From 2c0905919ffbe63f34c2d0eb9b668b2eaf97752d Mon Sep 17 00:00:00 2001
From: DaZuiZui <y51288033@outlook.com>
Date: Fri, 24 Jul 2026 16:11:28 +0800
Subject: [PATCH] fix(proxy): return 503 when database connections are
 exhausted

---
 litellm/proxy/db/exception_handler.py                    | 5 +++++
 .../proxy/auth/test_auth_exception_handler.py            | 9 +++++++++
 2 files changed, 14 insertions(+)

diff --git a/litellm/proxy/db/exception_handler.py b/litellm/proxy/db/exception_handler.py
index e4c565e4464..59775d2dd73 100644
--- a/litellm/proxy/db/exception_handler.py
+++ b/litellm/proxy/db/exception_handler.py
@@ -195,6 +195,11 @@ class PrismaDBExceptionHandler:
         """
         import asyncio
 
+        from prisma.errors import DataError
+
+        if isinstance(e, DataError) and e.code == "P2037":
+            return True
+
         if PrismaDBExceptionHandler.is_database_connection_error(e):
             return True
         if PrismaDBExceptionHandler.is_database_transport_error(e):
diff --git a/tests/test_litellm/proxy/auth/test_auth_exception_handler.py b/tests/test_litellm/proxy/auth/test_auth_exception_handler.py
index 11e6f483e35..2ab0a842b80 100644
--- a/tests/test_litellm/proxy/auth/test_auth_exception_handler.py
+++ b/tests/test_litellm/proxy/auth/test_auth_exception_handler.py
@@ -122,6 +122,15 @@ async def test_handle_authentication_error_data_layer_errors_do_not_fall_back(
         OSError("network is unreachable"),
         HTTPClientClosedError(),
         PrismaError("can't reach database server"),
+        DataError(
+            data={
+                "user_facing_error": {
+                    "error_code": "P2037",
+                    "message": "Too many database connections opened: FATAL: sorry, too many clients already",
+                    "meta": {"database_error": "FATAL: sorry, too many clients already"},
+                }
+            }
+        ),
         RawQueryError(
             data={
                 "user_facing_error": {