downsampling_by_keyexpr_test investigation

[milyin]

[Mallets]

I manage to reproduce the test failure quite consistently while doing code coverage with:

cargo llvm-cov --test interceptors

Output:

running 3 tests
test downsampling_config_error_wrong_strategy - should panic ... ok
test downsampling_by_keyexpr ... FAILED
test downsampling_by_interface ... ok

failures:

---- downsampling_by_keyexpr stdout ----
thread 'downsampling_by_keyexpr' panicked at zenoh/tests/interceptors.rs:132:17:
The test failed on the ke`test/downsamples_by_keyexp/20hz` at the rate of 0

Sometimes I also get:

running 3 tests
test downsampling_config_error_wrong_strategy - should panic ... ok
test downsampling_by_interface ... FAILED
test downsampling_by_keyexpr ... ok

failures:

---- downsampling_by_interface stdout ----
thread 'downsampling_by_interface' panicked at zenoh/tests/interceptors.rs:132:17:
The test failed on the ke`test/downsamples_by_interface/10hz` at the rate of 0


failures:
    downsampling_by_interface

test result: FAILED. 2 passed; 1 failed; 0 ignored; 0 measured; 0 filtered out; finished in 7.05s

Zenoh:

• Branch: dev/1.0.0
• Commit: 655922d85124c59281f5a5b4c798156e5268fc91

Target platform:

• MacBook Pro
• CPU: Apple M3 Pro
• OS: Sonoma 14.4.1

[Mallets]

Chiming in @sashacmc