add debug info

src/common/logger.hpp

@@ -97,7 +97,14 @@ class Logger {
   }
 
   Logger() {}
-  ~Logger() {}
+  ~Logger() {
+    if (m_udr_app) delete m_udr_app;
+    if (m_config) delete m_config;
+    if (m_system) delete m_system;
+    if (m_udr_server) delete m_udr_server;
+    if (m_udr_nrf) delete m_udr_nrf;
+    if (m_udr_mysql) delete m_udr_mysql;
+  }
 
   void _init(const char* app, const bool log_stdout, const bool log_rot_file);
 

src/udr_app/mysql_db.cpp

@@ -82,6 +82,8 @@ bool mysql_db::connect(uint32_t num_retries) {
       i++;
       // throw std::runtime_error("Cannot connect to MySQL DB");
     } else {
+      Logger::udr_mysql().info(
+          "Connected to MySQL DB: %s:", mysql_error(&mysql_connector));
       return true;
     }
     std::this_thread::sleep_for(std::chrono::milliseconds(100));