diff --git a/accountresolver/processor.go b/accountresolver/processor.go
index 3dc80443..454abd22 100644
--- a/accountresolver/processor.go
+++ b/accountresolver/processor.go
@@ -118,12 +118,15 @@ func (p *Processor) ProcessMergeBlocks(ctx context.Context, sourceStore dstore.S
 
 	err := sourceStore.WalkFrom(ctx, "", paddedBlockNum, func(filename string) error {
 		mbf := newMergeBlocksFile(filename, p.logger)
-		err := mbf.process(ctx, sourceStore, p.cursor)
-		if err != nil {
-			return fmt.Errorf("processing merge block file %s: %w", mbf.filename, err)
-		}
+		go func() {
+			err := mbf.process(ctx, sourceStore, p.cursor)
+			if err != nil {
+				panic(fmt.Errorf("processing merge block file %s: %w", mbf.filename, err))
+			}
+
+		}()
 		mergeBlocksFileChan <- mbf
-		return err
+		return nil
 	})
 
 	if err != nil {
@@ -182,6 +185,7 @@ func (f *mergeBlocksFile) process(ctx context.Context, sourceStore dstore.Store,
 			f.logger.Info("skip block", zap.Uint64("slot", blk.Slot))
 			continue
 		}
+		fmt.Println("mergeBlocksFile : pushing block", blk.Slot)
 		f.blockChan <- blk
 	}
 }
@@ -193,6 +197,7 @@ func (p *Processor) processMergeBlocksFiles(ctx context.Context, mergeBlocksFile
 	}
 
 	for mbf := range mergeBlocksFileChan {
+		p.logger.Info("Receive merge block file", zap.String("filename", mbf.filename))
 		bundleReader := NewBundleReader(ctx, p.logger)
 
 		nailer := dhammer.NewNailer(50, func(ctx context.Context, blk *pbsol.Block) (*bstream.Block, error) {