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If the hook alarms while running in the execjob_begin event, the vnodes reported by the mom whose hook timed out will be marked as offline. This will be done via the hook's fail_action
If the hook alarms while running in the execjob_end event, the hook will reject.
Hook's attributes/HK file
These are the default attributes for the PBS_cray_atom hook:
type=pbs
enabled=false
user=pbsadmin
event=execjob_begin,execjob_end
order=100
alarm=300
fail_action=offline_vnodes
Hook Configuration File
Configuration will be formatted as a json object. For example, this is what the default will look like:
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