swarm/network/stream: Debug log instead of Warn for retrieval failure (#18246)

Author: holisticode

swarm/network/stream/delivery.go

@@ -39,6 +39,7 @@ const (
 var (
 	processReceivedChunksCount    = metrics.NewRegisteredCounter("network.stream.received_chunks.count", nil)
 	handleRetrieveRequestMsgCount = metrics.NewRegisteredCounter("network.stream.handle_retrieve_request_msg.count", nil)
+	retrieveChunkFail             = metrics.NewRegisteredCounter("network.stream.retrieve_chunks_fail.count", nil)
 
 	requestFromPeersCount     = metrics.NewRegisteredCounter("network.stream.request_from_peers.count", nil)
 	requestFromPeersEachCount = metrics.NewRegisteredCounter("network.stream.request_from_peers_each.count", nil)
@@ -169,7 +170,8 @@ func (d *Delivery) handleRetrieveRequestMsg(ctx context.Context, sp *Peer, req *
 	go func() {
 		chunk, err := d.chunkStore.Get(ctx, req.Addr)
 		if err != nil {
-			log.Warn("ChunkStore.Get can not retrieve chunk", "peer", sp.ID().String(), "addr", req.Addr, "hopcount", req.HopCount, "err", err)
+			retrieveChunkFail.Inc(1)
+			log.Debug("ChunkStore.Get can not retrieve chunk", "peer", sp.ID().String(), "addr", req.Addr, "hopcount", req.HopCount, "err", err)
 			return
 		}
 		if req.SkipCheck {