"OSError: [Errno 48] Address already in use" (macOS 15.2)

[evfrenkel]

Describe the bug

Launch with:
changedetection.io -C ~/cd-data -p 5000 (also tried a few other ports)

Starting up fails and results in this:

Traceback (most recent call last):
  File "/Users/mainuser/.local/bin/changedetection.io", line 8, in <module>
    sys.exit(main())
             ~~~~^^
  File "/Users/mainuser/.local/pipx/venvs/changedetection-io/lib/python3.13/site-packages/changedetectionio/__init__.py", line 196, in main
    eventlet.wsgi.server(eventlet.listen((host, int(port)), s_type), app)
                         ~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/Users/mainuser/.local/pipx/venvs/changedetection-io/lib/python3.13/site-packages/eventlet/convenience.py", line 78, in listen
    sock.bind(addr)
    ~~~~~~~~~^^^^^^
OSError: [Errno 48] Address already in use

Version
Exact version in the top right area: 0.49.0 (cross checked with PyPI)

How did you install?

pipx

To Reproduce

Steps to reproduce the behavior:

1. Type changedetection.io -C ~/cd-data -p [any port]
2. See error

Expected behavior
Program does not error on launch

Desktop (please complete the following information):

• OS: macOS 15.2
• Browser: N/A

[dgtlmoon]

try a higher port number like 60000 , there may be some security setting?

[evfrenkel]

Same thing with that:

sudo changedetection.io -C ~/cd-data -p 60000
2025-01-24 10:25:44.341 | DEBUG    | changedetectionio.content_fetchers:<module>:43 - Falling back to selenium as fetcher
2025-01-24 10:25:44.392 | INFO     | changedetectionio.flask_app:<module>:91 - System locale default is ('en_US', 'UTF-8')
2025-01-24 10:25:44.400 | INFO     | changedetectionio.store:__init__:48 - Datastore path is '/Users/mainuser/../datastore/url-watches.json'
2025-01-24 10:25:44.407 | DEBUG    | changedetectionio.model.Watch:history:188 - Reading watch history index for 9a9707a5-a55e-4f9b-aec5-9ae274a87283
2025-01-24 10:25:44.407 | INFO     | changedetectionio.store:__init__:88 - Watching: 9a9707a5-a55e-4f9b-aec5-9ae274a87283 https://news.ycombinator.com/
2025-01-24 10:25:44.408 | DEBUG    | changedetectionio.model.Watch:history:188 - Reading watch history index for cbbc2a09-88b7-445e-b4e8-a0e940dbd60e
2025-01-24 10:25:44.408 | INFO     | changedetectionio.store:__init__:88 - Watching: cbbc2a09-88b7-445e-b4e8-a0e940dbd60e https://changedetection.io/CHANGELOG.txt
2025-01-24 10:25:44.408 | INFO     | changedetectionio.store:__init__:93 - Tag: 9ed0b4c3-5d6b-4b81-ba3f-0ff5100fcd31 Tech news
2025-01-24 10:25:44.408 | INFO     | changedetectionio.store:__init__:93 - Tag: 584e02f0-1710-4606-a465-d5458ffeefe4 changedetection.io
2025-01-24 10:25:44.408 | INFO     | changedetectionio.store:sync_to_json:384 - Saving JSON..
2025-01-24 10:25:44.418 | DEBUG    | changedetectionio.flask_app:ticker_thread_check_time_launch_checks:1780 - System env MINIMUM_SECONDS_RECHECK_TIME 3
Traceback (most recent call last):
  File "/Users/mainuser/.local/bin/changedetection.io", line 8, in <module>
    sys.exit(main())
             ~~~~^^
  File "/Users/mainuser/.local/pipx/venvs/changedetection-io/lib/python3.13/site-packages/changedetectionio/__init__.py", line 196, in main
    eventlet.wsgi.server(eventlet.listen((host, int(port)), s_type), app)
                         ~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/Users/mainuser/.local/pipx/venvs/changedetection-io/lib/python3.13/site-packages/eventlet/convenience.py", line 78, in listen
    sock.bind(addr)
    ~~~~~~~~~^^^^^^
OSError: [Errno 48] Address already in use

[dfuentes87]

I was having this same issue, but was able to resolve it by specifiying localhost: -h 127.0.0.1