C7 Hub Keeps Crashing Randomly

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1

Morning, We've got a c7 which keeps crashing, what's odd though is that sometimes the automations still work but and the hub is just inaccessible. Even the diagnostic side isn't reachable. Its becoming more and more often which is now starting to cause problems. I've got a few errors in the logs but nothing major, any ideas what it could be?

dev:1492023-11-24 10:25:00.214warnNo route to host (Host unreachable)
2023-11-24 10:37:44.489 DEBUG dev|91|CoCoHue Bridge 2CA20E (Newby Dental)|initialize()

dev:1492023-11-24 10:25:00.214warnNo route to host (Host unreachable)

dev:702023-11-24 10:22:44.962infoStaff Room Sonos playing: KISSTORY playing Love Shy - Kristine Blond

dev:722023-11-24 10:22:44.794infoWaiting Room Upstairs Sonos playing: Heart 80s playing James Brown - Living In America

dev:732023-11-24 10:22:44.028infoWaiting Room Downstairs Sonos playing: Heart 80s playing James Brown - Living In America

dev:1572023-11-24 10:22:19.536infoSteri Lights energyDuration is 34.08 Days

dev:1572023-11-24 10:22:19.529infoSteri Lights energy is 0kWh

dev:1572023-11-24 10:22:13.526infoSteri Lights power is 0W

dev:982023-11-24 10:21:58.644infoClinical Fridge is 44%RH

dev:1532023-11-24 10:21:37.713infoSurgery 2 Lights energyDuration is 47.95 Days

dev:1532023-11-24 10:21:37.706infoSurgery 2 Lights energy is 2.2kWh

dev:1532023-11-24 10:21:32.365infoSurgery 2 Lights power is 0W

dev:1302023-11-24 10:21:29.558infoBack Up Server is on [physical]

dev:1332023-11-24 10:20:50.915errorTesla Power Wall - Exception when performing Login: groovyx.net.http.HttpResponseException: status code: 401, reason phrase: Unauthorized

dev:1332023-11-24 10:20:50.020errorTesla Power Wall - AuthCookie and/or UserRecord missing, will attempt Login again.

dev:702023-11-24 10:19:38.265infoStaff Room Sonos playing: KISSTORY playing Take Me to the Clouds Above - LMC vs. U2

dev:702023-11-24 10:19:37.901infoStaff Room Sonos playing: KISSTORY playing STOP ADBREAK 1

dev:1572023-11-24 10:18:43.518infoSteri Lights energyDuration is 34.08 Days

dev:1572023-11-24 10:18:43.511infoSteri Lights energy is 0kWh

dev:702023-11-24 10:18:40.075infoStaff Room Sonos playing: KISSTORY playing AD 6

dev:1572023-11-24 10:18:37.507infoSteri Lights power is 1W

2

I interpret what you've posted to indicate that the hub's network interface has crashed but the hub platform is still running.

This typically happens when the hub is on the same network segment as one or more other devices that are configured to use jumbo ethernet frames (JF). The solution would be to:

  1. Identify those devices, and turn off the use of JF.
  2. Since your hub has been restarted a few times by pulling power, it would be a good idea to do a soft-reset.

Also tagging @support_team.

2 Likes
3

If you cannot identify the devices that have been configured to use JF, another solution would be to connect the hubitat to your network via a Fast Ethernet switch. Such (older) switches are limited to 100 mbps, and will drop oversized ethernet frames. So there's no chance of the hub's network interface seeing a JF.

A 5-port fast ethernet switch would be < $10 on Amazon.

https://www.amazon.com/TP-Link-Ethernet-Splitter-Unmanaged-TL-SF1005D/dp/B000FNFSPY/

2 Likes
4

ah i think you're correct! we have jumbo frames enabled on our main back bone of the network that all switches connect to. Might have to buy a cheap switch to plug in like you say

5

Right JF will kill the hub...

1 Like
6

any idea why this happens?