Félix Malfait
a75414a05e
## Rationale `NOT_AUTHORIZED` and `EVENT_STREAM_ALREADY_EXISTS` on the event-stream mutations are **expected coordination outcomes** — the frontend explicitly recognizes both (`isGracefullyHandledEventStreamError`) and recovers by recreating its stream. But `EventStreamExceptionFilter` rethrows them as `InternalServerError`, which (a) Sentry captures on every single occurrence, and (b) counts as a 500 in operation metrics. **Production evidence (Sentry):** this turned a March client-regression into a 119,510-event / 2,607-user flood ([TWENTY-SERVER-FP3](https://twenty-v7.sentry.io/issues/TWENTY-SERVER-FP3), plus FP0 at ~29k) that buried real errors. The trigger was fixed back then, but the amplifier — error-level capture of an expected signal — is still in place, and a residual trickle still fires today. Second defect, client side: for any *non-graceful* server error (e.g. a lock-acquisition timeout), `SSEQuerySubscribeEffect.handleError` **threw** from inside a debounced callback — an unhandled rejection ([TWENTY-FRONT-62M](https://twenty-v7.sentry.io/issues/TWENTY-FRONT-62M), 233 users; [6MM](https://twenty-v7.sentry.io/issues/TWENTY-FRONT-6MM), 65 users) that left the tab's query listeners permanently out of sync with the server (no more live updates until reload). ## Why this is the root cause, not a symptom patch The protocol design already says these are recoverable client-coordination signals — the bug is purely that the server encodes them with 500 semantics and the client punishes unexpected errors by giving up instead of resetting. This PR aligns both ends with the existing design rather than adding new machinery: - Server: `ForbiddenError` (403) with the same `subCode` — the client's graceful check already accepts `code === 'FORBIDDEN'`, so this is compatible by construction; `FORBIDDEN` is already in `graphQLErrorCodesToFilter`, so monitoring capture stops with no new filtering logic. - Client: the non-graceful path now does exactly what the graceful path does (reset listeners + recreate stream) and *additionally* reports the unexpected error — visibility without a crash. ## User impact Tabs that hit any event-stream error now always self-heal back to live updates instead of silently going stale until reload (~300 users hit the crash path over 90d). On the ops side: expected coordination noise leaves error monitoring, and 403/500 metrics become truthful. ## Test plan - [x] Behavior preserved for graceful codes (same reset path, client check already includes FORBIDDEN) - [ ] CI green https://claude.ai/code/session_01Lyi6zTema2FMVVh8MD6c38 --- _Generated by [Claude Code](https://claude.ai/code/session_01Lyi6zTema2FMVVh8MD6c38)_ <!-- This is an auto-generated description by cubic. --> <a href="https://cubic.dev/pr/twentyhq/twenty/pull/22475?utm_source=github" target="_blank" rel="noopener noreferrer" data-no-image-dialog="true"><picture><source media="(prefers-color-scheme: dark)" srcset="https://www.cubic.dev/buttons/review-in-cubic-dark.svg"><source media="(prefers-color-scheme: light)" srcset="https://www.cubic.dev/buttons/review-in-cubic-light.svg"><img alt="Review in cubic" src="https://www.cubic.dev/buttons/review-in-cubic-dark.svg"></picture></a> <!-- End of auto-generated description by cubic. -->
The #1 Open-Source CRM
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Why Twenty
Twenty gives technical teams the building blocks for a custom CRM that meets complex business needs and quickly adapts as the business evolves. Twenty is the CRM you build, ship, and version like the rest of your stack.
Learn more about why we built Twenty
Installation
Cloud
The fastest way to get started. Sign up at twenty.com and spin up a workspace in under a minute, with no infrastructure to manage and always up to date.
Build an app
Scaffold a new app with the Twenty CLI:
npx create-twenty-app my-app
Define objects, fields, and views as code:
import { defineObject, FieldType } from 'twenty-sdk/define';
export default defineObject({
nameSingular: 'deal',
namePlural: 'deals',
labelSingular: 'Deal',
labelPlural: 'Deals',
fields: [
{ name: 'name', label: 'Name', type: FieldType.TEXT },
{ name: 'amount', label: 'Amount', type: FieldType.CURRENCY },
{ name: 'closeDate', label: 'Close Date', type: FieldType.DATE_TIME },
],
});
Then ship it to your workspace:
npx twenty app:publish --private
See the app development guide for objects, views, agents, and logic functions.
Self-hosting
Run Twenty on your own infrastructure with Docker Compose, or contribute locally via the local setup guide.
Everything you need
Twenty gives you the building blocks of a modern CRM (objects, views, workflows, and agents) and lets you extend them as code. Here's a tour of what's in the box.
Want to go deeper? Read the 
User Guide for product walkthroughs, or the Documentation for developer reference.
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TypeScript
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NestJS, with BullMQ, 
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React, with Jotai, Linaria and Lingui
Thanks
Thanks to these amazing services that we use and recommend for code review (Greptile), catching bugs (Sentry) and translating (Crowdin).
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