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

[Brian Lin <blin@xxxxxxxxxxx>]

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.Value.Undefined
>>> classad.ExprTree("UNDEFINED || True").eval()
True

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:
> Hi,
>
> 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.
> Cheers,
> Jose
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