I tried uploading some images for the Ashes DLC and got this error:
[48900da7] /index.php/Special:Upload MWException from line 1868 of /var/www/html/includes/filerepo/file/LocalFile.php: Could not acquire lock for 'Ashes_Tutle_Wars_DLC_1.jpg.'
Backtrace:
#0 /var/www/html/includes/filerepo/file/LocalFile.php(1147): LocalFile->lock()
#1 /var/www/html/includes/upload/UploadBase.php(706): LocalFile->upload(string, string, string, integer, array, boolean, User)
#2 /var/www/html/includes/specials/SpecialUpload.php(485): UploadBase->performUpload(string, string, boolean, User)
#3 /var/www/html/includes/specials/SpecialUpload.php(197): SpecialUpload->processUpload()
#4 /var/www/html/includes/specialpage/SpecialPage.php(384): SpecialUpload->execute(NULL)
#5 /var/www/html/includes/specialpage/SpecialPageFactory.php(553): SpecialPage->run(NULL)
#6 /var/www/html/includes/MediaWiki.php(281): SpecialPageFactory::executePath(Title, RequestContext)
#7 /var/www/html/includes/MediaWiki.php(714): MediaWiki->performRequest()
#8 /var/www/html/includes/MediaWiki.php(508): MediaWiki->main()
#9 /var/www/html/index.php(41): MediaWiki->run()
#10 {main}