Re: [HTCondor-users] IS_OWNER not stopping jobs from running

[Steffen Grunewald <steffen.grunewald@xxxxxxxxxx>]

On Thu, 2025-11-13 at 10:33:46 +0100, Andrew Pickford wrote:
> Hi All,
> 
> According to the documentation page for the Configuration for Execution
> Points, setting IS_OWNER to true should stop an execute node from accepting
> jobs. I'm not sure if I'm misreading the documentation here, or I've found a
> bug or maybe the partitionable slots that are configured for the execute
> node are not picking up the owner state correctly? Or something else. My
> first question is am I correct about IS_OWNER, should that stop jobs from
> starting?

I went back to my very old Condor configs (Debian Etch/Lenny/Squeeze) - don't
ask me for matching Condor versions though.
They tell me that IS_OWNER was used with its default setting in Etch and Lenny
times (before ~2010), but for Squeeze (2011 or 2012?) I recorded
#[default ] IS_OWNER      = ( START =?= False )
as a comment for completeness' sake, and I kept this (unset) in Wheezy times.

So this seems to indicate that the "IS_OWNER" attribute was derived from "START",
not the other way round - until around 2015 at least.

Around the release of Stretch (in 2017; not too precise) it seems that the
semantics changed - I find simultaneous settings of IS_OWNER = True *and*
START = False back then. If someone (the developers?) kept a VCS from 8--10
years ago, the exact background might be tracked down.

I have some extremely vague memory of "condor_drain" having been introduced
at some point, but it's already in 8.0.4 - the oldest manual I have kept
completely (my 7.6.4 one has been stripped down to the config section).
readthedocs doesn't have release notes that old (I found the 8.8 manual that
has the history back to 8.6).
Maybe someone else can look this up (i.e. what happened and why)?

Cheers,
 S

-- 
Steffen Grunewald, Cluster Administrator
Max Planck Institute for Gravitational Physics (Albert Einstein Institute)
Am Mühlenberg 1 * D-14476 Potsdam-Golm * Germany
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