mlat-client connection issue

[ianbashford]

Hi -- this looks similar to #61
this message constantly repeats

[mlat-client] Connected to multilateration server at feed1.adsbexchange.com:31090, handshaking
[mlat-client] Lost connection to feed1.adsbexchange.com:31090
[mlat-client] Reconnecting in 7.2 seconds
[mlat-client] Connected to multilateration server at feed2.adsbexchange.com:64590, handshaking
[mlat-client] Lost connection to feed2.adsbexchange.com:64590
[mlat-client] Reconnecting in 7.3 seconds
[mlat-client] Connected to multilateration server at feed1.adsbexchange.com:31090, handshaking
[mlat-client] Lost connection to feed1.adsbexchange.com:31090
[mlat-client] Reconnecting in 8.4 seconds

The machine is an RPI with FA dongle. It's running docker images:
ghcr.io/sdr-enthusiasts/docker-readsb-protobuf:latest

A piaware image
ghcr.io/sdr-enthusiasts/docker-piaware:latest

And the adsbexchange image
ghcr.io/sdr-enthusiasts/docker-adsbexchange:latest

I do get MLAT connections from piaware logs:

[piaware] 2023/05/03 09:08:09 mlat-client(368): Aircraft: 15 of 27 Mode S, 35 of 52 ADS-B used
[piaware] 2023/05/03 09:23:09 mlat-client(368): Receiver status: connected
[piaware] 2023/05/03 09:23:09 mlat-client(368): Server status:   synchronized with 498 nearby receivers
[piaware] 2023/05/03 09:23:09 mlat-client(368): Receiver:  717.3 msg/s received      116.0 msg/s processed (16%)
[piaware] 2023/05/03 09:23:09 mlat-client(368): Server:      0.1 kB/s from server    0.0kB/s TCP to server     1.3kB/s UDP to server
[piaware] 2023/05/03 09:23:09 mlat-client(368): Results:  58.7 positions/minute
[piaware] 2023/05/03 09:23:09 mlat-client(368): Aircraft: 10 of 24 Mode S, 37 of 51 ADS-B used
[piaware] 2023/05/03 09:38:09 mlat-client(368): Receiver status: connected
[piaware] 2023/05/03 09:38:09 mlat-client(368): Server status:   synchronized with 455 nearby receivers

Do you have any ideas?