This is an automated cherry-pick of pingcap#49518

Signed-off-by: ti-chi-bot <[email protected]>

Author: mittalrishabh

br/pkg/lightning/backend/local/local.go

@@ -1352,8 +1352,22 @@ func (local *local) writeAndIngestByRange(
 
 	var regions []*split.RegionInfo
 	var err error
+<<<<<<< HEAD
 	ctx, cancel := context.WithCancel(ctxt)
 	defer cancel()
+=======
+	// split region by given ranges
+	failpoint.Inject("failToSplit", func(_ failpoint.Value) {
+		needSplit = true
+	})
+	logger := log.FromContext(ctx).With(zap.String("uuid", engine.ID())).Begin(zap.InfoLevel, "split and scatter ranges")
+	backOffTime := 10 * time.Second
+	maxbackoffTime := 120 * time.Second
+	for i := 0; i < maxRetryTimes; i++ {
+		failpoint.Inject("skipSplitAndScatter", func() {
+			failpoint.Break()
+		})
+>>>>>>> 2a564d4a8ca (Lightning: increase backoff if split fails (#49518))
 
 WriteAndIngest:
 	for retry := 0; retry < maxRetryTimes; {
@@ -1400,6 +1414,23 @@ WriteAndIngest:
 			}
 		}
 
+<<<<<<< HEAD
+=======
+		log.FromContext(ctx).Warn("split and scatter failed in retry", zap.String("engine ID", engine.ID()),
+			log.ShortError(err), zap.Int("retry", i))
+		select {
+		case <-time.After(backOffTime):
+		case <-ctx.Done():
+			return ctx.Err()
+		}
+		backOffTime *= 2
+		if backOffTime > maxbackoffTime {
+			backOffTime = maxbackoffTime
+		}
+	}
+	logger.End(zap.ErrorLevel, err)
+	if err != nil {
+>>>>>>> 2a564d4a8ca (Lightning: increase backoff if split fails (#49518))
 		return err
 	}