CB2 stays half open forever after being tripped open once

[v-yarotsky]

Hi It looks like CB2 can never become fully closed after being opened once. Here's a failing test.

The rolling window strategy's #half_open? is pretty much the opposite of #open?, which is not what it is supposed to represent.

I was thinking of having a success callback in a strategy, which would reset last_open if the circuit breaker is currently half-open. This would solve the issue in a single-threaded case, although in a hacky manner, but there are going to be issues with concurrent clients (cranking up number of WORKERS in the test to 50 or so exposes the issue).

[jphenow]

I think this is closeable now?

[victorhazbun]

@pedro

[prognostikos]

Looks like this was fixed in v0.0.3