diff --git a/server/web3dbspider/services/pull_dbevent.js b/server/web3dbspider/services/pull_dbevent.js
index 334e4f8..3aa9001 100644
--- a/server/web3dbspider/services/pull_dbevent.js
+++ b/server/web3dbspider/services/pull_dbevent.js
@@ -78,7 +78,7 @@ class PullDbEvent extends BaseService {
           this.getContractAddress()
         ]);
       if (err) {
-        throw err;
+        throw new Error(err);
       }
       if (rows.length > 0) {
         await utils.serial(
@@ -94,6 +94,7 @@ class PullDbEvent extends BaseService {
       this.progInfo['lastIdx'] = this.lastIdx.toString();
       await this.saveLastIdx(this.lastIdx);
     } catch (err) {
+      utils.safeDumpErrStack(err);
       log.error(logHead + err);
       await utils.sleep(5000 + utils.randRange(1000, 3000));
     }