segment_rotation_scenario test fails with "Too many open files" on macOS

[grainier]

server::specific::segment_rotation_scenario fails with os error 24, even when run in isolation: cargo test -p integration segment_rotation_scenario

Failed to open index file: .../00000000000000004555.index. Too many open files (os error 24)

2026-03-13T13:25:37.088335Z ERROR shard-1 err_trail: Failed to open messages file: /Users/grainier/NoBackup/iggy/test_logs/server__specific__segment_rotation_scenario_ebe5acb3/server_0_local_data/streams/0/topics/0/partitions/0/00000000000000004550.log. Too many open files (os error 24)
2026-03-13T13:25:37.088363Z ERROR shard-0 server::websocket::connection_handler: Command failed for session: client ID: 1004445935, user ID: 0, IP address: 127.0.0.1:57411, error: Cannot read file.
2026-03-13T13:25:37.088501Z ERROR shard-1 err_trail: Failed to open index file: /Users/grainier/NoBackup/iggy/test_logs/server__specific__segment_rotation_scenario_ebe5acb3/server_0_local_data/streams/0/topics/0/partitions/0/00000000000000004555.index. Too many open files (os error 24)
2026-03-13T13:25:37.088528Z ERROR shard-0 server::websocket::connection_handler: Command failed for session: client ID: 1838626354, user ID: 0, IP address: 127.0.0.1:57412, error: Cannot read file.

I also tried setting ulimit -n 10240 before running. Same result.

Environment:

- macOS 26.2, Apple M4, 24 GB RAM
- launchctl limit maxfiles: soft=256, hard=unlimited
- kern.maxfilesperproc: 92160
- Rust 1.94.0

Question:

1. Is this known? and Is there a recommended macOS FD limit config for running the test suite?

[hubcio]

AFAIK on linux on my PC this test uses around 20-30k FDs. we can reduce the time that it runs (right now it's 10s, see top of the file) - this should reduce the total FDs. can you test it with time set to e.g. 2s and check if it helped?

[grainier]

Thanks. Setting const TEST_DURATION_SECS: u64 = 2; worked.