diff --git a/server/light_backtask/task/chain_activity.go b/server/light_backtask/task/chain_activity.go
index 2b19a68b..111a2d66 100644
--- a/server/light_backtask/task/chain_activity.go
+++ b/server/light_backtask/task/chain_activity.go
@@ -52,7 +52,7 @@ func (this* chainActivity) processLockAndUnLockEvent(netId int32, lockContractAd
 				sql := fmt.Sprintf(`
 SELECT * FROM t_blockchain_event
 WHERE idx > %d AND idx <= %d AND net_id = %d AND contract_address = ? AND event_name IN (?, ?)
-ORDER BY idx LIMIT 10
+ORDER BY idx LIMIT 1000
 `,
 					lastIdx,
 					maxIdx,
@@ -143,8 +143,8 @@ func (this* chainActivity) saveToDb(ds *f5.DataSet) bool {
 		}
 	} else if eventName == "UnLock" {
 		p := new(unLockReturnValues)
-		sender := q5.SafeToString(p.User)
 		if q5.DecodeJson(returnValues, p) == nil {
+			sender := q5.SafeToString(p.User)
 			decodeJsonOk = true
 			for _, nft := range p.NftList {
 				if len(nft) != 3 {
diff --git a/server/light_backtask/task/taskmgr.go b/server/light_backtask/task/taskmgr.go
index ec15dcea..d359400c 100644
--- a/server/light_backtask/task/taskmgr.go
+++ b/server/light_backtask/task/taskmgr.go
@@ -19,13 +19,13 @@ func (this *taskMgr) Init() {
 	this.sysMail.init()
 	this.repairOrder.init()
 	//this.refreshMeta.init()
-	this.contribution.init()
+	//this.contribution.init()
 	this.chainActivity.init()
 }
 
 func (this *taskMgr) UnInit() {
 	this.chainActivity.unInit()
-	this.contribution.unInit()
+	//this.contribution.unInit()
 	//this.refreshMeta.unInit()
 	this.repairOrder.unInit()
 	this.sysMail.unInit()