About Internal Server Error on HTTP status page

[ma-anazawa]

Describe the bug
We are setting up multiple sources, but if there is at least one source that cannot perform a WHOIS query against the nrtm_host (*), and we try to display the HTTP status page, an Internal Server Error occurs and the page cannot be displayed. Is this a bug?

[Log when access to "http://.../v1/status/" fails (Internal Server Error)]

2023-04-18 00:15:26,686 irrd[722779]: [irrd.utils.whois_client#DEBUG] Running IRRD whois query !jARIN on rr.arin.net port 43
2023-04-18 00:15:41,707 irrd[722779]: [uvicorn.access#INFO] ::ffff:192.168.1.75:55378 - "GET /v1/status/ HTTP/1.1" 500
2023-04-18 00:15:41,708 irrd[722779]: [uvicorn.error#ERROR] Exception in ASGI application
Traceback (most recent call last):
File "/home/irrd/irrd-venv/lib/python3.6/site-packages/uvicorn/protocols/http/h11_impl.py", line 373, in run_asgi
result = await app(self.scope, self.receive, self.send)
File "/home/irrd/irrd-venv/lib/python3.6/site-packages/uvicorn/middleware/proxy_headers.py", line 75, in call
return await self.app(scope, receive, send)
File "/home/irrd/irrd-venv/lib/python3.6/site-packages/uvicorn/middleware/message_logger.py", line 82, in call
raise exc from None
File "/home/irrd/irrd-venv/lib/python3.6/site-packages/uvicorn/middleware/message_logger.py", line 78, in call
await self.app(scope, inner_receive, inner_send)
File "/home/irrd/irrd-venv/lib/python3.6/site-packages/starlette/applications.py", line 112, in call
await self.middleware_stack(scope, receive, send)
File "/home/irrd/irrd-venv/lib/python3.6/site-packages/starlette/middleware/errors.py", line 181, in call
raise exc from None
File "/home/irrd/irrd-venv/lib/python3.6/site-packages/starlette/middleware/errors.py", line 159, in call
await self.app(scope, receive, _send)
File "/home/irrd/irrd-venv/lib/python3.6/site-packages/irrd/server/http/app.py", line 85, in call
await self.app(scope, receive, send)
File "/home/irrd/irrd-venv/lib/python3.6/site-packages/starlette/exceptions.py", line 82, in call
raise exc from None
File "/home/irrd/irrd-venv/lib/python3.6/site-packages/starlette/exceptions.py", line 71, in call
await self.app(scope, receive, sender)
File "/home/irrd/irrd-venv/lib/python3.6/site-packages/starlette/routing.py", line 580, in call
await route.handle(scope, receive, send)
File "/home/irrd/irrd-venv/lib/python3.6/site-packages/starlette/routing.py", line 390, in handle
await self.app(scope, receive, send)
File "/home/irrd/irrd-venv/lib/python3.6/site-packages/starlette/endpoints.py", line 32, in dispatch
response = await run_in_threadpool(handler, request)
File "/home/irrd/irrd-venv/lib/python3.6/site-packages/starlette/concurrency.py", line 40, in run_in_threadpool
return await loop.run_in_executor(None, func, *args)
File "/usr/lib64/python3.6/concurrent/futures/thread.py", line 56, in run
result = self.fn(*self.args, **self.kwargs)
File "/home/irrd/irrd-venv/lib/python3.6/site-packages/irrd/server/http/endpoints.py", line 26, in get
response = StatusGenerator().generate_status()
File "/home/irrd/irrd-venv/lib/python3.6/site-packages/irrd/server/http/status_generator.py", line 34, in generate_status
self._generate_source_detail(database_handler)
File "/home/irrd/irrd-venv/lib/python3.6/site-packages/irrd/server/http/status_generator.py", line 115, in _generate_source_detail
remote_information = self._generate_remote_status_info(nrtm_host, nrtm_port, source)
File "/home/irrd/irrd-venv/lib/python3.6/site-packages/irrd/server/http/status_generator.py", line 151, in _generate_remote_status_info
source_status = whois_query_source_status(nrtm_host, nrtm_port, source)
File "/home/irrd/irrd-venv/lib/python3.6/site-packages/irrd/utils/whois_client.py", line 111, in whois_query_source_status
remote_status = whois_query_irrd(host, port, f'!j{source}')
File "/home/irrd/irrd-venv/lib/python3.6/site-packages/irrd/utils/whois_client.py", line 55, in whois_query_irrd
s = socket.create_connection((host, port), timeout=5)
File "/usr/lib64/python3.6/socket.py", line 724, in create_connection
raise err
File "/usr/lib64/python3.6/socket.py", line 713, in create_connection
sock.connect(sa)
OSError: [Errno 101] Network is unreachable

To Reproduce
[Example configuration of sources]

    ARIN:
        authoritative: false
        keep_journal: true
        import_serial_source: 'ftp://ftp.arin.net/pub/rr/ARIN.CURRENTSERIAL'
        import_source: 'ftp://ftp.arin.net/pub/rr/arin.db.gz'
        import_timer: 3600
      ※nrtm_host: rr.arin.net
        nrtm_port: 43
        object_class_filter:
            - as-set
            - aut-num
            - filter-set
            - inet-rtr
            - key-cert
            - mntner
            - peering-set
            - route
            - route6
            - route-set
            - rtr-set

IRRd version you are running
IRRD version 4.2.4