19274 2012-10-04 10:58:24 +0000 Investigate possible database problem 2012-10-05 04:37:12 +0000 1 1 1 Unclassified webplatform.org infrastructure unspecified PC All RESOLVED FIXED P1 critical --- 1 schepers schepers luzc rlane32 team-webplatform-admin public-webplatform-bugs oldest_to_newest 75302 0 schepers 2012-10-04 10:58:24 +0000 Chris Mills reported: [[ Can anyone tell me what happened to the CSS tutorials page and main yesterday? http://docs.webplatform.org/wiki/CSS/tutorials The page linked from the main page seems to have been changed to http://docs.webplatform.org/test/CSS/tutorials And loads of the links to CSS articles I added to the page seem to have been removed. and the main page (http://docs.webplatform.org/wiki/Meta:Main_Page) structure has been changed again. ... It is weird as when I check the history on those pages, it says the last person to make changes was me. But this can't be, as there is definitely stuff I put up there yesterday/the day before that has been removed again. ]] Karl Dubost replied: [[ I have seen db issues yesterday. So I wonder if it's related to a master slave interaction. ]] 75311 1 rlane32 2012-10-04 19:10:03 +0000 I added a database replica and changed MediaWiki's configuration to use a slave for reads and a master for writes. MediaWiki's configuration for this uses a different variable; so we went from: http://www.mediawiki.org/wiki/Manual:$wgDBserver to: http://www.mediawiki.org/wiki/Manual:$wgDBservers Apparently, MediaWiki uses $wgDBserver for some other magical settings. One of which is the default for: http://www.mediawiki.org/wiki/Manual:$wgCachePrefix With no prefix for the memcache keys, both test and current were clobbering each other's keys, including the parser cache entries. I've fixed this by explicitly setting the cache prefix, and I've also added $wgDBserver back in, in case it was used for other magical purposes. 75332 2 ssweeney 2012-10-05 04:37:12 +0000 *** Bug 19263 has been marked as a duplicate of this bug. ***