diff --git a/addons/website/models/ir_http.py b/addons/website/models/ir_http.py
index 78b2dc4052b..ebaaadc5575 100644
--- a/addons/website/models/ir_http.py
+++ b/addons/website/models/ir_http.py
@@ -64,7 +64,8 @@ class Http(models.AbstractModel):
 
     @classmethod
     def routing_map(cls, key=None):
-        key = key or (request and request.website_routing)
+        if not key and request:
+            key = request.website_routing
         return super(Http, cls).routing_map(key=key)
 
     @classmethod
@@ -82,6 +83,10 @@ class Http(models.AbstractModel):
 
     @classmethod
     def _generate_routing_rules(cls, modules, converters):
+        if not request:
+            yield from super()._generate_routing_rules(modules, converters)
+            return
+
         website_id = request.website_routing
         logger.debug("_generate_routing_rules for website: %s", website_id)
         domain = [('redirect_type', 'in', ('308', '404')), '|', ('website_id', '=', False), ('website_id', '=', website_id)]
diff --git a/addons/website/models/website.py b/addons/website/models/website.py
index e7c02af815f..b23594e8a96 100644
--- a/addons/website/models/website.py
+++ b/addons/website/models/website.py
@@ -1098,7 +1098,7 @@ class Website(models.Model):
                       of the same.
             :rtype: list({name: str, url: str})
         """
-        router = http.root.get_db_router(request.db)
+        router = self.env['ir.http'].routing_map()
         url_set = set()
 
         sitemap_endpoint_done = set()
diff --git a/odoo/addons/base/models/ir_http.py b/odoo/addons/base/models/ir_http.py
index d9bef2df4d6..54f422bca32 100644
--- a/odoo/addons/base/models/ir_http.py
+++ b/odoo/addons/base/models/ir_http.py
@@ -11,6 +11,7 @@ import os
 import re
 import sys
 import traceback
+import threading
 
 import werkzeug
 import werkzeug.exceptions
@@ -21,6 +22,7 @@ import odoo
 from odoo import api, http, models, tools, SUPERUSER_ID
 from odoo.exceptions import AccessDenied, AccessError, MissingError
 from odoo.http import request, Response, ROUTING_KEYS, Stream
+from odoo.modules.registry import Registry
 from odoo.service import security
 from odoo.tools import consteq, submap
 from odoo.tools.translate import code_translations
@@ -172,7 +174,8 @@ class IrHttp(models.AbstractModel):
 
         if key not in cls._routing_map:
             _logger.info("Generating routing map for key %s" % str(key))
-            installed = request.env.registry._init_modules.union(odoo.conf.server_wide_modules)
+            registry = Registry(threading.current_thread().dbname)
+            installed = registry._init_modules.union(odoo.conf.server_wide_modules)
             if tools.config['test_enable'] and odoo.modules.module.current_test:
                 installed.add(odoo.modules.module.current_test)
             mods = sorted(installed)
diff --git a/odoo/addons/test_http/tests/test_misc.py b/odoo/addons/test_http/tests/test_misc.py
index 749983e1436..5aebb826613 100644
--- a/odoo/addons/test_http/tests/test_misc.py
+++ b/odoo/addons/test_http/tests/test_misc.py
@@ -85,12 +85,14 @@ class TestHttpMisc(TestHttpBase):
             ]
         }})
 
-        res = self.nodb_url_open('/jsonrpc', data=payload, headers=CT_JSON)
-        res.raise_for_status()
+        for method in (self.db_url_open, self.nodb_url_open):
+            with self.subTest(method=method.__name__):
+                res = method('/jsonrpc', data=payload, headers=CT_JSON)
+                res.raise_for_status()
 
-        res_rpc = res.json()
-        self.assertNotIn('error', res_rpc.keys(), res_rpc.get('error', {}).get('data', {}).get('message'))
-        self.assertIn(milky_way.name, res_rpc['result'], "QWeb template was correctly rendered")
+                res_rpc = res.json()
+                self.assertNotIn('error', res_rpc.keys(), res_rpc.get('error', {}).get('data', {}).get('message'))
+                self.assertIn(milky_way.name, res_rpc['result'], "QWeb template was correctly rendered")
 
 
 @tagged('post_install', '-at_install')