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Wikimedia Platform Engineering/MediaWiki Core Team/Check-ins/20140505

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who: Brad, Bryan, Faidon, Antoine, Tim, Chris, Dan, Chad, Rob, Greg, Timo, Ori

Monthly report

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https://www.mediawiki.org/wiki/Wikimedia_engineering_report/2014/April#Platform_Engineering


Bug escalation

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  • 58881 phpunit 4.0 distributed by phar which is unsupported by mw/core wrapper => can’t test!

Antoine: addshore did a few changes today (linked in bug report). Can use some reviews.

  • Timo / Aude stepped in already :-)

Prioritization Process

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See email: http://lists.wikimedia.org/pipermail/mediawiki-core/2014-April/000054.html

Silence == assent? +1 (bd808)

Job queue

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  • Meeting tomorrow
  • General consensus on things like better monitoring

SecurePoll

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MediaWiki/CentralAuth token names

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Varnish cache vary based on cookies matching a certain pattern. There was a prod issue last week because a new cookie was introduced that ended in “Token”, was served to anons and thus caused a lot of vary chain entries in Varnish. Faidon would like to look into changing the MW/CentralAuth token name to be more easily matched in Varnish without false positives.


Performance / HHVM

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  • Brad reviewed Tim’s LuaSandbox patch and OK’d it; Tim merged
  • Needs to be committed into hhvm-dev tree.
  • FSS / wikidiff2 won’t build against latest master.
  • Ori tied up with EventLogging migration, Vagrant sprint and Zurich presentations.
  • Quick script made to compare parser output with cache (to be run in hhvm)
    • May 22nd (v3.1? v4.0? something like that)

RCStream

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https://gerrit.wikimedia.org/r/#/c/131040/

  • Ops willing to provide operational support provided that is a comparable commitment from us to make this successful. This entails:
    • Fielding feature requests (and rejecting them, for the most part)
    • Supporting a migration from IRC to the feed
    • Misc. community-facing requirements that this setup entails
    • Ongoing maintenance of the Python code
  • Timo has stepped up and agreed to co-maintain this codebase.

Concretely, I think a commitment from our side entails the following:

  • Providing documentation sample client code
  • Make the argument for migrating from IRC and for the proposed infrastructure
  • Hold a workshop (at Wikimania, perhaps?) for bot maintainers
  • Bug triage

Why this matters: http://blog.hatnote.com/post/81329715894/a-beautifully-prepared-video-wall-installation Yeah, it’s hard to believe that wall is indirectly powered by IRC :-)

Antoine : make sure to get volunteers / bots author involved somehow :)

Deployment tooling / RelEng

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  • Deployed new highlighter to Mediawiki.org (and test, test2, testwikidata)- found two bugs! Yay!
    • Fixing bugs and adding one missing feature. Deploying that tomorrow (probably) and giving it time to soak
  • Worked with matanya on irc on Friday - says Hebrew search is worse with cirrus than before.
    • Deploying plugin specifically for Hebrew uncovered bugs mentioned above so we’ll get to round two once that is in beta.
  • Swift plugin done. Deployed to beta
    • We need swift in beta for testing
    • Can deploy to prod once new boxes are fully weighted (soon) -- will roll out slowly so we don’t kill swift.
  • Having some trouble lately getting patches into Elasticsearch
  • Want to file RFC about killing “Go” behavior from search. It’s a glorified “I’m Feeling Lucky” mode and makes me angry. Dan, can we talk?
    • Would this affect things like Firefox’s search bar?
      • It shouldn’t unless they don’t know how to write code.

Hiring

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  • YAY :)
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