In this case I'm using a PBS job scheduler and whenever splunk sees a uncorrectable memory error I want it to offline the node within PBS itself.
the local command line syntax would be something like:
pbsnodes -o $hostname$
qmgr -c 's n $hostname$ comment="Splunk offlined this node due to uncorrectable memory errors"
Thus far I've been unsuccessful in having any way to trigger this as an alert action to a search.
Any help would be greatly appreciated!
Can you please provide more information on Custom Alert Action ? Have you created Custom Alert Action ? If yes, then is it possible you to provide your script which is running above command and other configuration file ?
If you are running bash/shell script in Custom Alert Action then have a look at answers thread on https://answers.splunk.com/answers/734938/custom-alerts-how-to-use-configured-variables-and-1.html , you will get idea how to read results of splunk query and then perform action on each output event in your script.