Dependencies

[Sean Russell]

On Monday 09 October 2006 13:43, Scott James Remnant wrote:
>> 2) A job goes into a perpetual "wait" state.  The
> > only way these could be handled is by time-out, but that's a really
> > bad solution.
...
> Can you provide any actual use cases for #2?  I've had a think and
> can't actually think of any.

No, but just because I can't think of one doesn't mean that it can't 
occur -- and that's my concern.  Upstart allows jobs to go into a wait 
state; therefore, it is possible for someone to define a job that 
conditionally depends on a "waiting" job.  The question is: how do you 
handle that case?

As I said, the other two cases have fairly straightforward behavior.

Does Upstart generate an event when a job goes into a wait state?  If it 
did, then there'd be an obvious solution for #2, too.  If it is a 
conditional dependency, and it generates a "wait", then consider the 
requirement as satisfied.  "Conditional" really should mean "I don't 
need this to start, but it would be nice to have."

Are there any cases I'm missing that could result in unexpected 
behavior?

> > Finally, would somebody with write access to the main Upstart page
...
> Have done so.

Thanks,


--- SER

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