-wmf.31/includes/page/WikiPage.php(798): MediaWiki\Revision\RevisionRecord->getContent('main', 1, NULL) #5 /srv/mediawiki/php-1.35.0-wmf.31/includes/page/WikiPage.php(1056): WikiPage->getContent() #6 /srv/mediawiki/php-1.35.0-wmf.31/includes/page/WikiPage.php(1043): WikiPage->insertRedirect() #7 /srv/mediawiki/php-1.35.0-wmf.31/includes/export/XmlDumpWriter.php(244): WikiPage->getRedirectTarget() #8 /srv/mediawiki/php-1.35.0-wmf.31/includes/export/WikiExporter.php(528): XmlDumpWriter->openPage(Object(stdClass)) #9 /srv/mediawiki/php-1.35.0-wmf.31/includes/export/WikiExporter.php(474): WikiExporter->outputPageStreamBatch(Object(Wikimedia\Rdbms\ResultWrapper), Object(stdClass)) #10 /srv/mediawiki/php-1.35.0-wmf.31/includes/export/WikiExporter.php(290): WikiExporter->dumpPages('page_id >= 3732...', false) #11 /srv/mediawiki/php-1.35.0-wmf.31/includes/export/WikiExporter.php(173): WikiExporter->dumpFrom('page_id >= 3732...', false) #12 /srv/mediawiki/php-1.35.0-wmf.31/maintenance/includes/BackupDumper.php(318): WikiExporter->pagesByRange(37324, 37326, false) #13 /srv/mediawiki/php-1.35.0-wmf.31/maintenance/dumpBackup.php(82): BackupDumper->dump(1, 1) #14 /srv/mediawiki/php-1.35.0-wmf.31/maintenance/doMaintenance.php(105): DumpBackup->execute() #15 /srv/mediawiki/php-1.35.0-wmf.31/maintenance/dumpBackup.php(144): require_once('/srv/mediawiki/...') #16 /srv/mediawiki/multiversion/MWScript.php(101): require_once('/srv/mediawiki/...') #17 {main} MediaWiki\Storage\BlobAccessException from line 295 of /srv/mediawiki/php-1.35.0-wmf.31/includes/Storage/SqlBlobStore.php: Bad data in text row 209199. #0 /srv/mediawiki/php-1.35.0-wmf.31/includes/Revision/RevisionStore.php(1014): MediaWiki\Storage\SqlBlobStore->getBlob('tt:209199', 0) #1 /srv/mediawiki/php-1.35.0-wmf.31/includes/Revision/RevisionStore.php(1244): MediaWiki\Revision\RevisionStore->loadSlotContent(Object(MediaWiki\Revision\SlotRecord), NULL, NULL, NULL, 0) #2 [internal function]: MediaWiki\Revision\RevisionStore->MediaWiki\Revision\{closure}(Object(MediaWiki\Revision\SlotRecord)) #3 /srv/mediawiki/php-1.35.0-wmf.31/includes/Revision/SlotRecord.php(307): call_user_func(Object(Closure), Object(MediaWiki\Revision\SlotRecord)) #4 /srv/mediawiki/php-1.35.0-wmf.31/includes/Revision/RevisionRecord.php(175): MediaWiki\Revision\SlotRecord->getContent() #5 /srv/mediawiki/php-1.35.0-wmf.31/includes/page/WikiPage.php(798): MediaWiki\Revision\RevisionRecord->getContent('main', 1, NULL) #6 /srv/mediawiki/php-1.35.0-wmf.31/includes/page/WikiPage.php(1056): WikiPage->getContent() #7 /srv/mediawiki/php-1.35.0-wmf.31/includes/page/WikiPage.php(1043): WikiPage->insertRedirect() #8 /srv/mediawiki/php-1.35.0-wmf.31/includes/export/XmlDumpWriter.php(244): WikiPage->getRedirectTarget() #9 /srv/mediawiki/php-1.35.0-wmf.31/includes/export/WikiExporter.php(528): XmlDumpWriter->openPage(Object(stdClass)) #10 /srv/mediawiki/php-1.35.0-wmf.31/includes/export/WikiExporter.php(474): WikiExporter->outputPageStreamBatch(Object(Wikimedia\Rdbms\ResultWrapper), Object(stdClass)) #11 /srv/mediawiki/php-1.35.0-wmf.31/includes/export/WikiExporter.php(290): WikiExporter->dumpPages('page_id >= 3732...', false) #12 /srv/mediawiki/php-1.35.0-wmf.31/includes/export/WikiExporter.php(173): WikiExporter->dumpFrom('page_id >= 3732...', false) #13 /srv/mediawiki/php-1.35.0-wmf.31/maintenance/includes/BackupDumper.php(318): WikiExporter->pagesByRange(37324, 37326, false) #14 /srv/mediawiki/php-1.35.0-wmf.31/maintenance/dumpBackup.php(82): BackupDumper->dump(1, 1) #15 /srv/mediawiki/php-1.35.0-wmf.31/maintenance/doMaintenance.php(105): DumpBackup->execute() #16 /srv/mediawiki/php-1.35.0-wmf.31/maintenance/dumpBackup.php(144): require_once('/srv/mediawiki/...') #17 /srv/mediawiki/multiversion/MWScript.php(101): require_once('/srv/mediawiki/...') #18 {main}
All wikis that have not completed the stubs step and have one or more such revisions will be unable to complete stubs or any following dump steps.