Flaky test in approval-distribution

[kianenigma]

See: https://gitlab.parity.io/parity/mirrors/polkadot/-/jobs/1530940 from the totally unrelated #5405

cc @drahnr @eskimor

[eskimor]

LOL, I have to reduce that timeout to 1 microsecond to reproduce locally. Either those CI machines must be under really heavy load for a 100ms timeout to hit or something else weird is going on. I guess real heavy load, with context switches can explain even 100000x slower execution. 🤷 Will nevertheless have a closer look, whether it could also be something else.

[eskimor]

Nope, it really seems to be that slow. I'll increase the timeout some more to make it even less likely to hit.

[eskimor]

If this keeps being a problem, we might also increase the channel capacity a bit:

polkadot/node/subsystem-test-helpers/src/lib.rs

Line 239 in 88d66ac

pub tx: SingleItemSink<FromOverseer<M>>,

[eskimor]

#5427