feat(bson-parsing): terminate worker if execution exceeds 2mins COMPASS-11147

[mabaasit]

Description

COMPASS-11147

Open Questions

Checklist

• I have signed the Contributor License Agreement (https://www.mongodb.com/legal/contributor-agreement)
• New tests and/or benchmarks are included
• Documentation is changed or added

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[Anemy]

Should consumers be able to pass this timeout? Will 0 indicate no timeout?

[mabaasit]

That's a good idea, will implement this.

[Copilot]

Copilot review overview

🟡 Changes recommended

Moderate worker-concurrency and test-environment cleanup issues remain unresolved.

Get a fresh assessment by requesting another Copilot review.

Review effort: Lite
Findings: 2 · 2

Open (4)

• Restore unset TEST_WORKER_SCRIPT_URL after tests · New
• Prevent incorrect worker termination during concurrent initialization · New
• Fix grammatical typo in timeout comment · New
• Fix duplicated verb in comment · New

What changed in this PR

Adds configurable two-minute execution timeouts for BSON parser workers, including worker termination and slow-worker tests.

Changes:

• Adds timeout handling and worker termination.
• Exposes timeout options through the parser API.
• Adds slow-worker fixtures, tests, and related dependency/lint configuration.

File	Reviewed changes	Findings
packages/​shell-bson-parser/​tsconfig-lint.json	Excludes test fixtures from lint type checking.	No findings.
packages/​shell-bson-parser/​test/​fixtures/​slow-worker.mjs	Adds a deliberately slow worker fixture.	No findings.
packages/​shell-bson-parser/​src/​worker-client.ts	Implements request timers and worker termination.	moderate (2 votes): global termination can target the wrong worker during concurrent initialization, leaving the timed-out worker active and leaking its blob URL. Initialization must be serialized or termination made instance-aware. nit (3 votes): correct the duplicated/incorrect verb in the comment.
packages/​shell-bson-parser/​src/​index.ts	Exposes execution timeout options.	No findings.
packages/​shell-bson-parser/​src/​index.spec.ts	Adds timeout and worker replacement tests.	moderate (3 votes, also line 233): restore or delete TEST_WORKER_SCRIPT_URL when initially unset. moderate (1 vote): the cleanup truthiness check leaks the override when initially undefined. nit (2 votes): correct the comment to say the request “times out.”
packages/​shell-bson-parser/​package.json	Adds the worker test dependency.	No findings.
packages/​shell-bson-parser/​.eslintrc.cjs	Excludes fixture files from ESLint.	No findings.
package-lock.json	Locks the new dependency.	No findings.

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