Wikitech-l August 2014

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133 participants
133 discussions

Recommended viewing: talk on Cognitive Science and Design
by Derk-Jan Hartman 17 Aug '14

17 Aug '14

I just love this Google I/O 2013 talk on human perception and cognition, and its implications for interactive and visual design. It is accessible, but with a lot of information and applies very well to us I think. I'm sure that many designers know all about this and some have probably seen the clip before, but it is also very good for developers, because many of these things we know subconsciously, but it's not really part of our vocabulary. https://www.youtube.com/watch?v=z2exxj4COhU DJ

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DB deadlock on Mediawiki 1.23.2 with VisualEditor and Parsoid
by Bjoern Kahl 17 Aug '14

17 Aug '14

Dear All, I need some help tracking down a DB deadlock on a single-server, "private" Wiki installation running latest MediaWiki download from http://www.mediawiki.org/wiki/Download I have been referred to this mailing list from #mediawiki at irc.freenode.org, thanks for the pointer! Installed versions: ------------------- - MediaWiki: 1.23.2 - VisualEditor from Git, branch REL1_23, ID 9883566 - Parsoid from Git, branch REL1_23, ID 8da3673 - parsoid service from Git, branch master, ID df35443 - mysql: 5.5.35, Debian wheezy package - apache: 2.2.22, Debian wheezy package - PHP: 5.4.4, Debian wheezy package - OS: Linux 3.2.0-4-686-pae #1 SMP Debian 3.2.57-3 i686 GNU/Linux MediaWiki, Parsoid (nodejs) service and mysql database are all on the same server. Setup followed the instructions on https://www.mediawiki.org/wiki/Parsoid/Setup Problem description: -------------------- Logging in, reading and editing using the standard (not visual) edit works fine. Clicking "Edit", which starts the visual editor, results in no reaction at all for approx 5 seconds, then the page goes dim and a progress indicator appears at the top right corner. After another approx. 100 seconds, the page returns to normal state as if opened or reading. Directly accessing the Parsoid service, here running on port 8000, promptly delivers the page. Preliminary investigation: -------------------------- Enabling debugging in LocalSettings.php and tweaking wfDebugTimer() to get absolute millisecond timestamps and client address/port info in the log file showed the following sequences of activities (anonymized log files available if needed): Summarized: - client request page by calling "GET /wiki/api.php?format=json&action=visualeditor&paction=parse..." - MediaWiki starts processing and class the Parsoid service with "GET /testwiki/TestPage?oldid=4053 HTTP/1.0" - Parsoid service calls "GET /wiki/api.php?format=json&action=query&prop=revisions&..." - call from Parsoid server into MediaWiki API deadlocks with client call into API. The question is why is it deadlocking and how to prevent the deadlock. Detailed activities analysis: - (1) client accesses "GET /wiki/api.php?format=json&action=visualeditor&paction=parse..." - (2) MediaWiki starts some session bookkeeping, including opening a DB transaction with "BEGIN" and performing several queries in the transaction. - (3) MediaWiki/1.23.2 calls the parsoid service with "GET /testwiki/TestPage?oldid=4053 HTTP/1.0" - (4) Parsoid/0.1 calls "GET /wiki/api.php?format=json&action=query&prop=revisions&..." - (5) MediaWiki starts processing (in a new apache/PHP slave) and opens a new DB transaction with "BEGIN" performing the same initial "UPDATE `wiki_user` SET user_touched ..." query as first query in the transaction as in step (2). - (6) approx. 40 seconds pass - (7) Parsoid service drops connection from (4) to MediaWiki (TCP FIN packet observed by tcpdump while capturing the on-wire conversation between MediaWiki and the client / the Parsiod service) - (8) Parsoid/0.1 calls again "GET /wiki/api.php?format=json&action=query&prop=revisions&..." from a new connection (client port number changed) - (9) MediaWiki starts processing (in a new apache/PHP slave) and opens a new DB transaction with "BEGIN" performing the same initial "UPDATE `wiki_user` SET user_touched ..." query as first query in the transaction as in step (2) and (5). - (10) approx. 10 seconds pass - (11) MediaWiki receives a "SQL ERROR: Lock wait timeout exceeded; try restarting transaction" relating to transaction from step (5) - (12) MediaWiki attempts a ROLLBACK of (5) and tries to send a "HTTP 500" (content captured by tcpdump) but the connection is already dead. - (13) approx. 30 seconds pass - (14) Parsoid service drops connection from (8) to MediaWiki (TCP FIN packet observed by tcpdump while capturing the on-wire conversation between MediaWiki and the client / the Parsiod service) - (15) Parsoid/0.1 calls again "GET /wiki/api.php?format=json&action=query&prop=revisions&..." from a new connection (client port number changed) - (16) MediaWiki starts processing (in a new apache/PHP slave) and opens a new DB transaction with "BEGIN" performing the same initial "UPDATE `wiki_user` SET user_touched ..." query as first query in the transaction as in step (2), (5) and (9). - (17) approx. 10 seconds pass - (18) MediaWiki receives a "SQL ERROR: Lock wait timeout exceeded; try restarting transaction" relating to transaction from step (9) - (19) MediaWiki attempts a ROLLBACK of (9) and tries to send a "HTTP 500" (content captured by tcpdump) but the connection is already dead. - (20) approx. 10 seconds pass - (21) MediaWiki closes the connection to the Parsoid service from step (3), without any data exchange after receiving the initial "GET /testwiki/TestPage?oldid=4053 HTTP/1.0" - (22) MediaWiki performs a DB "COMMIT" in the original client session from step (2), after 104 seconds. - (23) MediaWiki continues processing the session from step (16), at least in part executing the same set of queries as in step (2). - (24) MediaWiki performs a DB "COMMIT" in the Parsoid client session from step (15), after 20 seconds. - (25) MediaWiki sends a "HTTP 200" with a JSON body to the Parsoid service as answer to request from step (15). - (26) Parsoid service logs messages "starting parsing", a parse tree and "completed parsing in 101234 ms". (Note: It is unclear when in the range (21) to (26) these messages are logged, but I think this position "(26)" is most logical.) At earlier times, Parsoid logs the two messages "Failed API request, 8 retries remaining." and "Failed API request, 7 retries remaining." and not precisely known time steps, probably between (7)/(8) and (14)/(15), respectively. Question: --------- What could cause this behavior and how should I configure my system to prevent the deadlocks? If this is a Bug in either MediWiki or the VisualEditor or Parsoid, how to further investigate and fix it? Best regards Björn -- | Bjoern Kahl +++ Siegburg +++ Germany | | "googlelogin@-my-domain-" +++ www.bjoern-kahl.de | | Languages: German, English, Ancient Latin (a bit :-)) |

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need for an app? (was: Future platforms, devices, and consumers)
by svetlana 17 Aug '14

17 Aug '14

(Duplicating this mail, as I wasn't subscribed to mobile-l a minute ago.) On Sat, 16 Aug 2014, at 12:45, Nkansah Rexford wrote: > [...] > The Wikipedia app is currently under good development and I think its doing > great. We don't need apps. We need mobile websites which work as good as an app does. Oh, the waste of effort. I truly pledge you to work together to make a website which is so good that an 'app' is redundant. svetlana

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Re: [Wikitech-l] need for an app? (was: Future platforms, devices, and consumers)
by Nkansah Rexford 16 Aug '14

16 Aug '14

I agree with you too on that. apps are redundant, unless one has the resources to support. 'Nativity' is great and can unleash some potentials, which are hard to accomplish via browsers. I personally find the mobile site for Wikipedia great enough and I use it for editing instead of the native app. rexford | google.com/+Nkansahrexford | sent from smartphone On Aug 16, 2014 9:28 AM, "svetlana" <svetlana(a)fastmail.com.au> wrote: On Sat, 16 Aug 2014, at 12:45, Nkansah Rexford wrote: > [...] > The Wikipedia app is currently under good development and I think its doing > great. We don't need apps. We need mobile websites which work as good as an app does. Oh, the waste of effort. I truly pledge you to work together to make a website which is so good that an 'app' is redundant. svetlana _______________________________________________ Wikitech-l mailing list Wikitech-l(a)lists.wikimedia.org https://lists.wikimedia.org/mailman/listinfo/wikitech-l

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Roadmap and deployment highlights - week of August 18th
by Greg Grossmeier 15 Aug '14

15 Aug '14

Hello and welcome to the latest edition of the WMF Engineering Roadmap and Deployment update. The full log of planned deployments next week can be found at: <https://wikitech.wikimedia.org/wiki/Deployments#Week_of_Aug_18th> A quick list of notable items... == Tuesday == * MediaWiki deploy ** group1 to 1.24wmf17: All non-Wikipedia sites (Wiktionary, Wikisource, Wikinews, Wikibooks, Wikiquote, Wikiversity, and a few other sites) ** <https://www.mediawiki.org/wiki/MediaWiki_1.24/wmf17> * Wikidata ** Badges support will be rolled out, see: *** <https://lists.wikimedia.org/pipermail/wikidata-l/2014-August/004331.html> ** Wikinews will get sitelinks via Wikidata (aka "Wikidata phase 1") == Wednesday == * Weekly fundraising banner test == Thursday == * MediaWiki deploy ** group2 to 1.24wmf17 (all Wikipedias) ** group0 to 1.24wmf18 (test/test2/testwikidata/mediawiki) Thanks and as always, questions and comments welcome, Greg -- | Greg Grossmeier GPG: B2FA 27B1 F7EB D327 6B8E | | identi.ca: @greg A18D 1138 8E47 FAC8 1C7D |

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PHPUnit tests in MediaWiki
by Jon Robson 15 Aug '14

15 Aug '14

Suddenly I cannot run PHPUnit tests on vagrant > cd /vagrant/mediawiki/tests/phpunit && /usr/bin/php5 phpunit.php --configuration /vagrant/mediawiki/extensions/Echo/tests/echo.suite.xml --group=Echo No MWMultiVersion instance initialized! MWScript.php wrapper not used? The documentation doesn't seem up to date... https://www.mediawiki.org/wiki/Manual:PHP_unit_testing/Running_the_unit_tes…

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Configuration related things that happened at Wikimania
by Legoktm 15 Aug '14

15 Aug '14

Hello! This past week at the hackathon we got a lot of things done related to configuration, thank you to everyone who contributed to discussions, worked on patchsets, or did code review! This is just a list of things I can remember, we did much more. Some of these aren't directly related to configuration, but will make it easier for people to use the Config classes, especially in extensions. * Converted most of includes/specials/ to use Config interface instead of globals - a bunch of patches * A bunch of other misc. classes were converted to use Config instead of globals - another bunch of patches * API modules can now be registered with factory functions to allow for dependency injection - https://gerrit.wikimedia.org/r/#/c/149183/ * Skins can now be registered with factory functions to allow for dependency injection - https://gerrit.wikimedia.org/r/#/c/153060/ * Patch for SpecialPages to use a factory function was started - https://gerrit.wikimedia.org/r/#/c/152755/ * Added a JSONContentHandler to core - https://gerrit.wikimedia.org/r/#/c/152933/ * Discussed creating a MultiConfig class to handle fallback logic - https://gerrit.wikimedia.org/r/153541 (WIP) * Created a "Configuration" component in Bugzilla * Created a tracking bug for converting things to use Config classes instead of globals - https://bugzilla.wikimedia.org/show_bug.cgi?id=config-obj If you have time, code review would be appreciated: <https://gerrit.wikimedia.org/r/#/q/topic:conf+status:open,n,z>! Thanks, -- Legoktm

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Deployment targets and preferences (was: Superprotect user right, Comming to a wiki near you)
by Seb35 14 Aug '14

14 Aug '14

Hi, I propose some constructive ideas to improve the deployment of new features: * granular deployments: create "user profiles" where the users can choose if they want an overall appearance: * "never ever change my interface": some experienced authors do not like when one change every month their workflow if they are happy with it, * "experienced editor": some experienced editors want new features or see what the newbies see, * "newbie": the newbies/editors-to-be could expect an editing environment possibly different than the reader environment, * "reader": the readers have their own expectations for easy reading, * etc. The features could be deployed only for some groups, giving more flexibility to deploy "reader features" for readers, etc. Obviously there are preferences, but the newbies have no experience about it, and the experienced editors have to be discover new preferences on a case-by-case basis, making it difficult to everybody to track the preferences. * implement global preferences (and the possibility to change locally or globally, like in Mailman) [bug 14950][] * when a new feature is introduced, propose to users (not in "never ever change my interface") if they want the new feature, locally or globally, possibly using the Notifications bar, or with some message in the prefs page and highlighting it on the prefs page * work on a better organisation of the preferences, e.g. add an exhaustive preference panel similarly to Firefox’s about:config to permit the developers to add more preferences and hence offering more customisation possibilities for advanced users, by nullifying the argument "the preferences page is too complicated for new users" * as it was proposed, add a review process for the gadgets+JS pages to avoid performance, security, usability issues, possibly with the help of the tech staff, and possibly with the general MediaWiki code review (gerrit/Phabricator) with some gateway between it and the MediaWiki websites [bug 69445][] [bug 20153][] In other words, improve the deployment targets and give easy choices to users to opt-in/opt-out/etc the new features depending on their willingness to change their environment. And although I’m neither a loudly people neither the community, I vote to remove the superprotect right and any other enforcement of this type in the future. It’s like an edit war where one party has the power to silence the other, and like all edit wars there are at least two wrong versions. [bug 69445]: https://bugzilla.wikimedia.org/show_bug.cgi?id=69445 [bug 14950]: https://bugzilla.wikimedia.org/show_bug.cgi?id=14950 [bug 20153]: https://bugzilla.wikimedia.org/show_bug.cgi?id=20153 ~ Seb35

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PHP 5.3 EOL and MediaWiki 1.24
by Tyler Romeo 14 Aug '14

14 Aug '14

Hi everybody, So we had a discussion about this a while ago, but just recently PHP let out the final 5.3 release. [0] Back in the previous thread concerning PHP 5.3, there seemed to be general agreement toward upping our PHP minimum requirements for the 1.24 release of MediaWiki. Here are the stats: * Soon Ubuntu (trusty) and Debian (jessie) releases will be running PHP 5.5 and 5.6, respectively. * MediaWiki 1.23 ends support in May 2017 * PHP 5.4 is estimated to be supported until 2015 * Ubuntu 12.04 LTS (PHP 5.3) ends support on April 26, 2017 * Debian Squeeze (PHP 5.3) ends support in February 2016 * Debian Wheezy (PHP 5.4) *might* be supported until May 2018, depending on the feedback received from the Squeeze LTS trial The results of this timeline are that when MediaWiki 1.23 ends support, most supported distros will be on PHP 5.5 or higher (yes, not 5.4, but 5.5). With that in mind, I'd like to move to raise our PHP minimum version. Unless there are people that disagree, it is no longer a question of whether to raise it or not, but rather what we want to raise it to. I believe we have a couple of options: 1) Raise to PHP 5.5 for MW 1.24 2) Raise to PHP 5.4 for MW 1.24, and then when a release with support past 2018 is made, go to 5.5. Option 2 takes advantage of the possible gap in coverage we will face should Debian Wheezy receive LTS support. Thoughts? [0] http://php.net/archive/2014.php?050329#id2014-08-14-1 *-- * *Tyler Romeo* Stevens Institute of Technology, Class of 2016 Major in Computer Science

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tomorrow: RfC/Wikimania catchup meeting
by Sumana Harihareswara 14 Aug '14

14 Aug '14

Tomorrow at 2100 UTC http://www.timeanddate.com/worldclock/fixedtime.html?hour=21&min=00&sec=0&d… , we're having an RfC/architecture meeting in #wikimedia-office on Freenode IRC https://www.mediawiki.org/wiki/Architecture_meetings/RFC_review_2014-08-13 . We'll talk about things discussed/made at Wikimania, and about some lingering next steps from previous RfC meetings. Going forward, per the process at https://www.mediawiki.org/wiki/Architecture_meetings , the architecture committee will be setting these up and announcing them. (haven't put up calendar entries/links everywhere yet about this meeting, will do later today) Sumana Harihareswara Senior Technical Writer Wikimedia Foundation

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Wikitech-l August 2014