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pytorch - ✅(Solved) Fix Run pull jobs on OSDC in pull requests shadow mode [1 pull requests, 1 participants]

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pytorch/pytorch#183242•Fetched 2026-05-11 03:12:42
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Error Message

Error looks like

Root Cause

N/A

Fix Action

Mitigation

PR fix notes

PR #183243: Always run EC2 route on pull requests in _linux-build/_linux-test

Description (problem / solution / changelog)

Stack from ghstack (oldest at bottom):

  • -> #183243
  • #183244

On pull_request events, the reusable Linux build and test workflows now always execute the EC2 job regardless of the use-arc input. When a caller passes use-arc=true on a PR, the OSDC job still runs alongside, giving us shadow-mode data on OSDC without losing EC2 signal. Pushed commits and scheduled workflows continue to honor use-arc as before, selecting exactly one route. See https://github.com/pytorch/pytorch/issues/183242.

Testing

https://github.com/pytorch/pytorch/actions/runs/25646709118

Authored by Claude.

Changed files

  • .github/workflows/_linux-build.yml (modified, +11/-3)
  • .github/workflows/_linux-test.yml (modified, +6/-2)
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Current Status

Not yet started

Error looks like

Pull jobs running on EC2 normally. Dr.CI and mergebot ignores OSDC failures.

Incident timeline (all times pacific)

May 11th

User impact

No impact, this is to test OSDC in shadow mode

Root cause

N/A

Mitigation

Prevention/followups

N/A

cc @seemethere @malfet @pytorch/pytorch-dev-infra

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pytorch - ✅(Solved) Fix Run pull jobs on OSDC in pull requests shadow mode [1 pull requests, 1 participants]