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Maniphest T198559

Set Beta Cluster wikis to use the new MCR-only schema
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Description

The following setting switches fully MediaWiki to the new, MCR enabled database schema for revision storage:

$wgMultiContentRevisionSchemaMigrationStage = SCHEMA_COMPAT_NEW;
NOTE: This marks the point of no return for MCR deployment to the beta wikis. Data in the old schema will becom incomplete and unusable.

Details

SubjectRepoBranchLines +/-
Labs: set MCR migration stage to SCHEMA_COMPAT_NEWoperations/mediawiki-configmaster+1 -1
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Event Timeline

daniel triaged this task as Medium priority.Jul 1 2018, 12:29 PM
daniel created this task.
daniel added a subtask: T198311: Enable MCR migration stage "write both, read new" on commons beta..
daniel edited projects, added Multi-Content-Revisions (Deployment); removed SDC General, Wikidata.Jul 4 2018, 12:22 PM
Aklapper changed the edit policy from "Custom Policy" to "All Users".Jul 9 2018, 7:40 AM
Anomie closed subtask T198311: Enable MCR migration stage "write both, read new" on commons beta. as Resolved.Jul 25 2018, 5:54 PM
Jdforrester-WMF renamed this task from Set beta wikis to use the new MCR-only schema to Set Beta Cluster wikis to use the new MCR-only schema.Sep 24 2018, 6:42 PM
Jdforrester-WMF updated the task description. (Show Details)
Jdforrester-WMF added a project: Structured Data Engineering.Sep 27 2018, 11:49 PM
Jdforrester-WMF moved this task from To Do to Monitoring on the Structured Data Engineering board.
CCicalese_WMF added projects: Platform Engineering (MCR: Deployment), Platform Team Legacy (Later).Oct 3 2018, 6:06 PM
CCicalese_WMF moved this task from MCR: Deployment to MCR on the Platform Engineering board.Oct 4 2018, 3:12 PM
CCicalese_WMF edited projects, added Platform Engineering (MCR); removed Platform Engineering (MCR: Deployment).
greg added a project: Multimedia.Mar 7 2019, 10:59 PM
• Ramsey-WMF removed a project: Multimedia.Mar 8 2019, 4:22 PM
Restricted Application added a project: Multimedia. · View Herald TranscriptMar 8 2019, 4:22 PM
• Ramsey-WMF removed a project: Multimedia.Mar 8 2019, 4:22 PM
WDoranWMF moved this task from Later to Mop Column on the Platform Team Legacy board.Jul 5 2019, 2:13 PM
WDoranWMF removed a project: Platform Team Legacy (Later).
WDoranWMF moved this task from MCR to mop on the Platform Engineering board.Jul 26 2019, 6:39 PM
WDoranWMF edited projects, added Platform Team Initiatives (MCR); removed Platform Engineering (MCR).
CCicalese_WMF edited projects, added Platform Team Initiatives (MCR Schema Migration); removed Platform Team Initiatives (MCR).Aug 1 2019, 3:36 AM
Aklapper added a project: Structured-Data-Backlog.Aug 10 2019, 11:55 PM
• Ramsey-WMF moved this task from Triage to Tracking on the Structured-Data-Backlog board.Aug 14 2019, 2:06 AM
daniel updated the task description. (Show Details)Oct 1 2019, 7:51 AM
gerritbot added a comment.Oct 1 2019, 7:53 AM

Change 540083 had a related patch set uploaded (by Daniel Kinzler; owner: Daniel Kinzler):
[operations/mediawiki-config@master] Labs: set MCR migration stage to SCHEMA_COMPAT_NEW

https://gerrit.wikimedia.org/r/540083

gerritbot added a project: Patch-For-Review.Oct 1 2019, 7:53 AM
daniel added a project: Platform Team Workboards (Clinic Duty Team).Oct 1 2019, 7:55 AM
daniel moved this task from Inbox to Waiting for deployment on the Platform Team Workboards (Clinic Duty Team) board.
gerritbot added a comment.Oct 1 2019, 4:16 PM

Change 540083 merged by jenkins-bot:
[operations/mediawiki-config@master] Labs: set MCR migration stage to SCHEMA_COMPAT_NEW

https://gerrit.wikimedia.org/r/540083

Jdforrester-WMF closed this task as Resolved.Oct 1 2019, 4:21 PM
Jdforrester-WMF assigned this task to daniel.
Jdforrester-WMF subscribed.

This is now done.

daniel mentioned this in T198558: Set testwiki to use the new MCR-only schema.Oct 1 2019, 4:26 PM
daniel moved this task from Waiting for deployment to Done on the Platform Team Workboards (Clinic Duty Team) board.
Maintenance_bot removed a project: Patch-For-Review.Oct 1 2019, 5:11 PM
daniel reopened this task as Open.Oct 28 2019, 4:30 PM

Re-opening. This broke Special:Export, see e.g.
https://en.wikipedia.beta.wmflabs.org/wiki/Special:Export/0.42323637011943815

Presumably this has been broken for several weeks now. Apparently nobody noticed.

daniel added a comment.Oct 28 2019, 7:23 PM

Stack trace:

Internal error - Wikipedia</title><style>body { font-family: sans-serif; margin: 0; padding: 0.5em 2em; }</style></head><body>
<p>[XbcXTqwQBHcAABCBKksAAAAN] /wiki/Special:Export/0.42323637011943815   MWException from line 357 of /srv/mediawiki/php-master/includes/export/WikiExporter.php: Cannot use WikiExporter with SCHEMA_COMPAT_WRITE_OLD mode disabled! Support for dumping from the new schema is not implemented yet!</p><p>Backtrace:</p><p>#0 /srv/mediawiki/php-master/includes/export/WikiExporter.php(288): WikiExporter-&gt;dumpPages(string, boolean)<br />
#1 /srv/mediawiki/php-master/includes/export/WikiExporter.php(197): WikiExporter-&gt;dumpFrom(string)<br />
#2 /srv/mediawiki/php-master/includes/specials/SpecialExport.php(408): WikiExporter-&gt;pageByTitle(Title)<br />
#3 /srv/mediawiki/php-master/includes/specials/SpecialExport.php(191): SpecialExport-&gt;doExport(string, integer, boolean, boolean)<br />
#4 /srv/mediawiki/php-master/includes/specialpage/SpecialPage.php(575): SpecialExport-&gt;execute(string)<br />
#5 /srv/mediawiki/php-master/includes/specialpage/SpecialPageFactory.php(607): SpecialPage-&gt;run(string)<br />
#6 /srv/mediawiki/php-master/includes/MediaWiki.php(298): MediaWiki\Special\SpecialPageFactory-&gt;executePath(Title, RequestContext)<br />
#7 /srv/mediawiki/php-master/includes/MediaWiki.php(967): MediaWiki-&gt;performRequest()<br />
#8 /srv/mediawiki/php-master/includes/MediaWiki.php(530): MediaWiki-&gt;main()<br />
#9 /srv/mediawiki/php-master/index.php(44): MediaWiki-&gt;run()<br />
#10 /srv/mediawiki/w/index.php(3): require(string)<br />
#11 {main}
daniel closed this task as Resolved.Oct 29 2019, 8:48 AM
daniel closed subtask T236735: Allow WikiExporter to function with MCR-only schema as Resolved.

Bug fixed, see T236735: Allow WikiExporter to function with MCR-only schema.

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