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Maniphest T323254

MediaWiki->initializeArticle on FlaggedRevs wikis triggers deprecated "Unexpected clearActionName after getActionName"
Closed, ResolvedPublicPRODUCTION ERROR
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Description

Error
In T323184#8401081, @brennen wrote:

Seeing a bunch of these (12k and counting) after rolling back to group1; think I missed this as a separate error earlier:

Error
normalized_message
[{reqId}] {exception_url}   PHP Notice: Unexpected clearActionName after getActionName already called
exception.trace
from /srv/mediawiki/php-1.40.0-wmf.10/includes/context/RequestContext.php(311)
#0 [internal function]: MWExceptionHandler::handleError(integer, string, string, integer, array)
#1 /srv/mediawiki/php-1.40.0-wmf.10/includes/context/RequestContext.php(311): trigger_error(string)
#2 /srv/mediawiki/php-1.40.0-wmf.10/includes/context/RequestContext.php(176): RequestContext->clearActionName()
#3 /srv/mediawiki/php-1.40.0-wmf.10/includes/MediaWiki.php(483): RequestContext->setTitle(Title)
#4 /srv/mediawiki/php-1.40.0-wmf.10/includes/MediaWiki.php(315): MediaWiki->initializeArticle()
#5 /srv/mediawiki/php-1.40.0-wmf.10/includes/MediaWiki.php(901): MediaWiki->performRequest()
#6 /srv/mediawiki/php-1.40.0-wmf.10/includes/MediaWiki.php(559): MediaWiki->main()
#7 /srv/mediawiki/php-1.40.0-wmf.10/index.php(50): MediaWiki->run()
#8 /srv/mediawiki/php-1.40.0-wmf.10/index.php(46): wfIndexMain()
#9 /srv/mediawiki/w/index.php(3): require(string)
#10 {main}

Searching logstash on the trace suggests that these are most of the notices.

I will likely roll back to group0 out of an abundance of caution before I go AFK for the day, just due to the volume, but I'm assuming these can also be trivially silenced.

Details

SubjectRepoBranchLines +/-
Revert "MediaWiki: Temp silence FR-induced clearActionName warnings"mediawiki/coremaster+1 -7
FlaggablePageView: Move isPageView() check outside of showingStable()mediawiki/extensions/FlaggedRevsmaster+7 -8
FlaggablePageView: Clean up redundant conditions in showingStable()mediawiki/extensions/FlaggedRevsmaster+25 -30
Revert "logspam.pl: Filter out some persistent noise"operations/puppetproduction+0 -1
action=purge is not a page viewmediawiki/extensions/FlaggedRevsmaster+1 -1
logspam.pl: Filter out some persistent noiseoperations/puppetproduction+1 -0
MediaWiki: Temp silence FR-induced clearActionName warningsmediawiki/corewmf/1.40.0-wmf.10+7 -1
MediaWiki: Temp silence FR-induced clearActionName warningsmediawiki/coremaster+7 -1
InitializeArticleMaybeRedirect hook: Improve docs & restrictmediawiki/coremaster+9 -9
InitializeArticleMaybeRedirect hook: Improve docs & restrictmediawiki/corewmf/1.40.0-wmf.10+9 -9
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Event Timeline

Krinkle triaged this task as Medium priority.Nov 17 2022, 9:14 AM
Krinkle created this task.
Restricted Application added a subscriber: Aklapper. · View Herald TranscriptNov 17 2022, 9:14 AM
Krinkle added a comment.Nov 17 2022, 9:14 AM
In T323184#8401376, @Tgr wrote:
In T323184#8401081, @brennen wrote:

Seeing a bunch of these (12k and counting) after rolling back to group1; think I missed this as a separate error earlier:

Can confirm locally. I think it happens when the action is initialized (via RequestContext::getAction or RequestContext::getActionName) in the InitializeArticleMaybeRedirect hook, but then the article is not a redirect (so the // Article may have been changed by hook branch is followed in MediaWiki::initializeArticle).
Specifically, FlaggedRevs does that via FlaggedRevsUIHooks::overrideRedirect -> FlaggablePageView::showingStable -> FlaggablePageView::isDefaultPageView as the stable version is only supposed to be shown on view and similar actions.

None of the four implementers of that hook change the article, and it doesn't seem like a reasonable thing to do, so I think that branch can just be dropped. Although that wouldn't prevent this error when FlaggedRevs is present and the page is a redirect.

gerritbot added a comment.Nov 17 2022, 9:20 AM

Change 858109 had a related patch set uploaded (by Krinkle; author: Gergő Tisza):

[mediawiki/core@master] InitializeArticleMaybeRedirect hook: Improve docs & restrict

https://gerrit.wikimedia.org/r/858109

gerritbot added a project: Patch-For-Review.Nov 17 2022, 9:20 AM
gerritbot added a comment.Nov 17 2022, 9:26 AM

Change 858226 had a related patch set uploaded (by Krinkle; author: Gergő Tisza):

[mediawiki/core@wmf/1.40.0-wmf.10] InitializeArticleMaybeRedirect hook: Improve docs & restrict

https://gerrit.wikimedia.org/r/858226

Agusbou2015 subscribed.Nov 17 2022, 1:31 PM
Krinkle moved this task from Untriaged to Nov 2022 on the Wikimedia-production-error board.Nov 17 2022, 4:15 PM
gerritbot added a comment.Nov 17 2022, 5:53 PM

Change 858226 merged by jenkins-bot:

[mediawiki/core@wmf/1.40.0-wmf.10] InitializeArticleMaybeRedirect hook: Improve docs & restrict

https://gerrit.wikimedia.org/r/858226

Stashbot added a comment.Nov 17 2022, 5:53 PM

Mentioned in SAL (#wikimedia-operations) [2022-11-17T17:53:53Z] <brennen@deploy1002> Started scap: Backport for [[gerrit:858226|InitializeArticleMaybeRedirect hook: Improve docs & restrict (T323254)]]

Stashbot added a comment.Nov 17 2022, 5:54 PM

Mentioned in SAL (#wikimedia-operations) [2022-11-17T17:54:17Z] <brennen@deploy1002> brennen and krinkle: Backport for [[gerrit:858226|InitializeArticleMaybeRedirect hook: Improve docs & restrict (T323254)]] synced to the testservers: mwdebug2001.codfw.wmnet, mwdebug1002.eqiad.wmnet, mwdebug1001.eqiad.wmnet, mwdebug2002.codfw.wmnet

Stashbot added a comment.Nov 17 2022, 5:59 PM

Mentioned in SAL (#wikimedia-operations) [2022-11-17T17:59:48Z] <brennen@deploy1002> Finished scap: Backport for [[gerrit:858226|InitializeArticleMaybeRedirect hook: Improve docs & restrict (T323254)]] (duration: 05m 55s)

ReleaseTaggerBot added a project: MW-1.40-notes (1.40.0-wmf.10; 2022-11-14).Nov 17 2022, 6:00 PM
gerritbot added a comment.Nov 17 2022, 6:11 PM

Change 858109 merged by jenkins-bot:

[mediawiki/core@master] InitializeArticleMaybeRedirect hook: Improve docs & restrict

https://gerrit.wikimedia.org/r/858109

Tgr added a comment.Nov 17 2022, 6:18 PM
In T323184#8401530, @Krinkle wrote:
In T323184#8401376, @Tgr wrote:

[…] Although that wouldn't prevent this error when FlaggedRevs is present and the page is a redirect.

Ack, this is a genuine bug imho and exactly the sort of thing we want to find. I.e. code passed around or otherwise inspected the determined action, but then later changes the title and thus the content model and associated action overriddes. Either it needs to opt-out from the title change, or needs to do so without needing to vary by action as that's recursive/paradoxal.

Conceptually, I don't think there's anything wrong here (beyond MediaWiki::initializeArticle modifying the context in the first place). FlaggedRevs checks the title and depending on what it finds redirects to a different title. Since it's the same code doing the checking and instructing the replacement of Title, it knows the old Title is temporary and there is no risk.

The fundamental problem is MediaWiki::initializeArticle modifying the context object, which is fragile as something somewhere might have cached it. (The current error triggering is somewhat arbitrary: it happens when a cached action is reset, but not when the same happens for title, user, request etc, although those all expose the same kind of risk.) I think the nice solution would be if the RequestContext was initialized in the MediaWiki class, not Setup.php, and that initialization wouldn't happen until it has determined redirects, so InitializeArticleMaybeRedirect would be passed a temporary context object. Probably not really feasible though.

The easiest way to get rid of the warning would be to change the FlaggedRevs code to use $actionFactory->getActionName( RequestContext::getMain() ) instead of RequestContext::getMain()->getActionName(), but that does feel like a hack.

Maintenance_bot removed a project: Patch-For-Review.Nov 17 2022, 6:31 PM
ReleaseTaggerBot edited projects, added MW-1.40-notes (1.40.0-wmf.12; 2022-11-28); removed MW-1.40-notes (1.40.0-wmf.10; 2022-11-14).Nov 17 2022, 7:00 PM
brennen added a comment.Nov 17 2022, 7:34 PM

Now seeing these at a much lower level on group1 than yesterday - a few hundred in 15 minutes. Manageable from an alert volume perspective, at least here. Should this block rolling to all wikis?

TheresNoTime subscribed.Nov 17 2022, 8:52 PM
gerritbot added a comment.Nov 17 2022, 9:04 PM

Change 858416 had a related patch set uploaded (by Krinkle; author: Krinkle):

[mediawiki/core@master] MediaWiki: Temp silence FR-induced clearActionName warnings

https://gerrit.wikimedia.org/r/858416

gerritbot added a project: Patch-For-Review.Nov 17 2022, 9:04 PM
Krinkle added a parent task: T314008: Promote dirty RequestContext::clearActionName to runtime warning.Nov 17 2022, 9:07 PM
gerritbot added a comment.Nov 17 2022, 10:14 PM

Change 858317 had a related patch set uploaded (by Brennen Bearnes; author: Krinkle):

[mediawiki/core@wmf/1.40.0-wmf.10] MediaWiki: Temp silence FR-induced clearActionName warnings

https://gerrit.wikimedia.org/r/858317

gerritbot added a comment.Nov 17 2022, 10:15 PM

Change 858416 merged by jenkins-bot:

[mediawiki/core@master] MediaWiki: Temp silence FR-induced clearActionName warnings

https://gerrit.wikimedia.org/r/858416

gerritbot added a comment.Nov 17 2022, 10:34 PM

Change 858317 merged by jenkins-bot:

[mediawiki/core@wmf/1.40.0-wmf.10] MediaWiki: Temp silence FR-induced clearActionName warnings

https://gerrit.wikimedia.org/r/858317

Stashbot added a comment.Nov 17 2022, 10:34 PM

Mentioned in SAL (#wikimedia-operations) [2022-11-17T22:34:31Z] <brennen@deploy1002> Started scap: Backport for [[gerrit:858317|MediaWiki: Temp silence FR-induced clearActionName warnings (T323254)]]

Stashbot added a comment.Nov 17 2022, 10:34 PM

Mentioned in SAL (#wikimedia-operations) [2022-11-17T22:34:55Z] <brennen@deploy1002> brennen and brennen: Backport for [[gerrit:858317|MediaWiki: Temp silence FR-induced clearActionName warnings (T323254)]] synced to the testservers: mwdebug2002.codfw.wmnet, mwdebug1001.eqiad.wmnet, mwdebug1002.eqiad.wmnet, mwdebug2001.codfw.wmnet

Stashbot added a comment.Nov 17 2022, 10:41 PM

Mentioned in SAL (#wikimedia-operations) [2022-11-17T22:41:48Z] <brennen@deploy1002> Finished scap: Backport for [[gerrit:858317|MediaWiki: Temp silence FR-induced clearActionName warnings (T323254)]] (duration: 07m 16s)

ReleaseTaggerBot edited projects, added MW-1.40-notes (1.40.0-wmf.10; 2022-11-14); removed MW-1.40-notes (1.40.0-wmf.12; 2022-11-28).Nov 17 2022, 11:00 PM
brennen removed a parent task: T320515: 1.40.0-wmf.10 deployment blockers.Nov 18 2022, 5:51 PM
dancy subscribed.Nov 28 2022, 8:16 PM

These errors are still trickling in at a low but noticeable rate (~15/hour).

gerritbot added a comment.Feb 9 2023, 4:28 PM

Change 888050 had a related patch set uploaded (by Ahmon Dancy; author: Ahmon Dancy):

[operations/puppet@production] logspam.pl: Filter out some persistent noise

https://gerrit.wikimedia.org/r/888050

gerritbot added a comment.Feb 10 2023, 7:32 PM

Change 888050 merged by Dzahn:

[operations/puppet@production] logspam.pl: Filter out some persistent noise

https://gerrit.wikimedia.org/r/888050

Maintenance_bot removed a project: Patch-For-Review.Feb 10 2023, 8:31 PM
Krinkle mentioned this in T314008: Promote dirty RequestContext::clearActionName to runtime warning.Jul 24 2023, 4:59 AM
gerritbot added a comment.Aug 4 2023, 9:34 PM

Change 945792 had a related patch set uploaded (by Bartosz Dziewoński; author: Bartosz Dziewoński):

[operations/puppet@production] Revert "logspam.pl: Filter out some persistent noise"

https://gerrit.wikimedia.org/r/945792

gerritbot added a project: Patch-For-Review.Aug 4 2023, 9:34 PM
gerritbot added a comment.Aug 9 2023, 5:13 PM

Change 947418 had a related patch set uploaded (by Krinkle; author: Bartosz Dziewoński):

[mediawiki/extensions/FlaggedRevs@master] action=purge is not a page view

https://gerrit.wikimedia.org/r/947418

gerritbot added a comment.Aug 9 2023, 5:17 PM

Change 947418 merged by jenkins-bot:

[mediawiki/extensions/FlaggedRevs@master] action=purge is not a page view

https://gerrit.wikimedia.org/r/947418

ReleaseTaggerBot added a project: MW-1.41-notes (1.41.0-wmf.22; 2023-08-15).Aug 9 2023, 6:00 PM
gerritbot added a comment.Aug 9 2023, 6:00 PM

Change 947426 had a related patch set uploaded (by Bartosz Dziewoński; author: Bartosz Dziewoński):

[mediawiki/extensions/FlaggedRevs@master] FlaggablePageView: Move isPageView() check outside of showingStable()

https://gerrit.wikimedia.org/r/947426

gerritbot added a comment.Aug 9 2023, 6:02 PM

Change 947427 had a related patch set uploaded (by Bartosz Dziewoński; author: Bartosz Dziewoński):

[mediawiki/core@master] Revert "MediaWiki: Temp silence FR-induced clearActionName warnings"

https://gerrit.wikimedia.org/r/947427

gerritbot added a comment.Aug 10 2023, 1:15 AM

Change 947424 had a related patch set uploaded (by Krinkle; author: Bartosz Dziewoński):

[mediawiki/extensions/FlaggedRevs@master] FlaggablePageView: Clean up redundant conditions in showingStable()

https://gerrit.wikimedia.org/r/947424

gerritbot added a comment.Aug 10 2023, 4:00 PM

Change 945792 merged by RLazarus:

[operations/puppet@production] Revert "logspam.pl: Filter out some persistent noise"

https://gerrit.wikimedia.org/r/945792

gerritbot added a comment.Aug 11 2023, 1:40 AM

Change 947424 merged by jenkins-bot:

[mediawiki/extensions/FlaggedRevs@master] FlaggablePageView: Clean up redundant conditions in showingStable()

https://gerrit.wikimedia.org/r/947424

gerritbot added a comment.Aug 11 2023, 1:41 AM

Change 947426 merged by jenkins-bot:

[mediawiki/extensions/FlaggedRevs@master] FlaggablePageView: Move isPageView() check outside of showingStable()

https://gerrit.wikimedia.org/r/947426

gerritbot added a comment.Aug 14 2023, 12:32 PM

Change 947427 merged by jenkins-bot:

[mediawiki/core@master] Revert "MediaWiki: Temp silence FR-induced clearActionName warnings"

https://gerrit.wikimedia.org/r/947427

Maintenance_bot removed a project: Patch-For-Review.Aug 14 2023, 1:11 PM
matmarex closed this task as Resolved.Aug 14 2023, 1:54 PM
matmarex claimed this task.
matmarex added a subscriber: Tgr.
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