[0.73.x] Metro crashes because of `__loadBundleAsync` about metro

[github-actions]

⚠️

Newer Version of React Native is Available!

ℹ️

You are on a supported minor version, but it looks like there's a newer patch available - 0.73.2. Please upgrade to the highest patch for your minor or latest and verify if the issue persists (alternatively, create a new project and repro the issue in it). If it does not repro, please let us know so we can close out this issue. This helps us ensure we are looking at issues that still exist in the most recent releases.

[cortinico]

Passing on to Metro

[cortinico]

Are you able to reproduce outside your private app at all?

@huextrat if you need, you can use this reproducer template https://github.com/react-native-community/reproducer-react-native

[github-actions]

⚠️	Missing Reproducible Example
ℹ️	We could not detect a reproducible example in your issue report. Please provide either: If your bug is UI related: a Snack If your bug is build/update related: use our Reproducer Template. A reproducer needs to be in a GitHub repository under your username.

[robhogan]

Hi @huextrat, thanks for the report.

Install the debug app on iOS & Android
Start the app on both devices
Open a screen with lazy components
Metro is crashing

I've just tried this with a fresh app and haven't been able to reproduce a crash or anything that'd suggest a leak. Are you able to reproduce outside your private app at all?

I wouldn't expect enabling lazy bundling in itself to increase memory usage particularly, but many parallel bundling requests might be too much.

You can try starting Metro with debug logging and experimenting with the memory limit - if you could record a video demonstrating the behaviour you're seeing, that might help us see what's going on. If you don't want to share publicly, feel free to email my GitHub username @ meta.com.

DEBUG=Metro:* NODE_OPTIONS=--max-old-space-size=8192 yarn start`

[huextrat]

Thx @robhogan, I've just e-mailed videos showing the problem.

Increasing node memory limit seems to fix the issue, was not able to reproduce with --max-old-space-size=8192.

I'm trying to create a project to reproduce when I have a bit of time, but it might be complicated. The problem only seems to arise if the load on the metro is high, which I think implies a project of a certain size.