Thomas Trompette
0ac4f237c0
## Context `Lambda invocation failed for function '<id>' during build: Failed to acquire lock for key: lambda-build:<id>` fires ~1000 times/day in production. ## Root cause `LambdaExecutorManagerService.buildExecutor` re-checks `canSkip` inside the `lambda-build:<functionId>` lock, but the re-check reuses the `flatApplication` snapshot captured when the request started. `canSkip` depends on `!flatApplication.isSdkLayerStale`, so: 1. An app sync/install regenerates the SDK client and sets `isSdkLayerStale = true` 2. All in-flight executions of the function fail `canSkip` and queue on the lock 3. The first holder rebuilds and `markSdkLayerFresh` clears the flag in DB + workspace cache 4. Queued waiters can't see that fix — their in-memory snapshot still says stale — so **each waiter redoes the full rebuild serially** (download SDK archive, delete + republish layer, update function config, wait for update) 5. The lock is held back-to-back for minutes; everyone deeper in the queue exhausts the 120s retry budget and throws The local driver already handles this correctly (`LocalLayerManagerService` refreshes the flat application from the workspace cache inside its lock); the lambda driver missed it. ## Fix - Refresh `flatApplication` from the workspace cache inside the lock before re-checking `canSkip`, so waiters skip in ~100ms once the first holder finishes - Degrade gracefully on lock-acquisition timeout: re-check build status with fresh data and proceed with the invocation if the executor is already usable, instead of failing the run (introduces a typed `CacheLockAcquisitionError` so only that case is caught) ## Test plan - [x] `cache-lock.service.spec.ts` passes - [x] `lint:diff-with-main` + typecheck pass - [ ] Monitor `Failed to acquire lock for key: lambda-build:*` error rate in production after deploy
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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.
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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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