Maniphest T415630

Improve timeout guarantees in Rust evaluator
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Jdforrester-WMF

Authored By

	cmassaro
	Jan 27 2026, 8:01 AM

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Jdforrester-WMF

Description

Description

tokio::timeout is implemented as an async poll, which means that the specified timeout duration only gives a minimum bound on when the Future will return.

Desired behavior/Acceptance criteria (returned value, expected error, performance expectations, etc.)

use a construct that polls more often, tightening the maximum bound on the timeout

Completion checklist

Before closing this task, review one by one the checklist available here: https://www.mediawiki.org/wiki/Abstract_Wikipedia_team/Definition_of_Done#Back-end_Task/Bug_completion_checklist

Details

Related Changes in Gerrit:

	Subject	Repo	Branch	Lines +/-
	wikifunctions: Upgrade evaluators from 2026-04-06-224243 to 2026-04-14-215402	operations/deployment-charts	master	+2 -2
	wikifunctions: Upgrade evaluators from 2026-04-06-224243 to 2026-04-14-215402	operations/deployment-charts	master	+2 -2

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Related Objects
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		Status	Subtype	Assigned	Task
		Open		None	T421849 [Hypothesis] WE2.3.16 Productionize Rust Evaluator and Deprecate Node Evaluator
		Resolved		Jdforrester-WMF	T415630 Improve timeout guarantees in Rust evaluator

Event Timeline

cmassaro created this task.Jan 27 2026, 8:01 AM

Is your thought that we could use timeout to poll more frequently (e.g. every ~1s) and check if the total elapsed time is over the limit?

Jdforrester-WMF triaged this task as Low priority.Jan 28 2026, 6:36 PM

Jdforrester-WMF moved this task from To Triage to Engineering Backlog on the Abstract Wikipedia team board.

Jdforrester-WMF changed the task status from Open to In Progress.Apr 9 2026, 11:50 PM

Jdforrester-WMF claimed this task.

Jdforrester-WMF edited projects, added Abstract Wikipedia team (26Q4 (Apr–Jun)), Essential-Work; removed Abstract Wikipedia team.

Jdforrester-WMF moved this task from Incoming to In Code review on the Abstract Wikipedia team (26Q4 (Apr–Jun)) board.

Jdforrester-WMF mentioned this in rMSFEdac808a57e9c: rustversion: Enable fuel-based async yielding for reliable timeouts.Apr 10 2026, 12:14 AM

jforrester opened https://gitlab.wikimedia.org/repos/abstract-wiki/wikifunctions/function-evaluator/-/merge_requests/514

rustversion: Enable fuel-based async yielding for reliable timeouts

Jdforrester-WMF mentioned this in T412768: More Rust cleanup.Apr 10 2026, 12:21 AM

Jdforrester-WMF mentioned this in rMSFE0935b1eeb3a7: rustversion: Enable fuel-based async yielding for reliable timeouts.Apr 10 2026, 6:03 PM

Jdforrester-WMF mentioned this in rMSFE43d0ffcc501d: rustversion: Enable fuel-based async yielding for reliable timeouts.Apr 10 2026, 10:27 PM

jforrester merged https://gitlab.wikimedia.org/repos/abstract-wiki/wikifunctions/function-evaluator/-/merge_requests/514

rustversion: Enable fuel-based async yielding for reliable timeouts

Jdforrester-WMF mentioned this in rMSFE3b7eb634b954: rustversion: Enable fuel-based async yielding for reliable timeouts.Apr 10 2026, 10:49 PM

Maintenance_bot removed a project: Patch-For-Review.Apr 10 2026, 11:31 PM

Jdforrester-WMF closed this task as Resolved.Apr 10 2026, 11:54 PM

Jdforrester-WMF moved this task from In Code review to Needs Sign-off on the Abstract Wikipedia team (26Q4 (Apr–Jun)) board.

DSantamaria added a parent task: T421849: [Hypothesis] WE2.3.16 Productionize Rust Evaluator and Deprecate Node Evaluator.Apr 14 2026, 2:54 PM

DSantamaria edited projects, added OKR-Work; removed Essential-Work.

Change #1271724 had a related patch set uploaded (by Jforrester; author: Jforrester):

[operations/deployment-charts@master] wikifunctions: Upgrade evaluators from 2026-04-06-224243 to 2026-04-14-215402

https://gerrit.wikimedia.org/r/1271724

gerritbot added a project: Patch-For-Review.Apr 15 2026, 2:00 PM

Change #1271724 merged by jenkins-bot:

[operations/deployment-charts@master] wikifunctions: Upgrade evaluators from 2026-04-06-224243 to 2026-04-14-215402

https://gerrit.wikimedia.org/r/1271724

Maintenance_bot removed a project: Patch-For-Review.Apr 15 2026, 2:31 PM

Change #1271915 had a related patch set uploaded (by Jforrester; author: Jforrester):

[operations/deployment-charts@master] wikifunctions: Upgrade evaluators from 2026-04-06-224243 to 2026-04-14-215402

https://gerrit.wikimedia.org/r/1271915

gerritbot added a project: Patch-For-Review.Apr 15 2026, 8:53 PM

Change #1271915 merged by jenkins-bot:

[operations/deployment-charts@master] wikifunctions: Upgrade evaluators from 2026-04-06-224243 to 2026-04-14-215402

https://gerrit.wikimedia.org/r/1271915

Maintenance_bot removed a project: Patch-For-Review.Apr 15 2026, 9:32 PM