Denon device stops talking after resetting connection?

[chrisle]

I'm wondering if anyone else has noticed this:

If you try to connect to a device and it drops the connection when you ask for the device's service. Then from that point forward that device will stop talking entirely for a while?

I have two SC6000's (IP addresses player 1 = x.x.x.201 and player 2 = x.x.x.202).

First time around it tries to connect but the connection gets dropped.

2022/09/05 00:58:59 192.168.86.201 "sc6000" "JP13" "2.3.1"
2022/09/05 00:58:59 	attempting to connect to this device…
2022/09/05 00:58:59 	requesting device data services…
2022/09/05 00:58:59 WARNING: read tcp 192.168.86.33:64906->192.168.86.201:36133: read: connection reset by peer

I'll control-C, and try to run it again. But this time, player 1 stops announcing entirely.

$ go run cmd/stagelinq-discover/main.go
2022/09/05 00:59:28 Listening for devices for 5s
2022/09/05 00:59:28 192.168.86.202 "sc6000" "JP13" "2.3.1"
2022/09/05 00:59:28 	attempting to connect to this device…
2022/09/05 00:59:28 	requesting device data services…
2022/09/05 00:59:28 	offers StateMap at port 33085

Do you think that it somehow drops the connection then maybe needs time to internally restart the network card? As if it crashed inside the device and it's trying to restart itself?

Full console here

chrisle@chriss-imac [~/code/go-stagelinq]
$ go run cmd/stagelinq-discover/main.go
2022/09/05 00:58:59 Listening for devices for 5s
2022/09/05 00:58:59 192.168.86.201 "sc6000" "JP13" "2.3.1"
2022/09/05 00:58:59 	attempting to connect to this device…
2022/09/05 00:58:59 	requesting device data services…
2022/09/05 00:58:59 WARNING: read tcp 192.168.86.33:64906->192.168.86.201:36133: read: connection reset by peer
2022/09/05 00:58:59 192.168.86.201 "sc6000" "OfflineAnalyzer" "1.0.0"
2022/09/05 00:58:59 	attempting to connect to this device…
2022/09/05 00:58:59 	requesting device data services…
2022/09/05 00:58:59 	offers FileTransfer at port 40045
2022/09/05 00:58:59 	end of list of device data services
2022/09/05 00:58:59 192.168.86.201 "sc6000" "OfflineAnalyzer" "1.0.0"
2022/09/05 00:58:59 	attempting to connect to this device…
2022/09/05 00:58:59 	requesting device data services…
2022/09/05 00:58:59 	offers FileTransfer at port 39167
2022/09/05 00:58:59 	end of list of device data services
2022/09/05 00:58:59 192.168.86.202 "sc6000" "JP13" "2.3.1"
2022/09/05 00:58:59 	attempting to connect to this device…
2022/09/05 00:58:59 	requesting device data services…
2022/09/05 00:59:00 	offers StateMap at port 33085
2022/09/05 00:59:00 	/Engine/Deck1/Play = map[state:%!s(bool=false) type:%!s(float64=1)]
2022/09/05 00:59:00 	/Engine/Deck1/PlayState = map[state:%!s(bool=false) type:%!s(float64=1)]
2022/09/05 00:59:00 	/Engine/Deck1/Track/ArtistName = map[string: type:%!s(float64=8)]
2022/09/05 00:59:00 	/Engine/Deck1/Track/TrackNetworkPath = map[string: type:%!s(float64=8)]
2022/09/05 00:59:00 	/Engine/Deck1/Track/SongLoaded = map[state:%!s(bool=false) type:%!s(float64=1)]
2022/09/05 00:59:00 	/Engine/Deck1/Track/SongName = map[string: type:%!s(float64=8)]
2022/09/05 00:59:00 	/Engine/Deck1/Track/TrackData = map[state:%!s(bool=false) type:%!s(float64=3)]
2022/09/05 00:59:00 	/Engine/Deck1/Track/TrackName = map[string: type:%!s(float64=8)]
2022/09/05 00:59:00 	/Engine/Deck2/Play = map[state:%!s(bool=false) type:%!s(float64=1)]
2022/09/05 00:59:00 	/Engine/Deck2/PlayState = map[state:%!s(bool=false) type:%!s(float64=1)]
2022/09/05 00:59:00 	/Engine/Deck2/Track/ArtistName = map[string: type:%!s(float64=8)]
2022/09/05 00:59:00 	/Engine/Deck2/Track/TrackNetworkPath = map[string: type:%!s(float64=8)]
2022/09/05 00:59:00 	/Engine/Deck2/Track/SongLoaded = map[state:%!s(bool=false) type:%!s(float64=1)]
2022/09/05 00:59:00 	/Engine/Deck2/Track/SongName = map[string: type:%!s(float64=8)]
2022/09/05 00:59:00 	/Engine/Deck2/Track/TrackData = map[state:%!s(bool=false) type:%!s(float64=3)]
2022/09/05 00:59:00 	/Engine/Deck2/Track/TrackName = map[string: type:%!s(float64=8)]
2022/09/05 00:59:00 	/Client/Preferences/PlayerJogColorA = map[color:#ff1cd2e5 type:%!s(float64=16)]
2022/09/05 00:59:00 	/Client/Preferences/PlayerJogColorB = map[color:#ffea2828 type:%!s(float64=16)]
2022/09/05 00:59:00 	/Engine/Sync/Network/MasterStatus = map[state:%!s(bool=false) type:%!s(float64=1)]
2022/09/05 00:59:00 	/Engine/Master/MasterTempo = map[type:%!s(float64=0) value:%!s(float64=143.2281494140625)]
^Csignal: interrupt

chrisle@chriss-imac [~/code/go-stagelinq]
$ go run cmd/stagelinq-discover/main.go
2022/09/05 00:59:28 Listening for devices for 5s
2022/09/05 00:59:28 192.168.86.202 "sc6000" "JP13" "2.3.1"
2022/09/05 00:59:28 	attempting to connect to this device…
2022/09/05 00:59:28 	requesting device data services…
2022/09/05 00:59:28 	offers StateMap at port 33085
2022/09/05 00:59:28 	/Engine/Deck1/Play = map[state:%!s(bool=false) type:%!s(float64=1)]
2022/09/05 00:59:28 	/Engine/Deck1/PlayState = map[state:%!s(bool=false) type:%!s(float64=1)]
2022/09/05 00:59:28 	/Engine/Deck1/Track/ArtistName = map[string: type:%!s(float64=8)]
2022/09/05 00:59:28 	/Engine/Deck1/Track/TrackNetworkPath = map[string: type:%!s(float64=8)]
2022/09/05 00:59:28 	/Engine/Deck1/Track/SongLoaded = map[state:%!s(bool=false) type:%!s(float64=1)]
2022/09/05 00:59:28 	/Engine/Deck1/Track/SongName = map[string: type:%!s(float64=8)]
2022/09/05 00:59:28 	/Engine/Deck1/Track/TrackData = map[state:%!s(bool=false) type:%!s(float64=3)]
2022/09/05 00:59:28 	/Engine/Deck1/Track/TrackName = map[string: type:%!s(float64=8)]
2022/09/05 00:59:28 	/Engine/Deck2/Play = map[state:%!s(bool=false) type:%!s(float64=1)]
2022/09/05 00:59:28 	/Engine/Deck2/PlayState = map[state:%!s(bool=false) type:%!s(float64=1)]
2022/09/05 00:59:28 	/Engine/Deck2/Track/ArtistName = map[string: type:%!s(float64=8)]
2022/09/05 00:59:28 	/Engine/Deck2/Track/TrackNetworkPath = map[string: type:%!s(float64=8)]
2022/09/05 00:59:28 	/Engine/Deck2/Track/SongLoaded = map[state:%!s(bool=false) type:%!s(float64=1)]
2022/09/05 00:59:28 	/Engine/Deck2/Track/SongName = map[string: type:%!s(float64=8)]
2022/09/05 00:59:28 	/Engine/Deck2/Track/TrackData = map[state:%!s(bool=false) type:%!s(float64=3)]
2022/09/05 00:59:28 	/Engine/Deck2/Track/TrackName = map[string: type:%!s(float64=8)]
2022/09/05 00:59:28 	/Client/Preferences/PlayerJogColorA = map[color:#ff1cd2e5 type:%!s(float64=16)]
2022/09/05 00:59:28 	/Client/Preferences/PlayerJogColorB = map[color:#ffea2828 type:%!s(float64=16)]
2022/09/05 00:59:28 	/Engine/Sync/Network/MasterStatus = map[state:%!s(bool=false) type:%!s(float64=1)]
2022/09/05 00:59:28 	/Engine/Master/MasterTempo = map[type:%!s(float64=0) value:%!s(float64=143.2281494140625)]

[chrisle]

Nevermind.... I may have figured this out. It might be an implementation detail. I'm using @marbytedeep's typescript version. I'm not sure if he exactly ported the Go version. I'll take a closer look later.