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Maniphest T188555

Notice: Undefined property: stdClass::$rc_timestamp in /srv/mediawiki/php-1.31.0-wmf.23/includes/specials/SpecialNewpages.php
Closed, ResolvedPublicPRODUCTION ERROR
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Description

Saw this notice increase dramatically with the wmf.23 to group1

Details

SubjectRepoBranchLines +/-
NewPagesPages: Use array_merge rather than + for RC query info fieldsmediawiki/corewmf/1.31.0-wmf.23+2 -2
NewPagesPages: Use array_merge rather than + for RC query info fieldsmediawiki/coremaster+2 -2
Customize query in gerrit

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Event Timeline

thcipriani created this task.Feb 28 2018, 9:59 PM
Restricted Application added a subscriber: Aklapper. · View Herald TranscriptFeb 28 2018, 9:59 PM
greg added a project: MediaWiki-Special-pages.Feb 28 2018, 10:03 PM
thcipriani added a comment.Feb 28 2018, 10:08 PM

Evidently this means that all pages in Special:Newpages default to the current time:

rc_timestamp.png (578×599 px, 143 KB)

Krinkle added a project: MediaWiki-Recent-changes.Feb 28 2018, 10:09 PM
Stashbot subscribed.Feb 28 2018, 10:11 PM

Mentioned in SAL (#wikimedia-operations) [2018-02-28T22:11:33Z] <thcipriani@tin> rebuilt and synchronized wikiversions files: Group1 back to 1.31.0-wmf.22 T188555

thcipriani added a comment.Feb 28 2018, 10:15 PM

Stacktrace:

#0 /srv/mediawiki/php-1.31.0-wmf.23/includes/specials/SpecialNewpages.php(327): MWExceptionHandler::handleError(integer, string, string, integer, array)
#1 /srv/mediawiki/php-1.31.0-wmf.23/includes/specials/pagers/NewPagesPager.php(140): SpecialNewpages->formatRow(stdClass)
#2 /srv/mediawiki/php-1.31.0-wmf.23/includes/pager/IndexPager.php(445): NewPagesPager->formatRow(stdClass)
#3 /srv/mediawiki/php-1.31.0-wmf.23/includes/specials/SpecialNewpages.php(159): IndexPager->getBody()
#4 /srv/mediawiki/php-1.31.0-wmf.23/includes/specialpage/SpecialPage.php(522): SpecialNewpages->execute(NULL)
#5 /srv/mediawiki/php-1.31.0-wmf.23/includes/specialpage/SpecialPageFactory.php(579): SpecialPage->run(NULL)
#6 /srv/mediawiki/php-1.31.0-wmf.23/includes/MediaWiki.php(288): SpecialPageFactory::executePath(Title, RequestContext)
#7 /srv/mediawiki/php-1.31.0-wmf.23/includes/MediaWiki.php(861): MediaWiki->performRequest()
#8 /srv/mediawiki/php-1.31.0-wmf.23/includes/MediaWiki.php(524): MediaWiki->main()
#9 /srv/mediawiki/php-1.31.0-wmf.23/index.php(42): MediaWiki->run()
#10 /srv/mediawiki/w/index.php(3): require(string)
#11 {main}

This is also happening in another spot, let me see if I can find a trace for that one.

thcipriani added a comment.Feb 28 2018, 10:18 PM

Here's the 2nd one:

#0 /srv/mediawiki/php-1.31.0-wmf.23/includes/specials/SpecialNewpages.php(472): MWExceptionHandler::handleError(integer, string, string, integer, array, array)
#1 /srv/mediawiki/php-1.31.0-wmf.23/includes/specials/SpecialNewpages.php(455): SpecialNewpages->feedItem(stdClass)
#2 /srv/mediawiki/php-1.31.0-wmf.23/includes/specials/SpecialNewpages.php(140): SpecialNewpages->feed(string)
#3 /srv/mediawiki/php-1.31.0-wmf.23/includes/specialpage/SpecialPage.php(522): SpecialNewpages->execute(NULL)
#4 /srv/mediawiki/php-1.31.0-wmf.23/includes/specialpage/SpecialPageFactory.php(579): SpecialPage->run(NULL)
#5 /srv/mediawiki/php-1.31.0-wmf.23/includes/MediaWiki.php(288): SpecialPageFactory::executePath(Title, RequestContext)
#6 /srv/mediawiki/php-1.31.0-wmf.23/includes/MediaWiki.php(861): MediaWiki->performRequest()
#7 /srv/mediawiki/php-1.31.0-wmf.23/includes/MediaWiki.php(524): MediaWiki->main()
#8 /srv/mediawiki/php-1.31.0-wmf.23/index.php(42): MediaWiki->run()
#9 /srv/mediawiki/w/index.php(3): include(string)
#10 {main}
Krinkle assigned this task to Anomie.EditedFeb 28 2018, 10:22 PM
Krinkle triaged this task as High priority.
Krinkle subscribed.

Looking at rMW27c61fb1e94d: Add `actor` table and code to start using it it seems like the most likely commit to have caused this.

Before
$fields = [
		'rc_namespace', 'rc_title', 'rc_cur_id', 'rc_user', 'rc_user_text',
		'rc_timestamp', 'rc_patrolled', 'rc_id', 'rc_deleted',
		'length' => 'page_len', 'rev_id' => 'page_latest',
		'rc_this_oldid',
		'page_namespace', 'page_title'
After
$rcQuery = RecentChange::getQueryInfo();//  = [ 'rc_namespace', 'rc_timestamp', ... ];
$fields = [
	'length' => 'page_len', 'rev_id' => 'page_latest', 'page_namespace', 'page_title'
] + $rcQuery['fields'];

Seems like the + operator strikes again, by being used for an array that is not limited to associative entries. As such, I'd expect the 'page_namespace', 'page_title' entries to overwrite the first two entries from getQueryInfo, including rc_timestamp.

thcipriani added a parent task: T183962: 1.31.0-wmf.23 deployment blockers.Feb 28 2018, 10:23 PM
greg raised the priority of this task from High to Unbreak Now!.Feb 28 2018, 11:20 PM
greg subscribed.

@Krinkle by triaging to High instead of UBN! should I interpret that as meaning that you don't think this should be a deployment blocker? It looks like one to me (and we rolled back because of it).

I'm setting to UBN, feel free to tell me I'm wrong and why.

Restricted Application added subscribers: Liuxinyu970226, TerraCodes. · View Herald TranscriptFeb 28 2018, 11:20 PM
Ladsgroup subscribed.Mar 1 2018, 12:23 AM
• Mholloway subscribed.Mar 1 2018, 12:25 AM
Nikerabbit subscribed.Mar 1 2018, 7:00 AM
Anomie added a comment.Mar 1 2018, 1:30 PM

Unfortunate timing that this showed up just after 5pm my time. No one else wanted to fix it before my morning?

gerritbot subscribed.Mar 1 2018, 1:30 PM

Change 415558 had a related patch set uploaded (by Anomie; owner: Anomie):
[mediawiki/core@master] NewPagesPages: Use array_merge rather than + for RC query info fields

https://gerrit.wikimedia.org/r/415558

gerritbot added a project: Patch-For-Review.Mar 1 2018, 1:30 PM
gerritbot added a comment.Mar 1 2018, 2:35 PM

Change 415558 merged by jenkins-bot:
[mediawiki/core@master] NewPagesPages: Use array_merge rather than + for RC query info fields

https://gerrit.wikimedia.org/r/415558

gerritbot added a comment.Mar 1 2018, 4:44 PM

Change 415592 had a related patch set uploaded (by Thcipriani; owner: Anomie):
[mediawiki/core@wmf/1.31.0-wmf.23] NewPagesPages: Use array_merge rather than + for RC query info fields

https://gerrit.wikimedia.org/r/415592

gerritbot added a comment.Mar 1 2018, 8:08 PM

Change 415592 merged by jenkins-bot:
[mediawiki/core@wmf/1.31.0-wmf.23] NewPagesPages: Use array_merge rather than + for RC query info fields

https://gerrit.wikimedia.org/r/415592

Stashbot added a comment.Mar 1 2018, 8:15 PM

Mentioned in SAL (#wikimedia-operations) [2018-03-01T20:15:45Z] <thcipriani@tin> Synchronized php-1.31.0-wmf.23/includes/specials/pagers/NewPagesPager.php: SWAT: [[gerrit:415592|NewPagesPages: Use array_merge rather than + for RC query info fields]] T188555 (duration: 01m 14s)

Krinkle added a comment.EditedMar 1 2018, 8:56 PM
In T188555#4012299, @greg wrote:

@Krinkle by triaging to High instead of UBN! should I interpret that as meaning that you don't think this should be a deployment blocker? [..]

Nope, I was just trying to be modest; given the relatively limited functional impact (low chance of permanent corruption, and otherwise limited to the UI). But on second thought, the timestamps being all wrong on NewPages is UBN in itself, not just because it happened to overflow low-severity error logs.

greg added a comment.Mar 1 2018, 9:33 PM
In T188555#4015594, @Krinkle wrote:
In T188555#4012299, @greg wrote:

@Krinkle by triaging to High instead of UBN! should I interpret that as meaning that you don't think this should be a deployment blocker? [..]

Nope, I was just trying to be modest based given the relatively limited functional impact (low chance of permanent corruption, and otherwise limited to the UI). But on second thought, the timestamps being all wrong on NewPages is UBN in itself, not just because it happened to overflow low-severity error logs.

ack :)

greg closed this task as Resolved.Mar 1 2018, 9:36 PM

Merged in master and wmf.23, confirmed fixed in production, resolving.

Liuxinyu970226 unsubscribed.Mar 4 2018, 4:16 AM
TheDJ subscribed.Mar 5 2018, 8:48 AM

Just wondering, as this clearly is a recurring problem, is this something we might be able to php code sniff for ?

ReleaseTaggerBot added a project: MW-1.31-release-notes (WMF-deploy-2018-03-06 (1.31.0-wmf.24)).Mar 6 2018, 12:01 PM
Ladsgroup removed a project: Patch-For-Review.May 21 2019, 9:33 PM
• mmodell changed the subtype of this task from "Task" to "Production Error".Aug 28 2019, 11:09 PM
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