diff --git a/br/pkg/conn/BUILD.bazel b/br/pkg/conn/BUILD.bazel
index fc88f174394f3..f6065e6757506 100644
--- a/br/pkg/conn/BUILD.bazel
+++ b/br/pkg/conn/BUILD.bazel
@@ -57,5 +57,6 @@ go_test(
         "@org_golang_google_grpc//codes",
         "@org_golang_google_grpc//status",
         "@org_uber_go_goleak//:goleak",
+        "@org_uber_go_multierr//:multierr",
     ],
 )
diff --git a/br/pkg/conn/conn.go b/br/pkg/conn/conn.go
index 9cb3c4dc1c6fa..38461c4dd5652 100644
--- a/br/pkg/conn/conn.go
+++ b/br/pkg/conn/conn.go
@@ -81,16 +81,20 @@ func GetAllTiKVStoresWithRetry(ctx context.Context,
 		func() error {
 			stores, err = util.GetAllTiKVStores(ctx, pdClient, storeBehavior)
 			failpoint.Inject("hint-GetAllTiKVStores-error", func(val failpoint.Value) {
+				logutil.CL(ctx).Debug("failpoint hint-GetAllTiKVStores-error injected.")
 				if val.(bool) {
-					logutil.CL(ctx).Debug("failpoint hint-GetAllTiKVStores-error injected.")
 					err = status.Error(codes.Unknown, "Retryable error")
+				} else {
+					err = context.Canceled
 				}
 			})
 
 			failpoint.Inject("hint-GetAllTiKVStores-cancel", func(val failpoint.Value) {
+				logutil.CL(ctx).Debug("failpoint hint-GetAllTiKVStores-cancel injected.")
 				if val.(bool) {
-					logutil.CL(ctx).Debug("failpoint hint-GetAllTiKVStores-cancel injected.")
 					err = status.Error(codes.Canceled, "Cancel Retry")
+				} else {
+					err = context.Canceled
 				}
 			})
 
diff --git a/br/pkg/conn/conn_test.go b/br/pkg/conn/conn_test.go
index fc822fac123d9..d9544cb32eafc 100644
--- a/br/pkg/conn/conn_test.go
+++ b/br/pkg/conn/conn_test.go
@@ -18,12 +18,13 @@ import (
 	"github.com/pingcap/tidb/br/pkg/pdutil"
 	"github.com/pingcap/tidb/br/pkg/utils"
 	"github.com/stretchr/testify/require"
+	"go.uber.org/multierr"
 	"google.golang.org/grpc/codes"
 	"google.golang.org/grpc/status"
 )
 
 func TestGetAllTiKVStoresWithRetryCancel(t *testing.T) {
-	_ = failpoint.Enable("github.com/pingcap/tidb/br/pkg/conn/hint-GetAllTiKVStores-cancel", "return(true)")
+	_ = failpoint.Enable("github.com/pingcap/tidb/br/pkg/conn/hint-GetAllTiKVStores-cancel", "1*return(true)->1*return(false)")
 	defer func() {
 		_ = failpoint.Disable("github.com/pingcap/tidb/br/pkg/conn/hint-GetAllTiKVStores-cancel")
 	}()
@@ -59,11 +60,13 @@ func TestGetAllTiKVStoresWithRetryCancel(t *testing.T) {
 
 	_, err := GetAllTiKVStoresWithRetry(ctx, fpdc, util.SkipTiFlash)
 	require.Error(t, err)
-	require.Equal(t, codes.Canceled, status.Code(errors.Cause(err)))
+	errs := multierr.Errors(err)
+	require.Equal(t, 2, len(errs))
+	require.Equal(t, codes.Canceled, status.Code(errors.Cause(errs[0])))
 }
 
 func TestGetAllTiKVStoresWithUnknown(t *testing.T) {
-	_ = failpoint.Enable("github.com/pingcap/tidb/br/pkg/conn/hint-GetAllTiKVStores-error", "return(true)")
+	_ = failpoint.Enable("github.com/pingcap/tidb/br/pkg/conn/hint-GetAllTiKVStores-error", "1*return(true)->1*return(false)")
 	defer func() {
 		_ = failpoint.Disable("github.com/pingcap/tidb/br/pkg/conn/hint-GetAllTiKVStores-error")
 	}()
@@ -99,7 +102,9 @@ func TestGetAllTiKVStoresWithUnknown(t *testing.T) {
 
 	_, err := GetAllTiKVStoresWithRetry(ctx, fpdc, util.SkipTiFlash)
 	require.Error(t, err)
-	require.Equal(t, codes.Unknown, status.Code(errors.Cause(err)))
+	errs := multierr.Errors(err)
+	require.Equal(t, 2, len(errs))
+	require.Equal(t, codes.Unknown, status.Code(errors.Cause(errs[0])))
 }
 func TestCheckStoresAlive(t *testing.T) {
 	ctx, cancel := context.WithCancel(context.Background())
@@ -397,14 +402,18 @@ func TestGetMergeRegionSizeAndCount(t *testing.T) {
 		},
 	}
 
-	ctx := context.Background()
+	pctx := context.Background()
 	for _, ca := range cases {
+		ctx, cancel := context.WithCancel(pctx)
 		pdCli := utils.FakePDClient{Stores: ca.stores}
 		require.Equal(t, len(ca.content), len(ca.stores))
 		count := 0
 		mockServer := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
 			switch strings.TrimSpace(r.URL.Path) {
 			case "/config":
+				if len(ca.content[count]) == 0 {
+					cancel()
+				}
 				_, _ = fmt.Fprint(w, ca.content[count])
 			default:
 				http.NotFoundHandler().ServeHTTP(w, r)
diff --git a/br/pkg/restore/client.go b/br/pkg/restore/client.go
index 21e92c0a0e694..cadd5ad40d226 100644
--- a/br/pkg/restore/client.go
+++ b/br/pkg/restore/client.go
@@ -1170,12 +1170,14 @@ func (rc *Client) RestoreSSTFiles(
 	for rangeFiles, leftFiles = drainFilesByRange(files, rc.fileImporter.supportMultiIngest); len(rangeFiles) != 0; rangeFiles, leftFiles = drainFilesByRange(leftFiles, rc.fileImporter.supportMultiIngest) {
 		filesReplica := rangeFiles
 		rc.workerPool.ApplyOnErrorGroup(eg,
-			func() error {
+			func() (err error) {
 				fileStart := time.Now()
 				defer func() {
-					log.Info("import files done", logutil.Files(filesReplica),
-						zap.Duration("take", time.Since(fileStart)))
-					updateCh.Inc()
+					if err == nil {
+						log.Info("import files done", logutil.Files(filesReplica),
+							zap.Duration("take", time.Since(fileStart)))
+						updateCh.Inc()
+					}
 				}()
 				return rc.fileImporter.ImportSSTFiles(ectx, filesReplica, rewriteRules, rc.cipher, rc.backupMeta.ApiVersion)
 			})
diff --git a/br/pkg/utils/backoff.go b/br/pkg/utils/backoff.go
index d0a21d92b45e8..6d6120a0eea98 100644
--- a/br/pkg/utils/backoff.go
+++ b/br/pkg/utils/backoff.go
@@ -26,9 +26,9 @@ const (
 	downloadSSTWaitInterval    = 1 * time.Second
 	downloadSSTMaxWaitInterval = 4 * time.Second
 
-	resetTSRetryTime       = 16
+	resetTSRetryTime       = 32
 	resetTSWaitInterval    = 50 * time.Millisecond
-	resetTSMaxWaitInterval = 500 * time.Millisecond
+	resetTSMaxWaitInterval = 2 * time.Second
 
 	resetTSRetryTimeExt       = 600
 	resetTSWaitIntervalExt    = 500 * time.Millisecond
@@ -135,7 +135,6 @@ func NewDownloadSSTBackoffer() Backoffer {
 }
 
 func (bo *importerBackoffer) NextBackoff(err error) time.Duration {
-	log.Warn("retry to import ssts", zap.Int("attempt", bo.attempt), zap.Error(err))
 	// we don't care storeID here.
 	res := bo.errContext.HandleErrorMsg(err.Error(), 0)
 	if res.Strategy == RetryStrategy {
@@ -209,8 +208,12 @@ func (bo *pdReqBackoffer) NextBackoff(err error) time.Duration {
 		bo.delayTime = 2 * bo.delayTime
 		bo.attempt--
 	default:
+		// If the connection timeout, pd client would cancel the context, and return grpc context cancel error.
+		// So make the codes.Canceled retryable too.
+		// It's OK to retry the grpc context cancel error, because the parent context cancel returns context.Canceled.
+		// For example, cancel the `ectx` and then pdClient.GetTS(ectx) returns context.Canceled instead of grpc context canceled.
 		switch status.Code(e) {
-		case codes.DeadlineExceeded, codes.NotFound, codes.AlreadyExists, codes.PermissionDenied, codes.ResourceExhausted, codes.Aborted, codes.OutOfRange, codes.Unavailable, codes.DataLoss, codes.Unknown:
+		case codes.DeadlineExceeded, codes.Canceled, codes.NotFound, codes.AlreadyExists, codes.PermissionDenied, codes.ResourceExhausted, codes.Aborted, codes.OutOfRange, codes.Unavailable, codes.DataLoss, codes.Unknown:
 			bo.delayTime = 2 * bo.delayTime
 			bo.attempt--
 		default:
diff --git a/br/pkg/utils/backoff_test.go b/br/pkg/utils/backoff_test.go
index dc09826fd7806..aa5d048e90890 100644
--- a/br/pkg/utils/backoff_test.go
+++ b/br/pkg/utils/backoff_test.go
@@ -123,9 +123,12 @@ func TestPdBackoffWithRetryableError(t *testing.T) {
 		if counter == 2 {
 			return io.EOF
 		}
+		if counter == 6 {
+			return context.Canceled
+		}
 		return gRPCError
 	}, backoffer)
-	require.Equal(t, 16, counter)
+	require.Equal(t, 7, counter)
 	require.Equal(t, []error{
 		gRPCError,
 		gRPCError,
@@ -133,16 +136,7 @@ func TestPdBackoffWithRetryableError(t *testing.T) {
 		gRPCError,
 		gRPCError,
 		gRPCError,
-		gRPCError,
-		gRPCError,
-		gRPCError,
-		gRPCError,
-		gRPCError,
-		gRPCError,
-		gRPCError,
-		gRPCError,
-		gRPCError,
-		gRPCError,
+		context.Canceled,
 	}, multierr.Errors(err))
 }
 
diff --git a/br/tests/br_pitr/run.sh b/br/tests/br_pitr/run.sh
index afe400820eb7e..96faac6ef88ae 100644
--- a/br/tests/br_pitr/run.sh
+++ b/br/tests/br_pitr/run.sh
@@ -104,6 +104,8 @@ check_contains "restore log success summary"
 check_not_contains "rewrite delete range"
 echo "" > $res_file
 echo "check sql result"
+run_sql "select * from mysql.gc_delete_range"
+run_sql "select * from mysql.gc_delete_range_done"
 run_sql "select count(*) DELETE_RANGE_CNT from (select * from mysql.gc_delete_range union all select * from mysql.gc_delete_range_done) del_range group by ts order by DELETE_RANGE_CNT desc limit 1;"
 expect_delete_range=$(($incremental_delete_range_count-$prepare_delete_range_count))
 check_contains "DELETE_RANGE_CNT: $expect_delete_range"