Unresponsive web worker on unsuspend

[raineorshine]

The web worker connection fails sometimes after the app becomes unsuspended.

Notes

• PWA only
• Maybe the web worker is suspended and never restarted
• Unable to reproduce in offline mode
• PWA over localhost can’t connect to server
• Safari websocket suspended
• Related to server
  • Goes offline while server is backed up with db.getYDoc
  • Comes back online after server finishes syncing
  • Or if it is too long, stays offline until next edit
  • Merely creating a new WebsocketProvider causes the issue, even if it’s not saved or subscribed to
• Staging only
  • It can be reproduced in a small thoughtspace if the app goes passive
  • Therefore, it will not be absolved by server performance improvements
    • though that is the easiest way to induce it
  • If small thoughtspaces are susceptible, why can’t I reproduce it on localhost?
  • The web worker shouldn’t become unresponsive just because the website is down

References

• Service worker example: stops working when SW is suspended GoogleChromeLabs/comlink#637