sbd watchdog timeout causes node to reboot during crash kernel execution

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Issue

sbd watchdog timeout causes node to reboot during crash kernel execution.
vmcore is not collected because SBD_WATCHDOG_TIMEOUT expires.
sbd reboots a node while kdump is running, even with fence_kdump configured.

Environment

Red Hat Enterprise Linux Server 6, 7 (with the High Availability Add-on)
Pacemaker
sbd

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