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Formally EOL MW 1.39
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Description

As per https://www.mediawiki.org/wiki/Version_lifecycle, MW 1.39 is EOL at the end of December 2025.

Previous (in date order): T389313: Formally EOL MW 1.42

As per the MediaWiki version lifecycle[1], I would like to announce the formal end of life (EOL) of MediaWiki 1.39 as of December 31, 2025.

1.39.17 is expected to be the last release for this branch.

This means that MediaWiki 1.39 will no longer receive maintenance or security backports. It is therefore strongly discouraged that you continue to use it.

It is recommended to upgrade either to the next LTS, 1.43, which will be supported until the end of December 2027. Or to either MediaWiki 1.44, which will be supported until the end of July 2026, or to MediaWiki 1.45, which will be supported until the end of December 2026.

Thanks!

[1] https://www.mediawiki.org/wiki/Version_lifecycle

Details

Due Date
Dec 31 2025, 11:30 PM
Related Changes in Gerrit:
SubjectRepoBranchLines +/-
autobackport: Remove REL1_39translatewikimaster+0 -6
CommonSettings: Remove EOL REL1_39 from ExtensionDistributoroperations/mediawiki-configmaster+0 -1
autobackport: Mark REL1_39 as inactivetranslatewikimaster+1 -0
zuul: Drop CI for REL1_39integration/configmaster+1 -196
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Event Timeline

Reedy created this task.Aug 28 2025, 5:05 PM
Restricted Application added a subscriber: Aklapper. · View Herald TranscriptAug 28 2025, 5:05 PM
Reedy set Due Date to Dec 31 2025, 11:30 PM.Aug 28 2025, 5:05 PM
Jdforrester-WMF added a parent task: T395470: Drop deprecated phpunit.php and suite.xml.Aug 28 2025, 5:05 PM
Jdforrester-WMF subscribed.
A_smart_kitten added a project: MediaWiki-Documentation.Aug 28 2025, 5:12 PM
Pppery subscribed.Aug 28 2025, 5:18 PM
Reedy added a subtask: T404610: Release MediaWiki 1.39.16/1.43.6/1.44.3/1.45.1.Sep 23 2025, 10:46 AM
Jdforrester-WMF added a parent task: T401155: Archive wikimedia/ip-set library.Oct 7 2025, 2:32 PM
Krinkle removed a parent task: T401155: Archive wikimedia/ip-set library.Oct 27 2025, 4:28 PM
Reedy created subtask T412854: Release 1.39.17.Dec 16 2025, 5:56 PM
Reedy closed subtask T412854: Release 1.39.17 as Resolved.Dec 16 2025, 6:21 PM
Reedy changed the task status from Open to In Progress.Dec 16 2025, 6:30 PM
Reedy triaged this task as High priority.
Reedy updated the task description. (Show Details)
Reedy updated the task description. (Show Details)Dec 26 2025, 9:37 PM
Reedy mentioned this in T413018: Parsoid tests in REL1_XX branches need updating for T407131.Dec 28 2025, 12:43 AM
gerritbot added a comment.Dec 29 2025, 8:38 PM

Change #1221640 had a related patch set uploaded (by Reedy; author: Reedy):

[operations/mediawiki-config@master] CommonSettings: Remove EOL REL1_39 from ExtensionDistributor

https://gerrit.wikimedia.org/r/1221640

gerritbot added a project: Patch-For-Review.Dec 29 2025, 8:38 PM
gerritbot added a comment.Dec 29 2025, 8:41 PM

Change #1221641 had a related patch set uploaded (by Reedy; author: Reedy):

[translatewiki@master] autobackport: Mark REL1_39 as inactive

https://gerrit.wikimedia.org/r/1221641

gerritbot added a comment.Dec 29 2025, 8:42 PM

Change #1221642 had a related patch set uploaded (by Reedy; author: Reedy):

[translatewiki@master] autobackport: Remove REL1_39

https://gerrit.wikimedia.org/r/1221642

gerritbot added a comment.Dec 29 2025, 8:50 PM

Change #1221644 had a related patch set uploaded (by Reedy; author: Reedy):

[integration/config@master] zuul: Drop CI for REL1_39

https://gerrit.wikimedia.org/r/1221644

gerritbot added a comment.Jan 1 2026, 2:29 AM

Change #1221644 merged by jenkins-bot:

[integration/config@master] zuul: Drop CI for REL1_39

https://gerrit.wikimedia.org/r/1221644

CodeReviewBot added a comment.Jan 1 2026, 2:31 AM

reedy opened https://gitlab.wikimedia.org/repos/ci-tools/libup-config/-/merge_requests/103

Stop running libup on REL1_39

CodeReviewBot added a comment.Jan 1 2026, 2:32 AM

reedy merged https://gitlab.wikimedia.org/repos/ci-tools/libup-config/-/merge_requests/103

Stop running libup on REL1_39

Umherirrender mentioned this in T369279: Gate-and-submit-1_39 fails for CampaignEvents because it tries to install WikimediaCampaignEvents (which does not have a 1_39 branch).Jan 3 2026, 4:41 PM
Umherirrender mentioned this in T373736: Gate-and-submit for release branch 1.39 and 1.41 fails for Babel and GrowthExperiments because it tries to install CommunityConfiguration (which does not have a 1_39 or 1.41 branch).
gerritbot added a comment.Jan 5 2026, 1:31 PM

Change #1221641 merged by jenkins-bot:

[translatewiki@master] autobackport: Mark REL1_39 as inactive

https://gerrit.wikimedia.org/r/1221641

Jdforrester-WMF closed this task as Resolved.Jan 5 2026, 1:40 PM
Jdforrester-WMF assigned this task to Reedy.

Announcement e-mail was https://lists.wikimedia.org/hyperkitty/list/wikitech-l@lists.wikimedia.org/thread/3EXWLDDHRGVDQACOHP3Y4ZE5H6BHBJPJ/

Let's call this complete.

gerritbot added a comment.Jan 5 2026, 2:23 PM

Change #1221640 merged by jenkins-bot:

[operations/mediawiki-config@master] CommonSettings: Remove EOL REL1_39 from ExtensionDistributor

https://gerrit.wikimedia.org/r/1221640

Stashbot mentioned this in T410931: Create rollbacker user group for tr.wikisource.org.Jan 5 2026, 2:23 PM

Mentioned in SAL (#wikimedia-operations) [2026-01-05T14:23:22Z] <stran@deploy2002> Started scap sync-world: Backport for [[gerrit:1210681|trwikisource: Create rollbacker user group (T410931)]], [[gerrit:1219219|Enable protection indicators for ruwiki]], [[gerrit:1221640|CommonSettings: Remove EOL REL1_39 from ExtensionDistributor (T403199)]]

Stashbot added a comment.Jan 5 2026, 2:25 PM

Mentioned in SAL (#wikimedia-operations) [2026-01-05T14:25:17Z] <stran@deploy2002> reedy, stran, neriah: Backport for [[gerrit:1210681|trwikisource: Create rollbacker user group (T410931)]], [[gerrit:1219219|Enable protection indicators for ruwiki]], [[gerrit:1221640|CommonSettings: Remove EOL REL1_39 from ExtensionDistributor (T403199)]] synced to the testservers (see https://wikitech.wikimedia.org/wiki/Mwdebug). Changes can now be verified there.

Stashbot added a comment.Jan 5 2026, 2:43 PM

Mentioned in SAL (#wikimedia-operations) [2026-01-05T14:43:53Z] <stran@deploy2002> Finished scap sync-world: Backport for [[gerrit:1210681|trwikisource: Create rollbacker user group (T410931)]], [[gerrit:1219219|Enable protection indicators for ruwiki]], [[gerrit:1221640|CommonSettings: Remove EOL REL1_39 from ExtensionDistributor (T403199)]] (duration: 20m 31s)

gerritbot added a comment.Jan 14 2026, 3:54 AM

Change #1221642 merged by jenkins-bot:

[translatewiki@master] autobackport: Remove REL1_39

https://gerrit.wikimedia.org/r/1221642

Maintenance_bot removed a project: Patch-For-Review.Jan 14 2026, 4:30 AM
Reedy closed subtask T404610: Release MediaWiki 1.39.16/1.43.6/1.44.3/1.45.1 as Resolved.Jan 21 2026, 9:02 PM
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