diff --git a/server/jccommon/dbutils.go b/server/jccommon/dbutils.go
index 52012f67..fdaf41d5 100644
--- a/server/jccommon/dbutils.go
+++ b/server/jccommon/dbutils.go
@@ -3,7 +3,7 @@ package jccommon
 import (
 )
 
-func AddDbLog(dataSource string, logType int32, subType int32,
+func AddDbLog(dataSource string, logType string, subType string,
 	params map[string]string) error {
 	return nil
 }
diff --git a/server/light_backtask/task/chain_activity.go b/server/light_backtask/task/chain_activity.go
index 3fa8aa16..0653f320 100644
--- a/server/light_backtask/task/chain_activity.go
+++ b/server/light_backtask/task/chain_activity.go
@@ -10,8 +10,6 @@ import (
 	"strings"
 )
 
-const DBPARAM_CHAIN_ACTIVITY_PRE = "chain_activity"
-
 type chainActivity struct {
 
 }
@@ -132,6 +130,14 @@ func (this* chainActivity) saveToDb(ds *f5.DataSet) bool {
 					return false
 				}
 			}
+		} else {
+			jccommon.AddDbLog(constant.BCEVENT_DB, "chainActivity", "returnValuesDecodeError",
+				map[string]string{
+					"param1": txhash,
+					"param2": netId,
+					"param3": eventName,
+					"param4": idx,
+				})
 		}
 	} else if eventName == "UnLock" {
 		p := new(unLockReturnValues)
@@ -182,6 +188,14 @@ func (this* chainActivity) saveToDb(ds *f5.DataSet) bool {
 					return false
 				}
 			}
+		} else {
+			jccommon.AddDbLog(constant.BCEVENT_DB, "chainActivity", "returnValuesDecodeError",
+				map[string]string{
+					"param1": txhash,
+					"param2": netId,
+					"param3": eventName,
+					"param4": idx,
+				})
 		}
 	} else {
 		panic(fmt.Sprintf("chainActivity unknow event_name %s", eventName))