*: remove the tombstone store metrics (tikv#7504)

ref tikv#5839

Signed-off-by: Ryan Leung <rleungx@gmail.com>

pkg/mcs/scheduling/server/meta/watcher.go

@@ -16,12 +16,14 @@ package meta
 
 import (
  "context"
+ "strconv"
  "sync"
 
  "github.com/gogo/protobuf/proto"
  "github.com/pingcap/kvproto/pkg/metapb"
  "github.com/pingcap/log"
  "github.com/tikv/pd/pkg/core"
+ "github.com/tikv/pd/pkg/statistics"
  "github.com/tikv/pd/pkg/storage/endpoint"
  "github.com/tikv/pd/pkg/utils/etcdutil"
  "go.etcd.io/etcd/clientv3"
@@ -79,9 +81,15 @@ func (w *Watcher) initializeStoreWatcher() error {
  origin := w.basicCluster.GetStore(store.GetId())
  if origin == nil {
  w.basicCluster.PutStore(core.NewStoreInfo(store))
- return nil
+ } else {
+ w.basicCluster.PutStore(origin.Clone(core.SetStoreMeta(store)))
  }
- w.basicCluster.PutStore(origin.Clone(core.SetStoreMeta(store)))
+
+ if store.GetNodeState() == metapb.NodeState_Removed {
+ statistics.ResetStoreStatistics(store.GetAddress(), strconv.FormatUint(store.GetId(), 10))
+ // TODO: remove hot stats
+ }
+
  return nil
  }
  deleteFn := func(kv *mvccpb.KeyValue) error {