diff --git a/app/dispatcher/default.go b/app/dispatcher/default.go
index ec81b3fe..b329292c 100644
--- a/app/dispatcher/default.go
+++ b/app/dispatcher/default.go
@@ -391,14 +391,14 @@ func sniffer(ctx context.Context, cReader *cachedReader, metadataOnly bool, netw
 					case common.ErrNoClue: // No Clue: protocol not matches, and sniffer cannot determine whether there will be a match or not
 						totalAttempt++
 					case protocol.ErrProtoNeedMoreData: // Protocol Need More Data: protocol matches, but need more data to complete sniffing
-						totalAttempt++
+						break
 					default:
 						return result, err
 					}
 				} else {
 					return nil, io.EOF
 				}
-				if totalAttempt >= 32 || cacheDeadline <= 0 {
+				if totalAttempt >= 2 || cacheDeadline <= 0 {
 					return nil, errSniffingTimeout
 				}
 			}