From 4ede084b8f73860c64befa879d803bc23fc53a20 Mon Sep 17 00:00:00 2001
From: Yogesh Mahajan <yogesh.mahajan@enterprisedb.com>
Date: Tue, 18 Apr 2023 17:54:21 +0530
Subject: [PATCH] Fixed error occurring while logging out from pgAdmin keeping
 a query tool opened. #6120

---
 web/pgadmin/utils/locker.py | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/web/pgadmin/utils/locker.py b/web/pgadmin/utils/locker.py
index b543da5c5..45666714c 100644
--- a/web/pgadmin/utils/locker.py
+++ b/web/pgadmin/utils/locker.py
@@ -33,7 +33,8 @@ class ConnectionLocker:
             self.lock.acquire()
             current_app.logger.info("Acquired a lock.")
 
-            if session['auth_source_manager']['current_source'] == \
+            if 'auth_source_manager' in session and \
+                session['auth_source_manager']['current_source'] == \
                 KERBEROS and 'KRB5CCNAME' in session \
                     and self.is_kerberos_conn:
                 environ['KRB5CCNAME'] = session['KRB5CCNAME']