diff --git a/server/web3helper/services/event_center.js b/server/web3helper/services/event_center.js
index de1b68e..b0b9a42 100644
--- a/server/web3helper/services/event_center.js
+++ b/server/web3helper/services/event_center.js
@@ -1,6 +1,7 @@
 const app = require('j7/app');
 const utils = require('j7/utils');
 const bcutils = require('j7/bcutils');
+const log = require('j7/log');
 const serviceFactory = require('./factory');
 const metaFactory = require('../metadata/factory');
 const bc = require('../blockchain');
@@ -64,7 +65,7 @@ class EventCenter {
           maxIdx = row['max_idx'];
         }
       }
-      while (Object.keys(this.pendingConfirmOwnerHash) > 50) {
+      while (Object.keys(this.pendingConfirmOwnerHash).length > 50) {
         await utils.sleep(1000 + utils.randRange(500, 1500));
       }
       await utils.sleep(2000 + utils.randRange(500, 1500));
diff --git a/server/web3helper/services/exec_confirm_owner.js b/server/web3helper/services/exec_confirm_owner.js
index 7971cea..9f36439 100644
--- a/server/web3helper/services/exec_confirm_owner.js
+++ b/server/web3helper/services/exec_confirm_owner.js
@@ -1,6 +1,7 @@
 const bcutils = require('j7/bcutils');
 const utils = require('j7/utils');
 const app = require('j7/app');
+const log = require('j7/log');
 const bc = require('../blockchain');
 
 class ExecConfirmOwner {
@@ -99,6 +100,7 @@ class ExecConfirmOwner {
 
   async getOwner() {
     const instanceName = this.getInstanceName();
+    //log.info('getOwner:' + instanceName + ' tryCount:' + this.tryCount);
     while (true) {
       await bc.lockQuery();
       try {