Re: [HTCondor-users] Sudden death of a Rooster

[Tim Theisen <tim@xxxxxxxxxxx>]

Hello Steffen,

The sort operation requires a total ordering. Unfortunately with the 
current implementation, the rank expression is evaluated with each 
comparison in the sort. So, total ordering is likely not satisfied. We 
will be changing the implementation to only evaluate the rank expression 
once when sorting.

...Tim

On 12/9/25 02:57, Steffen Grunewald wrote:
> Good morning Greg,
>
> On Mon, 2025-12-08 at 10:34:16 -0600, HTCondor Users Mailinglist wrote:
> > On 12/8/25 09:07, Steffen Grunewald wrote:
> > > So the rooster is getting its own wings amended by a spaceship (operator)?
> > > I'm surprised that there are equal RANKs at all (I'm adding a good helping
> > > of random() to them)...
> > What are your RANK expressions? If there's a random() in there, it might be
> > making the crashing problem worse, as the code is written now.
> Although I don't fully understand the reasons and consequences, I removed the
> random(43200) terms - which I had added to shuffle the node list in an attempt
> to avoid unresponsive nodes (which are now slightly better understood, properly
> detected, and set to Absent to block further matches).
>
> Thanks for looking into this corner as well,
>   S
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--
Tim Theisen (he, him, his)
Release Manager
Center for High Throughput Computing
University of Wisconsin - Madison
3695 Morgridge Hall
1205 University Ave
Madison, WI 53706