diff --git a/server/web3dbspider/services/pull_dbevent.js b/server/web3dbspider/services/pull_dbevent.js
index 38472f4..37d5625 100644
--- a/server/web3dbspider/services/pull_dbevent.js
+++ b/server/web3dbspider/services/pull_dbevent.js
@@ -19,6 +19,17 @@ class PullDbEvent extends BaseService {
       }
       PullDbEvent.#maxIdx = maxIdx;
     }
+    async () => {
+      while (true) {
+        const {err, maxIdx} = await conn.getMaxIdx('');
+        if (!err) {
+          PullDbEvent.#maxIdx = maxIdx;
+          await utils.sleep(500 + utils.randRange(500, 1500));
+        } else {
+          await utils.sleep(5000 + utils.randRange(500, 1500));
+        }
+      }
+    }();
   }
 
   async init(net, event) {