openstack team mailing list archive

[Lorin Hochstein <lorin@xxxxxxxxxxxxxxxxxx>]

Looks like a textbook example of a "leaky abstraction" <http://www.joelonsoftware.com/articles/LeakyAbstractions.html> to me.

Take care,

Lorin
--
Lorin Hochstein
Lead Architect - Cloud Services
Nimbis Services, Inc.
www.nimbisservices.com


On Mar 2, 2012, at 1:35 PM, Joshua Harlow wrote:

> Does anyone else feel that the following seems really “dirty”, or is it just me.
> 
> “adding a few sleep(0) calls in various places in the
> Nova codebase (as was recently added in the _sync_power_states()
> periodic task) is an easy and simple win with pretty much no ill
> side-effects. :)”
> 
> Dirty in that it feels like there is something wrong from a design point of view.
> Sprinkling “sleep(0)” seems like its a band-aid on a larger problem imho. 
> But that’s just my gut feeling.
> 
> :-(
> 
> On 3/2/12 8:26 AM, "Armando Migliaccio" <Armando.Migliaccio@xxxxxxxxxxxxx> wrote:
> 
> I knew you'd say that :P
> 
> There you go: https://bugs.launchpad.net/nova/+bug/944145
> 
> Cheers,
> Armando
> 
> > -----Original Message-----
> > From: Jay Pipes [mailto:jaypipes@xxxxxxxxx]
> > Sent: 02 March 2012 16:22
> > To: Armando Migliaccio
> > Cc: openstack@xxxxxxxxxxxxxxxxxxx
> > Subject: Re: [Openstack] eventlet weirdness
> >
> > On 03/02/2012 10:52 AM, Armando Migliaccio wrote:
> > > I'd be cautious to say that no ill side-effects were introduced. I found a
> > race condition right in the middle of sync_power_states, which I assume was
> > exposed by "breaking" the task deliberately.
> >
> > Such a party-pooper! ;)
> >
> > Got a link to the bug report for me?
> >
> > Thanks!
> > -jay
> 
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