function halfOpenWait(item, ctx) {
		item.state = C.CIRCUIT_HALF_OPEN_WAIT;
		item.ep.state = false;

		// Anti-stick protection
		item.cbTimer = setTimeout(() => halfOpen(item, ctx), item.opts.halfOpenTime);
		item.cbTimer.unref();
	}
Change circuit-breaker status to half-open waiting. First request is invoked after half-open.

@param {Object} item
@param {Context} ctx