feat(cli): exit with a warning if a command leaves the process running by wikirik-agent · Pull Request #18590 · sequelize/sequelize

wikirik-agent · 2026-10-25T09:56:44Z

Pull Request Checklist

Have you added new tests to prevent regressions?
If a documentation update is necessary, have you opened a PR to the documentation repository? (will be added to the CLI docs in docs: rewrite the CLI page for @sequelize/cli website#851)
Did you update the typescript typings accordingly (if applicable)? (no public API change)
Does the description below contain a link to an existing issue (Closes #[issue]) or a description of the issue you are solving?
Does the name of your PR follow our conventions?

Description of Changes

Commands close their database connection when they finish. But a migration or seed that leaves a timer, socket or connection open keeps the Node process alive, so sequelize migration run never exits and CI or deploy pipelines hang. sequelize-cli v6 avoided this by always calling process.exit(), which also hid such leaks.

bin/run.js now arms an unref'd 5-second timer after a successful command:

If the process exits normally, which is the usual case, the timer doesn't delay it.
If the process is still running after 5 seconds, the CLI prints a warning with the active resources (process.getActiveResourcesInfo()) and exits with the command's exit code.
Failed commands already exit through oclif's error handler, so they're unaffected.

Example with a migration that calls setInterval and never clears it:

Successfully ran 1 migration(s).
  ✔ 2024-01-01-leaky.mjs
The command finished, but the process was still running 5s later (active resources: PipeWrap, Timeout). A migration or seed may have left a timer, socket or connection open. Exiting.

Before this change, that command never exited. A clean run still exits immediately.

bin/dev.js (contributors only) is unchanged.

List of Breaking Changes

None.

🤖 Generated with Claude Code

Summary by CodeRabbit

Bug Fixes
- The CLI now detects when a process remains active after a command completes. After a brief grace period, it reports active resources and exits with the command’s existing exit status. The CLI waits for the warning to flush before exiting, but uses a timeout if output stalls. This prevents lingering processes from keeping the CLI running indefinitely.

Commands close their database connection when they finish, but a migration or seed that leaves a timer, socket or connection open kept the process (and CI/deploy pipelines) running forever. sequelize-cli v6 avoided this by always calling process.exit(). After a successful command, the CLI now waits 5 seconds. If the process is still running by then, it prints a warning listing the active resources and exits with the command's exit code. The timer is unref'd, so it doesn't delay processes that exit normally. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

coderabbitai · 2026-10-25T09:57:24Z

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packages/cli/src/_internal/exit-grace-period.ts

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packages/cli/src/_internal/exit-grace-period.ts

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Walkthrough

The CLI runner now schedules a grace-period exit after execute() completes. The helper reports active resources when its timer fires and exits with the current exit code.

Changes: CLI exit handling

Layer / File(s)	Summary
Schedule and verify grace-period exit `packages/cli/src/_internal/exit-grace-period.ts`, `packages/cli/bin/run.js`, `packages/cli/src/_internal/exit-grace-period.test.ts`	The helper schedules an unreferenced timer and exits after the warning flushes or the flush timeout expires. The CLI runner calls it after `execute()`. Tests cover warning flushing, exit code, timeout fallback, and timer reference state.

Priority: Normal

Estimated code review effort: 2 (Simple) | ~10 minutes

Change: Feature

Merge Risk: Low · up to 04263

The CLI should exit after the grace period in normal use, but it can still hang on Windows if its stderr pipe stops being read. This bounded risk can be accepted for merge or addressed with a nonblocking warning path.

Pre-merge checks: 4 · 1

Failed checks: 1 warning

Check name	Status	Explanation	Resolution
Docstring Coverage		Docstring coverage is 50.00% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 2 functions across 3 files.	Write docstrings for the functions missing them to satisfy the coverage threshold.

Passed checks: 4 passed

Check name	Status	Explanation
Description Check		Check skipped - CodeRabbit’s high-level summary is enabled.
Title check		The title clearly and concisely describes the main change: the CLI exits with a warning when a command leaves the process running.
Linked Issues check		Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check		Check skipped because no linked issues were found for this pull request.

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Actionable comments posted: 1

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Inline comments:
Review comments at @packages/cli/src/_internal/exit-grace-period.ts:
- Line 29: Update the exit flow after warn() so it waits for piped stdout and
stderr to drain before calling exit(), while retaining a bounded fallback that
guarantees the grace-period exit even if either stream remains blocked.

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packages/cli/bin/run.js
packages/cli/src/_internal/exit-grace-period.test.ts
packages/cli/src/_internal/exit-grace-period.ts

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stdout and stderr are asynchronous when piped on some platforms (e.g. macOS), so exiting right after the warning could drop it. Exit once pending output has been written, with a 1 second fallback so a blocked stream can't prevent the exit. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

…t-grace-period

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Inline comments:
Review comments at @packages/cli/src/_internal/exit-grace-period.ts:
- Line 23: Update the warning output in the exit grace-period flow so a full
stderr pipe cannot block the one-second exit deadline; use a nonblocking output
path or an independent watchdog that can enforce the deadline while the stream
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packages/cli/src/_internal/exit-grace-period.test.ts
packages/cli/src/_internal/exit-grace-period.ts

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Pipes are asynchronous on POSIX systems (Linux and macOS) and synchronous on Windows, per the "A note on process I/O" section of the Node.js docs. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

wikirik-agent requested a review from a team as a code owner October 25, 2026 09:56

wikirik-agent added the topic: cli For issues and PRs. Things that involve the @sequelize/cli package. label Oct 25, 2026

wikirik-agent requested review from SippieCup and WikiRik October 25, 2026 09:56

wikirik-agent added the topic: cli For issues and PRs. Things that involve the @sequelize/cli package. label Oct 25, 2026

coderabbitai Bot reviewed Oct 25, 2026

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Comment thread packages/cli/src/_internal/exit-grace-period.ts Outdated

wikirik-agent and others added 2 commits October 25, 2026 16:50

Merge remote-tracking branch 'origin/main' into wikirik-agent/cli-exi…

827b89d

…t-grace-period

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Comment thread packages/cli/src/_internal/exit-grace-period.ts

meta(cli): correct the platforms in the stdio flush comment

04263f1

Pipes are asynchronous on POSIX systems (Linux and macOS) and synchronous on Windows, per the "A note on process I/O" section of the Node.js docs. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

WikiRik approved these changes Oct 25, 2026

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WikiRik enabled auto-merge (squash) October 25, 2026 17:44

sequelize-bot Bot added 2 commits October 25, 2026 17:44

Merge branch 'main' into wikirik-agent/cli-exit-grace-period

a254f56

Merge branch 'main' into wikirik-agent/cli-exit-grace-period

8e97ee2

WikiRik merged commit b7f5857 into main Oct 25, 2026
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WikiRik deleted the wikirik-agent/cli-exit-grace-period branch October 25, 2026 18:53

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feat(cli): exit with a warning if a command leaves the process running - #18590

feat(cli): exit with a warning if a command leaves the process running#18590
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