balancer: reduce chattiness (#1608)

Remove some log messages from balancer_conn_wrappers and
balancer_v1_wrapper which seem to be indented for debugging (one of them
was even logging a pointer address).

They can produce a lot of log messages which don't add value in a normal
scenario.

balancer_conn_wrappers.go

@@ -183,7 +183,6 @@ func (ccb *ccBalancerWrapper) handleResolvedAddrs(addrs []resolver.Address, err
 }
 
 func (ccb *ccBalancerWrapper) NewSubConn(addrs []resolver.Address, opts balancer.NewSubConnOptions) (balancer.SubConn, error) {
- grpclog.Infof("ccBalancerWrapper: new subconn: %v", addrs)
  ac, err := ccb.cc.newAddrConn(addrs)
  if err != nil {
  return nil, err
@@ -197,7 +196,6 @@ func (ccb *ccBalancerWrapper) NewSubConn(addrs []resolver.Address, opts balancer
 }
 
 func (ccb *ccBalancerWrapper) RemoveSubConn(sc balancer.SubConn) {
- grpclog.Infof("ccBalancerWrapper: removing subconn")
  acbw, ok := sc.(*acBalancerWrapper)
  if !ok {
  return
@@ -207,7 +205,6 @@ func (ccb *ccBalancerWrapper) RemoveSubConn(sc balancer.SubConn) {
 }
 
 func (ccb *ccBalancerWrapper) UpdateBalancerState(s connectivity.State, p balancer.Picker) {
- grpclog.Infof("ccBalancerWrapper: updating state and picker called by balancer: %v, %p", s, p)
  ccb.cc.csMgr.updateState(s)
  ccb.cc.blockingpicker.updatePicker(p)
 }
@@ -224,7 +221,6 @@ type acBalancerWrapper struct {
 }
 
 func (acbw *acBalancerWrapper) UpdateAddresses(addrs []resolver.Address) {
- grpclog.Infof("acBalancerWrapper: UpdateAddresses called with %v", addrs)
  acbw.mu.Lock()
  defer acbw.mu.Unlock()
  if !acbw.ac.tryUpdateAddrs(addrs) {

balancer_v1_wrapper.go

@@ -97,7 +97,6 @@ type balancerWrapper struct {
 // connections accordingly.
 func (bw *balancerWrapper) lbWatcher() {
  <-bw.startCh
- grpclog.Infof("balancerWrapper: is pickfirst: %v\n", bw.pickfirst)
  notifyCh := bw.balancer.Notify()
  if notifyCh == nil {
  // There's no resolver in the balancer. Connect directly.
@@ -230,7 +229,6 @@ func (bw *balancerWrapper) lbWatcher() {
 }
 
 func (bw *balancerWrapper) HandleSubConnStateChange(sc balancer.SubConn, s connectivity.State) {
- grpclog.Infof("balancerWrapper: handle subconn state change: %p, %v", sc, s)
  bw.mu.Lock()
  defer bw.mu.Unlock()
  scSt, ok := bw.connSt[sc]