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Why server rebooted unexpectedly with "kernel: DEADMAN: System is set to reboot when the safety time expires" error message ?

Solution Unverified - Updated 2018-10-11T14:19:13+00:00 -

Issue

Why server rebooted unexpectedly with kernel: DEADMAN: System is set to reboot when the safety time expires error message ?

Environment

Red Hat Enterprise Linux
Service guard cluster is configured.

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