"No buffer space available" on find and receive

[yeralin]

System information: • Operating system: MacOS Catalina 10.15.7 • Device: MacBook Pro (16-inch, 2019)

Steps to reproduce:

~ opendrop find
Looking for receivers. Press enter to stop ...
Error sending through socket 4
Traceback (most recent call last):
  File "/usr/local/lib/python3.8/site-packages/zeroconf/__init__.py", line 2889, in send
    bytes_sent = s.sendto(packet, 0, (real_addr, port))
OSError: [Errno 55] No buffer space available

~ opendrop receive
Announcing service: host 3c22fbf03a1f.ant.amazon.com, address fe80::7446:c4ff:fe51:d986, port 8771
Error sending through socket 4
Traceback (most recent call last):
  File "/usr/local/lib/python3.8/site-packages/zeroconf/__init__.py", line 2889, in send
    bytes_sent = s.sendto(packet, 0, (real_addr, port))
OSError: [Errno 55] No buffer space available
Starting HTTPS server

Expected results: Find new devices and/or receive incoming payload Actual results: Catching OSError: [Errno 55] No buffer space available errors upon execution.

Things tried: 1) Increasing datagram size:

sudo sysctl -w net.inet.udp.maxdgram=655350
net.inet.udp.maxdgram: 9216 -> 655350

No effect.

[yeralin]

Any ideas on this? :)

[schmittner]

I have no issues on macOS 10.15.7 with a MacBook Pro 2020.

Are you running on a clean install?

[yeralin]

Problem went away with a recent Mac update

[acheong08]

Got something to do with VPNs I think

[acheong08]

Same error here whenever a proxy or VPN is being used