[Buildbot-devel] canceling a build?

[Stefan Seefeld]

Greg Ward wrote:
> On Jan 31, 2008 5:40 PM, john gale <john at smadness.com> wrote:
>> I could have sworn that I saw somewhere a feature that allowed you to
>> "cancel" a build step, or a builder in general.  But greping google
>> and the manuals, I don't see anything obvious.
>>
>> Is there a way to allow canceling a buildstep?
> 
> The feature is there (at least with the patch in ticket #114), but it
> does not work too well for complex builds on Linux.  (This seems to
> depend on the particular signal semantics provided by the OS, so I
> cannot speak for BSD or Solaris or what-have-you; I have only used
> Buildbot on Linux and Windows.)
> 
> In particular, it appears to me that Buildbot only kills its immediate
> child process; all of *its* children in turn keep running.  So if you
> have a long-running build with lots of recursive "make" invocations,
> such that your process tree looks like this:
> 
>   buildbot[pid 5322]
>     make[pid 6436]
>       make[pid 6537]
>         make[pid 6539]
>           make[pid 6542]
>             gcc[pid 6543]
> 
> then when you "stop" a build, Buildbot only kills process 6436.  The
> others keep running.

Really ? The toplevel make should 'own' all its child-processes, and 
when it dies, its children should die with it. You'd have to take extra 
steps to have a child process start a new process group. I don't think 
make does that.

Regards,
		Stefan

-- 

       ...ich hab' noch einen Koffer in Berlin...