diff --git a/query/src/sessions/session_mgr.rs b/query/src/sessions/session_mgr.rs
index 683ca3761a3f..6c4cc952fb87 100644
--- a/query/src/sessions/session_mgr.rs
+++ b/query/src/sessions/session_mgr.rs
@@ -395,6 +395,8 @@ impl SessionManager {
             let mut config = self.conf.write();
             let config_file = config.config_file.clone();
             *config = Config::load_from_file(&config_file)?;
+            // ensure the environment variables are immutable
+            *config = Config::load_from_env(&config)?;
             config.config_file = config_file;
             config.clone()
         };