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bug#35683: wishlist: addessing statefulness of .cache(s)

From: Giovanni Biscuolo
Subject: bug#35683: wishlist: addessing statefulness of .cache(s)
Date: Sat, 11 May 2019 14:59:49 +0200

Hello Tobias,

Tobias Geerinckx-Rice <address@hidden> writes:

> Giovanni Biscuolo wrote:
>> AFAIU unfortunately we have application/library state all over 
>> .cache(s)
>> that sometimes crashes software *and* trying to fix this 
>> upstream it's
>> _not_ an option [1]
> Oh.  That's… disappointing to say the least, since these are both 
> upstream bugs that Guix can't fix :-(
> What exactly did you ask?  What was their response?

I did not ask upstream, sorry for the misunderstanding: I'm just sharing
my *personal* experience, and I confess I never tried to report this
class of bugs upstream, I just fixed the issue with "rm

AFAIO (as far as I'm observing) this is a common pattern, for some
current Guix bug reports too (see previously provided links)

to be clear: I'm not stating we should not report upstream and help them

>> often users have to delete something in some .cache by guessing, 
>> "just"
>> to solve some strange software crash (this is common to all 
>> distros)
> I have never had to do this, ever.

lucky? :-) or Very Stateless™ userland configuration?

I'm not saying I had to do this sort of cache cleaning every week, but I
had to do that Too Often™ to be accepteble to me, on multiple
installations in 10 years


> We can randomly delete whole caches in the user's stead but it's 
> never the ‘right’ solution.

I agree, but please consider that we have to manage some upstream
defects [1], sometimes :-S

> Only the application can manage its caches properly.  I still hope
> this is possible in both cases here.

OK, but meanwhile?
IMHO it's not acceptable to have critical Guix services (e.g. GDM)
blocked by similar issues

...and sometimes (often?) statefullness of .cache is not considered
upstream, so I suspect this class of upstream bugs are _not_ going to
end soon

Thank you for your contribution! Gio'

[1] having data in .cache that crashes applications and services is bad
design IMHO, let alone having configuration in .cache

Giovanni Biscuolo

Xelera IT Infrastructures

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