<!-- ccr-slack-attribution -->
_Requested by **Matt Aitken** · [Slack
thread](https://triggerdotdev.slack.com/archives/C045W9WM3E1/p1786732623292829?thread_ts=1786732623.292829&cid=C045W9WM3E1)_
**Before:** you pause an environment, then a deploy lands (or a
background worker is created, or an admin changes the
concurrency/burst-factor). The environment starts picking up runs again
even though the dashboard still shows it as paused.
**After:** a paused environment stays paused until it is resumed, no
matter what else pushes its concurrency limit.
Pausing an environment sets `paused` in the database and writes a `0`
env concurrency limit into the run queue — the `0` is the only thing
that actually stops dequeueing. Any caller that pushed the limit without
an explicit value (`finalizeDeployment`, `createBackgroundWorker`, the
two admin environment routes) rewrote the real limit and silently
un-paused the environment.
## ✅ Checklist
- [x] I have followed every step in the [contributing
guide](https://github.com/triggerdotdev/trigger.dev/blob/main/CONTRIBUTING.md)
- [x] The PR title follows the convention.
- [x] I ran and tested the code works
---
## Testing
`apps/webapp/test/pauseEnvironment.server.test.ts` gains two
`containerTest` cases that wire a real `RunEngine` (real Redis) in place
of the stubbed app singleton and assert the actual run-queue env limit:
- pause a PRODUCTION env → limit is `0` → run the real
`FinalizeDeploymentService` → limit is still `0`, plus a control on a
running env in the same test proving that deploy path really does push
the limit (so the `0` can't just mean "nothing happened").
- pause → resume → the real limit is restored, so the clamp can't
regress resuming.
Both cases fail on `main` (`expected 17 to be +0` and `expected +0 to be
17`) and pass with this change. `pnpm run typecheck --filter webapp` is
clean.
---
## Changelog
Fix paused environments starting to run work again after a deploy.
---
## How
The clamp lives in the shared `updateEnvConcurrencyLimits` helper in
`apps/webapp/app/v3/runQueue.server.ts`, so every present and future
caller is covered: when no explicit limit is passed and the environment
is paused, `0` is written instead of the stored maximum. An
explicitly-passed limit still wins, which is what pausing itself relies
on. The resume path now passes the post-update environment state (its
in-memory copy was read before the un-pause and would otherwise be
clamped back to `0`), and the helper no longer mutates the caller's
environment object — that aliasing made a pause followed by a resume on
the same object write `0` twice. The existing `!paused` guards in
`allocateConcurrency` and the queue-level guard in
`createBackgroundWorker` are left in place as defence in depth, and
queue-level `TaskQueue.paused` behaviour is untouched.
---------
Co-authored-by: Claude <noreply@anthropic.com>
claude[bot]
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