From 000d49f9bfed412be978d995ecdb88cf9d412ecf Mon Sep 17 00:00:00 2001
From: Bryan Van de Ven <bryan@bokeh.org>
Date: Mon, 22 Jul 2024 08:12:09 -0700
Subject: [PATCH] improve session expiry error message (#13991)

---
 src/bokeh/server/views/ws.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/bokeh/server/views/ws.py b/src/bokeh/server/views/ws.py
index 1941b84c0c7..48d5560e382 100644
--- a/src/bokeh/server/views/ws.py
+++ b/src/bokeh/server/views/ws.py
@@ -146,7 +146,7 @@ def open(self) -> None:
             raise ProtocolError("Session expiry has not been provided")
         elif now >= payload['session_expiry']:
             self.close()
-            raise ProtocolError("Token is expired.")
+            raise ProtocolError("Token is expired. Configure the app with a larger value for --session-token-expiration if necessary")
         elif not check_token_signature(token,
                                        signed=self.application.sign_sessions,
                                        secret_key=self.application.secret_key):