scheduler: fix data race test in evict_stopping_store scheduler (#9828)

close #9812

change the stopping state to atomic variable

Signed-off-by: hujiatao0 <hhjjtt110@gmail.com>

Author: hujiatao0

pkg/core/store.go

@@ -63,6 +63,7 @@ type StoreInfo struct {
 	pauseLeaderTransferOut atomic.Int64 // not allow to be used as source of transfer leader
 	slowStoreEvicted       atomic.Int64 // this store has been evicted as a slow store, should not transfer leader to it
 	slowTrendEvicted       atomic.Int64 // this store has been evicted as a slow store by trend, should not transfer leader to it
+	stoppingStoreEvicted   atomic.Int64 // this store has been evicted as a stopping store, should not transfer leader to it
 	leaderCount            int
 	regionCount            int
 	learnerCount           int
@@ -137,6 +138,7 @@ func (s *StoreInfo) Clone(opts ...StoreCreateOption) *StoreInfo {
 	store.pauseLeaderTransferOut.Store(s.pauseLeaderTransferOut.Load())
 	store.slowStoreEvicted.Store(s.slowStoreEvicted.Load())
 	store.slowTrendEvicted.Store(s.slowTrendEvicted.Load())
+	store.stoppingStoreEvicted.Store(s.stoppingStoreEvicted.Load())
 	for _, opt := range opts {
 		if opt != nil {
 			opt(store)
@@ -183,6 +185,7 @@ func (s *StoreInfo) ShallowClone(opts ...StoreCreateOption) *StoreInfo {
 	store.pauseLeaderTransferOut.Store(s.pauseLeaderTransferOut.Load())
 	store.slowStoreEvicted.Store(s.slowStoreEvicted.Load())
 	store.slowTrendEvicted.Store(s.slowTrendEvicted.Load())
+	store.stoppingStoreEvicted.Store(s.stoppingStoreEvicted.Load())
 	for _, opt := range opts {
 		opt(store)
 	}
@@ -208,7 +211,7 @@ func (s *StoreInfo) EvictedAsSlowStore() bool {
 
 // EvictedAsStoppingStore returns if the store should be evicted as a stopping store.
 func (s *StoreInfo) EvictedAsStoppingStore() bool {
-	return s.rawStats.IsStopping
+	return s.stoppingStoreEvicted.Load() > 0
 }
 
 // IsEvictedAsSlowTrend returns if the store should be evicted as a slow store by trend.

pkg/core/store_option.go

@@ -146,7 +146,7 @@ func SlowStoreEvicted() StoreCreateOption {
 // leader to the store
 func StoppingStoreEvicted() StoreCreateOption {
 	return func(store *StoreInfo) {
-		store.rawStats.IsStopping = true
+		store.stoppingStoreEvicted.Add(1)
 	}
 }
 
@@ -175,7 +175,7 @@ func SlowStoreRecovered() StoreCreateOption {
 // StoppingStoreRecovered cleans the evicted state of a store.
 func StoppingStoreRecovered() StoreCreateOption {
 	return func(store *StoreInfo) {
-		store.rawStats.IsStopping = false
+		store.stoppingStoreEvicted.Add(-1)
 	}
 }