diff --git a/app.js b/app.js
index f548c70..431857b 100644
--- a/app.js
+++ b/app.js
@@ -67,6 +67,12 @@ function registerDb(name, options) {
 }
 
 function getDbConn(name) {
+  /*try {
+    throw new Error(1111);
+  } catch (err) {
+    console.log(err.stack);
+  }*/
+  console.log('getDbConn', name);
   const ret = {
     err: null,
     conn: null,