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I'm working on an Android Things-App that is always running and needs an internet connection. Android Things should be great for that purpose, however I experienced a strange bug: My Raspberry Pi 3 Model B running Developer Preview 4 loses its internet (ethernet) connection between 1 and 2 AM.

Observed beahvior:

  • This happens regardless of wether there is network activity or not (I've implemented a heartbeat which causes network traffic every 4 minutes but had no success)
  • This always happens at night between 01:00 and 02:00 (mostly around 01:20), it never occures later or earlier
  • The only way to resolve it is to turn the Raspberry off (pull the plug) and on again
  • I can't get the logcat because my RPi loses its internet connection
  • Unplugging and replugging the ethernet cable works fine (RPi reconnects as it should)

Does this issue affect other AT devices as well? Or is this something IP/router-specific?

Thanks in advance!

Edit:

The issue is filed here: https://issuetracker.google.com/37492221

Edit 2:

The RPi seems to fail to retrieve its IP-Address once the ethernet link is up again and thus stays disconnected. More details can be found here: https://issuetracker.google.com/issues/63121480

Candor
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  • have you tested another device on your network? sounds more like a router issue – Blundell May 29 '17 at 17:28
  • Maybe a provider maitainance work happening within the period? – Onik May 30 '17 at 15:36
  • @Blundell I haven't tried any other devices yet... Onik: Good point, but why is the connection not re-established at some later point? I will do some research about my router/provider – Candor May 30 '17 at 20:25
  • _"I can't get the logcat because my RPi loses its internet connection"_. You can if also the [debug console](https://stackoverflow.com/q/43554006/3290339) is connected. – Onik Jun 01 '17 at 04:30
  • @onik Sadly, I don't own such a cable, but someone else does and he confirmed, that the RPi does not properly reconnect to the network after a network failure. He filed a new issue here: https://issuetracker.google.com/issues/63121480 – Candor Jul 01 '17 at 14:29

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