diff --git a/Config.go b/Config.go
index 7bae66c..1e58a93 100644
--- a/Config.go
+++ b/Config.go
@@ -132,6 +132,12 @@ func (conf *Config) Init() {
 	switch conf.AgentType {
 	case "btc":
 		conf.sessionFactory = new(SessionFactoryBTC)
+	case "etc":
+		fallthrough
+	case "ethw":
+		fallthrough
+	case "etf":
+		fallthrough
 	case "eth":
 		conf.sessionFactory = new(SessionFactoryETH)
 	default:
diff --git a/DownSessionETH.go b/DownSessionETH.go
index ee72cd2..803e5e2 100644
--- a/DownSessionETH.go
+++ b/DownSessionETH.go
@@ -386,14 +386,15 @@ func (down *DownSessionETH) handleRequest() {
 			return
 		}
 		if glog.V(11) {
-			glog.Info(down.id, "handleRequest: ", string(jsonBytes))
+			glog.Info(down.id, "handleRequest: ", string(jsonBytes), ", len=", len(jsonBytes), ", hex=", hex.EncodeToString(jsonBytes))
 		}
 
 		rpcData, err := NewJSONRPCLineETH(jsonBytes)
 
 		// ignore the json decode error
 		if err != nil {
-			glog.Warning(down.id, "failed to decode JSON from miner: ", err.Error(), "; ", string(jsonBytes))
+			glog.Warning(down.id, "failed to decode JSON from miner: ", err.Error(), "; ", string(jsonBytes), ", len=", len(jsonBytes), ", hex=", hex.EncodeToString(jsonBytes))
+			continue
 		}
 
 		down.SendEvent(EventRecvJSONRPCETH{rpcData, jsonBytes})