kernel: igb exceed max 2 second (system is unresponsive)

I have a system that is becoming unresponsive for anywhere from a few seconds to a couple minutes. The only messages I see in the logs are like this: Sep 16 18:07:33 server kernel: igb 0000:01:00.3: exceed max 2 second Sep 16 18:07:50 server kernel: igb 0000:01:00.3: exceed max 2 second Sep 16 18:07:58 server kernel: igb 0000:01:00.3: exceed max 2 second Sep 16 18:08:08 server kernel: igb 0000:01:00.3: exceed max 2 second Sep 16 18:08:17 server kernel: igb 0000:01:00.3: exceed max 2 second Sep 16 18:08:57 server kernel: igb 0000:01:00.3: exceed max 2 second Sep 16 18:09:04 server kernel: igb 0000:01:00.3: exceed max 2 second Sep 16 18:09:11 server kernel: igb 0000:01:00.3: exceed max 2 second Sep 16 18:09:25 server kernel: igb 0000:01:00.3: exceed max 2 second Sep 16 18:09:58 server kernel: igb 0000:01:00.3: exceed max 2 second Sep 16 18:10:05 server kernel: igb 0000:01:00.3: exceed max 2 second Sep 16 18:10:12 server kernel: igb 0000:01:00.3: exceed max 2 second Sep 16 18:10:24 server kernel: igb 0000:01:00.3: exceed max 2 second Sep 16 18:10:31 server kernel: igb 0000:01:00.3: exceed max 2 second Sep 16 18:10:38 server kernel: igb 0000:01:00.3: exceed max 2 second I'm not sure where to start troubleshooting this. Could these messages be related to the system becoming unresponsive?