connection refused

[J1Buskens]

Hi everyone

I've been using Mainsail on MainsailOS for a few days now. however, every few minutes, I get a connection refused error when trying to access Mainsail. After a few minutes, I can connect again. In the logs, there is a socket.gaierror: [Errno -3] Temporary failure in name resolution error.

Can anyone help me?

below a snippet of my log:

2026-01-19 07:45:20,370 [klippy_apis.py:start_print()] - Requesting Job Start, filename = xy_joint_left_upper_MGN12.gcode
2026-01-19 07:45:20,381 [application.py:log_request()] - 201 POST /server/files/upload (192.168.1.113) [_TRUSTED_USER_] 1425.70ms
2026-01-19 07:45:20,499 [job_state.py:_send_job_event()] - Job Started: xy_joint_left_upper_MGN12.gcode
2026-01-19 07:45:47,998 [application.py:prepare()] - Upload Request Received from 192.168.1.113
Content-Type: multipart/form-data; boundary=----WebKitFormBoundaryGw73EK5JugS4R9rL
2026-01-19 07:45:48,013 [application.py:post()] - Processing Uploaded File: moonraker.conf
2026-01-19 07:45:48,022 [application.py:log_request()] - 201 POST /server/files/upload (192.168.1.113) [_TRUSTED_USER_] 26.06ms
2026-01-19 07:48:29,962 [websockets.py:write_to_socket()] - Websocket closed while writing: 547541790800
2026-01-19 07:48:32,756 [websockets.py:write_to_socket()] - Websocket closed while writing: 547413011664
2026-01-19 07:48:34,558 [websockets.py:on_close()] - Websocket Closed: ID: 547541790800 Close Code: None, Close Reason: None, Pong Time Elapsed: 45.00
2026-01-19 07:48:37,558 [websockets.py:on_close()] - Websocket Closed: ID: 547413011664 Close Code: None, Close Reason: None, Pong Time Elapsed: 44.98
2026-01-19 07:48:49,515 [application.py:log_request()] - 101 GET /websocket (192.168.1.125) [_TRUSTED_USER_] 3.28ms
2026-01-19 07:48:49,515 [websockets.py:open()] - Websocket Opened: ID: 547544535504, Proxied: False, User Agent: HomeAssistant/2026.1.0 aiohttp/3.13.3 Python/3.13, Host Name: 192.168.1.190
2026-01-19 07:49:24,980 [ioloop.py:_run_callback()] - Exception in callback functools.partial(<function _HTTPConnection.__init__.<locals>.<lambda> at 0x7f7c0b3920>, <Task finished name='Task-3047929' coro=<_HTTPConnection.run() done, defined at /home/jan/moonraker-env/lib/python3.11/site-packages/tornado/simple_httpclient.py:288> exception=gaierror(-3, 'Temporary failure in name resolution')>)
Traceback (most recent call last):
  File "/home/jan/moonraker-env/lib/python3.11/site-packages/tornado/ioloop.py", line 758, in _run_callback
    ret = callback()
          ^^^^^^^^^^
  File "/home/jan/moonraker-env/lib/python3.11/site-packages/tornado/simple_httpclient.py", line 285, in <lambda>
    gen.convert_yielded(self.run()), lambda f: f.result()
                                               ^^^^^^^^^^
  File "/home/jan/moonraker-env/lib/python3.11/site-packages/tornado/simple_httpclient.py", line 338, in run
    stream = await self.tcp_client.connect(
             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/jan/moonraker-env/lib/python3.11/site-packages/tornado/tcpclient.py", line 269, in connect
    addrinfo = await self.resolver.resolve(host, port, af)
               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/jan/moonraker-env/lib/python3.11/site-packages/tornado/netutil.py", line 438, in resolve
    for fam, _, _, _, address in await asyncio.get_running_loop().getaddrinfo(
                                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "uvloop/loop.pyx", line 1529, in getaddrinfo
socket.gaierror: [Errno -3] Temporary failure in name resolution
2026-01-19 07:49:26,463 [announcements.py:_fetch_moonlight()] - Failed to update subscription 'moonraker': Timeout while connecting
2026-01-19 07:49:30,482 [ioloop.py:_run_callback()] - Exception in callback functools.partial(<function _HTTPConnection.__init__.<locals>.<lambda> at 0x7f7461e660>, <Task finished name='Task-3048129' coro=<_HTTPConnection.run() done, defined at /home/jan/moonraker-env/lib/python3.11/site-packages/tornado/simple_httpclient.py:288> exception=gaierror(-3, 'Temporary failure in name resolution')>)
Traceback (most recent call last):
  File "/home/jan/moonraker-env/lib/python3.11/site-packages/tornado/ioloop.py", line 758, in _run_callback
    ret = callback()
          ^^^^^^^^^^
  File "/home/jan/moonraker-env/lib/python3.11/site-packages/tornado/simple_httpclient.py", line 285, in <lambda>
    gen.convert_yielded(self.run()), lambda f: f.result()
                                               ^^^^^^^^^^
  File "/home/jan/moonraker-env/lib/python3.11/site-packages/tornado/simple_httpclient.py", line 338, in run
    stream = await self.tcp_client.connect(
             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/jan/moonraker-env/lib/python3.11/site-packages/tornado/tcpclient.py", line 269, in connect
    addrinfo = await self.resolver.resolve(host, port, af)
               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/jan/moonraker-env/lib/python3.11/site-packages/tornado/netutil.py", line 438, in resolve
    for fam, _, _, _, address in await asyncio.get_running_loop().getaddrinfo(
                                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "uvloop/loop.pyx", line 1529, in getaddrinfo
socket.gaierror: [Errno -3] Temporary failure in name resolution
2026-01-19 07:49:40,503 [ioloop.py:_run_callback()] - Exception in callback functools.partial(<function _HTTPConnection.__init__.<locals>.<lambda> at 0x7f7461ea20>, <Task finished name='Task-3048506' coro=<_HTTPConnection.run() done, defined at /home/jan/moonraker-env/lib/python3.11/site-packages/tornado/simple_httpclient.py:288> exception=gaierror(-3, 'Temporary failure in name resolution')>)
Traceback (most recent call last):
  File "/home/jan/moonraker-env/lib/python3.11/site-packages/tornado/ioloop.py", line 758, in _run_callback
    ret = callback()
          ^^^^^^^^^^
  File "/home/jan/moonraker-env/lib/python3.11/site-packages/tornado/simple_httpclient.py", line 285, in <lambda>
    gen.convert_yielded(self.run()), lambda f: f.result()
                                               ^^^^^^^^^^
  File "/home/jan/moonraker-env/lib/python3.11/site-packages/tornado/simple_httpclient.py", line 338, in run
    stream = await self.tcp_client.connect(
             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/jan/moonraker-env/lib/python3.11/site-packages/tornado/tcpclient.py", line 269, in connect
    addrinfo = await self.resolver.resolve(host, port, af)
               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/jan/moonraker-env/lib/python3.11/site-packages/tornado/netutil.py", line 438, in resolve
    for fam, _, _, _, address in await asyncio.get_running_loop().getaddrinfo(
                                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "uvloop/loop.pyx", line 1529, in getaddrinfo
socket.gaierror: [Errno -3] Temporary failure in name resolution
2026-01-19 07:49:45,001 [ioloop.py:_run_callback()] - Exception in callback functools.partial(<function _HTTPConnection.__init__.<locals>.<lambda> at 0x7f7461ec00>, <Task finished name='Task-3048333' coro=<_HTTPConnection.run() done, defined at /home/jan/moonraker-env/lib/python3.11/site-packages/tornado/simple_httpclient.py:288> exception=gaierror(-3, 'Temporary failure in name resolution')>)
Traceback (most recent call last):
  File "/home/jan/moonraker-env/lib/python3.11/site-packages/tornado/ioloop.py", line 758, in _run_callback
    ret = callback()
          ^^^^^^^^^^
  File "/home/jan/moonraker-env/lib/python3.11/site-packages/tornado/simple_httpclient.py", line 285, in <lambda>
    gen.convert_yielded(self.run()), lambda f: f.result()
                                               ^^^^^^^^^^
  File "/home/jan/moonraker-env/lib/python3.11/site-packages/tornado/simple_httpclient.py", line 338, in run
    stream = await self.tcp_client.connect(
             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/jan/moonraker-env/lib/python3.11/site-packages/tornado/tcpclient.py", line 269, in connect
    addrinfo = await self.resolver.resolve(host, port, af)
               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/jan/moonraker-env/lib/python3.11/site-packages/tornado/netutil.py", line 438, in resolve
    for fam, _, _, _, address in await asyncio.get_running_loop().getaddrinfo(
                                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "uvloop/loop.pyx", line 1529, in getaddrinfo
socket.gaierror: [Errno -3] Temporary failure in name resolution

[meteyou]

do you use wifi?

[J1Buskens]

Yes, but often I can connect to mainsail, but mainsail won't connect to klipper

[meteyou]

mainsail can never connect to klipper directy. mainsail just connect to moonraker and moonraker is connected to klipper.

can you connect via ssh or ping the host/rpi while you cannot open mainsail?