Method enterIdleMode

clientconn.go:439–469

enterIdleMode puts the channel in idle mode, and as part of it shuts down the name resolver, load balancer, and any subchannels. This should never be called directly; use cc.idlenessMgr.EnterIdleMode instead.

()

// name resolver, load balancer, and any subchannels.  This should never be
// called directly; use cc.idlenessMgr.EnterIdleMode instead.
func (cc *ClientConn) enterIdleMode() {
	cc.mu.Lock()

	if cc.conns == nil {
		cc.mu.Unlock()
		return
	}

	conns := cc.conns

	rWrapper := cc.resolverWrapper
	rWrapper.close()
	cc.pickerWrapper.reset()
	bWrapper := cc.balancerWrapper
	bWrapper.close()
	cc.csMgr.updateState(connectivity.Idle)
	cc.addTraceEvent("entering idle mode")

	cc.initIdleStateLocked()

	cc.mu.Unlock()

	// Block until the name resolver and LB policy are closed.
	<-rWrapper.serializer.Done()
	<-bWrapper.serializer.Done()

	// Close all subchannels after the LB policy is closed.
	for ac := range conns {
		ac.tearDown(errConnIdling)
	}
}

// validateTransportCredentials performs a series of checks on the configured
// transport credentials. It returns a non-nil error if any of these conditions