log message 'e1000e Detected Hardware Unit Hang' before system hangs

Solution Verified - Updated -

Issue

  • The network hardware unit hangs resulting in a hardware reset and the system unexpectedly hangs.
  • /var/log/messages contains the following warnings:
[963569.248045] e1000e 0000:00:1f.6 enp0s31f6: Detected Hardware Unit Hang:
[963571.254086] e1000e 0000:00:1f.6 enp0s31f6: Reset adapter unexpectedly
[963575.073817] e1000e: enp0s31f6 NIC Link is Up 1000 Mbps Full Duplex, Flow Control: None
[963691.387160] e1000e 0000:00:1f.6 enp0s31f6: Detected Hardware Unit Hang:

Environment

  • Red Hat Enterprise Linux 7.7 (kernel-3.10.0-1062.el7) and earlier
  • Intel network interface using e1000e driver.

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