If this PR fixes an issue, link it below. If not, delete these two
lines.
Resolves#2868
## Description:
This PR addresses a critical memory leak in the Master server process
(causing ~30GB RAM usage).
The issue was caused by `setInterval` calling `fetchLobbies()` every
100ms. When `fetchLobbies` took longer than 100ms to complete (due to
network latency or load), requests would pile up indefinitely, creating
a massive queue of pending Promises and open sockets.
I have refactored the polling logic into a generic `startPolling`
utility (in `src/server/PollingLoop.ts`) that uses a recursive
`setTimeout` pattern. This ensures that the next `fetchLobbies` call is
only scheduled *after* the previous one has completed (successfully or
failed), preventing any request pile-up.
## Please complete the following:
- [x] I have added screenshots for all UI updates (N/A - backend only)
- [x] I process any text displayed to the user through translateText()
and I've added it to the en.json file (N/A - no user facing text)
- [x] I have added relevant tests to the test directory
(`tests/PollingLoop.test.ts`)
- [x] I confirm I have thoroughly tested these changes and take full
responsibility for any bugs introduced
## Please put your Discord username so you can be contacted if a bug or
regression is found:
codimo
Himansu Rawal