diff --git a/pkg/schedule/handler/handler.go b/pkg/schedule/handler/handler.go
index 5068ee02d5f..fb19d80bfd7 100644
--- a/pkg/schedule/handler/handler.go
+++ b/pkg/schedule/handler/handler.go
@@ -1333,19 +1333,28 @@ func (h *Handler) BalanceKeyrange(data string) (string, error) {
 // CheckBalanceKeyrangeStatus returns the status of the balance-keyrange scheduler.
 func (h *Handler) CheckBalanceKeyrangeStatus() (any, error) {
 	sc, err := h.GetSchedulersController()
+	makeJsonResp := func(s string) any {
+		return struct {
+			Scheduling bool   `json:"scheduling"`
+			ErrMsg     string `json:"err_msg"`
+		}{
+			Scheduling: false,
+			ErrMsg:     s,
+		}
+	}
 	if err != nil {
-		return "", err
+		return makeJsonResp("Get scheduler control error"), err
 	}
 	s := sc.GetScheduler(types.BalanceKeyrangeScheduler.String())
 	if s == nil {
-		return "", nil
+		return makeJsonResp("No scheduler found"), nil
 	}
 	if s.IsDisable() {
-		return "", nil
+		return makeJsonResp("Scheduler disabled"), nil
 	}
 	st := sc.GetSchedulerStatus(types.BalanceKeyrangeScheduler.String())
 	if st == nil {
-		return "", nil
+		return makeJsonResp("can't get scheduler status"), nil
 	}
 	return st, nil
 }
diff --git a/pkg/schedule/schedulers/balance_keyrange.go b/pkg/schedule/schedulers/balance_keyrange.go
index f23943d3f30..4e5b60c2449 100644
--- a/pkg/schedule/schedulers/balance_keyrange.go
+++ b/pkg/schedule/schedulers/balance_keyrange.go
@@ -359,11 +359,13 @@ func (s *balanceKeyrangeScheduler) GetStatus() any {
 			RunningOps []*OperatorWrapper `json:"running"`
 			Pending    []*OperatorWrapper `json:"pending"`
 			TotalCount int                `json:"total"`
+			ErrMsg     string             `json:"err_msg"`
 		}{
 			Scheduling: scheduling,
 			RunningOps: running,
 			Pending:    pending,
 			TotalCount: total,
+			ErrMsg:     "",
 		}
 		return j
 	}
diff --git a/pkg/schedule/schedulers/balance_keyrange_test.go b/pkg/schedule/schedulers/balance_keyrange_test.go
index fd8066a55fa..2588c4d78e6 100644
--- a/pkg/schedule/schedulers/balance_keyrange_test.go
+++ b/pkg/schedule/schedulers/balance_keyrange_test.go
@@ -247,7 +247,7 @@ func assertValidateMigrationPlan(re *require.Assertions, ops []*MigrationOp, sto
 		storesIn[op.ToStore] += len(op.Regions)
 		storesOut[op.FromStore] += len(op.Regions)
 		// For each region in migration plan, it no longer exists in FromStore, and exists in ToStore
-		for rid, _ := range op.Regions {
+		for rid := range op.Regions {
 			inTo := false
 			inFr := false
 			r, ok := regionMap[rid]
@@ -281,7 +281,7 @@ type regionStoresPair struct {
 
 func buildRedistributeRegionsTestCases(storeIDs []uint64, regionDist []regionStoresPair) ([]*metapb.Store, []*core.RegionInfo) {
 	storeIdLabels := []uint64{}
-	for _ = range storeIDs {
+	for range storeIDs {
 		storeIdLabels = append(storeIdLabels, 0)
 	}
 	return buildRedistributeRegionsTestCasesWithLabel(storeIDs, storeIdLabels, regionDist)
diff --git a/server/api/region.go b/server/api/region.go
index 978c81a102b..3b5010a4be8 100644
--- a/server/api/region.go
+++ b/server/api/region.go
@@ -133,7 +133,6 @@ func (h *regionsHandler) CheckRegionsReplicated(w http.ResponseWriter, r *http.R
 
 // @Tags     region
 // @Summary
-// @Accept   json
 // @Param    start_key  body  string  true  "Regions start key, hex encoded"
 // @Param    end_key    body  string  true  "Regions end key, hex encoded"
 // @Param    batch_size  body  string  true  "Maximum operators scheduled in one"