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Re: [HTCondor-users] Job requirements with missing classads

Hi Jose,

Is this for a CE? If so, is there a reason why you aren't using the documented way to set a max walltime? https://htcondor-ce.readthedocs.io/en/latest/batch-system-integration/#maximum-walltime

To answer your question, this is touched on in the logical operators section in the ClassAd reference: https://htcondor.readthedocs.io/en/stable/misc-concepts/classad-mechanism.html#classad-operators. You can also use the Python bindings to inspect how a given expression would evaluate with UNDEFINED involved:

>>> import classad
>>> classad.ExprTree("UNDEFINED || False").eval()
>>> classad.ExprTree("UNDEFINED || True").eval()

I believe that the Negotiator treats requirements statements that evaluate to UNDEFINED as False.

- Brian

On 6/19/20 5:07 AM, jcaballero.hep@xxxxxxxxx wrote:

I feel this is a trivial question, but searching for undefined in the
documentation gives too many hits :)

So the question is what happen if you have something like this in your
schedd config

    set_Requirements = <other reqs> || (RemoteWallClockTime >
JobTimeLimit) || <other reqs>

but the jobs don't have classad JobTimeLimit?
Would that part of the logic just be evaluated as False?

Is there a link to documentation about this specific question where I
can educate myself?

Thanks a lot in advance.
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