[HTCondor-users] Idiom for job transforms with late-materialization factories

[Jeff Templon <templon@xxxxxxxxx>]

Hi,

If the user uses a late-materialization factory, then job transforms are applied twice - once when making the factory Ad, and then again for each instantiation of a job.

Is there some mechanism or idiom in the job transform language to help deal with this?  I have a case where a user might have specified a value for a ClassAd at job submission, and the transform is putting information into the same (multi valued) classAd, either creating it if it did not exist (the user specified nothing) or appending if the user did.  Since I donât know how to detect âfirst passâ or âsecond passâ, I get stuff like

Ad = user_value, system_value, system_value

The system value is repeated since the transform is repeated.  One solution is to forbid users to give their own values, Iâd like to avoid that though, there are good reasons why a user might do that.

JT