ko1 / atdot.net wrote:
> With parallel tests (`make test-all TESTS=-j4` with 4 parallelism) stuck sometimes.
> 
> http://ci.rvm.jp/results/trunk-test@ruby-sky3/1087178
> 
> We can see this stuck very old revisions but not sure how to solve...

I've never seen it stuck myself.

Is UDP over loopback supposed to be reliable?

I would not expect it to be (but am not sure), I think it's
possible the kernel could drop packets if under memory pressure.

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