Last modified: 2011-06-28 23:13:04 UTC
Sometimes I get a pertially unstyled page, such as today on http://www.mediawiki.org/wiki/Special:Code/MediaWiki/87555, the diff-styling was missing. - no http errors - no JS errors - no HTML/DOM exceptions http://bits.wikimedia.org/www.mediawiki.org/load.php?debug=false&lang=en&modules=site&only=styles&skin=vector line 0 undefined line 1 /* LOCAL MW.ORG STYLING HERE */@media print{ }@media handheld{ } line 2 line 3 /* cache key: mediawikiwiki:resourceloader:filter:minify-css:5:9d5d855a588ab73b56d717c4a7c9d656 */ I don't know for sure if the unstyled code review diffs is caused by this, but the "undefined" word is a bug for sure.
As usual a refresh fixes these kind of errors, but it's a bug nontheless. For what it's worth, I catched the following headers on that request: Request method: GET Status code: 304 Not Modified Cache-Control: public, max-age=300, s-maxage=300 Connection: keep-alive Date: Fri, 06 May 2011 18:14:55 GMT Expires: Fri, 06 May 2011 18:15:14 GMT Last-Modified: Wed, 04 May 2011 20:16:15 GMT Vary: Accept-Encoding Via: 1.1 varnish X-Varnish: 2004502580
Could this be related to bug #28714?
See also bug 28840 and bug 28851 ! See also problem reports at http://meta.wikimedia.org/wiki/Wikimedia_Forum#Troubles
(In reply to comment #3) > See also bug 28840 Why do you think that one is related? From what I can see, that one is an IE issue and what this bug describes it is not IE-specific.
(In reply to comment #4) > Why do you think that one is related? Blind guess while driven to distraction. I know nothing about how the Resource loader works, but there were a lot of recent bug reports describing failure to render CSS. The symptoms were driving me crazy, crazy enough to hope there might be a single cause. The temporary patch at bug 28840 has relieved my pain, so I will stop groping in the dark.
(In reply to comment #5) > The symptoms were driving me > crazy, crazy enough to hope there might be a single cause. The temporary patch > at bug 28840 has relieved my pain, so I will stop groping in the dark. We're very interested in tracking this down but we're having trouble reproducing it. Could you let us know what browser you're using? Also, I assume you're seeing this on Wiki* site, not you're own installation of Mediawiki, is that correct? If you were seeing this pretty consistently, your information would help us a lot.
(In reply to comment #6) The above linked (in comment 3) thread at Meta describes what I was seeing. I am using IE7 on Vista. Before the temporary patch at bug 28840, I was seeing the problem on "dif" pages 100% consistently at en.wikiquote. (It drove me crazy because I routinely spend 2-3 hours per day reviewing diffs at "Special:Recent changes".) This and other symptoms were only intermittent at Meta, and I am not sure whether I ever saw it at en.wikipedia. Since the patch (Oooh, the cooolooouuurs!) I have only seen the failure to render CSS three times, and refreshing the page did the trick each time. Those three (at Meta, if I recall, but one may have been at either Meta or en.wikipedia) were a content page, a diff, and Special:Recent changes itself. Clearly there is more than one thing going on. The presumed cause mentioned at http://en.wikipedia.org/wiki/Wikipedia:Wikipedia_Signpost/2011-05-09/Technology_report#In_brief does not seem to correspond to what was done in the patch.
All the bugs mentioned in the previous comments are fixed. I can no longer reproduce this, marking WORKSFORME for now.
